{"id":5758,"date":"2025-01-17T14:17:04","date_gmt":"2025-01-17T13:17:04","guid":{"rendered":"https:\/\/www.optimum-te-recette.horizon-ci.fr\/trenchless-technology\/"},"modified":"2026-01-14T13:48:10","modified_gmt":"2026-01-14T12:48:10","slug":"trenchless-technology","status":"publish","type":"page","link":"https:\/\/www.optimum-te.com\/en\/trenchless-technology\/","title":{"rendered":"Trenchless Technology"},"content":{"rendered":"

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Trenchless Techniques<\/h1>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”40px||0px||false|false” top_divider_height=”30px” locked=”off” global_colors_info=”{}”][et_pb_row _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”||20px||false|false” custom_padding=”0px||0px||false|false” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” text_text_color=”gcid-1d235d5a-bde9-4418-b29f-6b56f59b2c8e” link_text_color=”gcid-heading-color” hover_transition_duration=”0ms” global_colors_info=”{%22gcid-1d235d5a-bde9-4418-b29f-6b56f59b2c8e%22:%91%22text_text_color%22%93,%22gcid-secondary-color%22:%91%22link_text_color__hover%22%93,%22gcid-heading-color%22:%91%22link_text_color%22%93}” link_text_color__hover_enabled=”on|desktop” link_text_color__hover=”#ffc000″]<\/p>\nHome<\/a><\/span><\/span>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”0px||0px||false|false” custom_padding=”0px||60px||false|false” locked=”off” global_colors_info=”{}”][et_pb_row column_structure=”1_5,1_5,1_5,1_5,1_5″ use_custom_gutter=”on” gutter_width=”2″ make_equal=”on” _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”0px||0px||false|false” custom_padding=”0px||0px||false|false” global_colors_info=”{}” text_text_color__hover=”#FFFFFF” text_text_color__hover_enabled=”on|desktop”][et_pb_column type=”1_5″ _builder_version=”4.27.0″ _module_preset=”default” background_color=”gcid-22313caf-a0bd-4f98-adb7-e9887f0bf068″ link_option_url=”#visite-de-site” background_last_edited=”off|desktop” custom_css_main_element=”display: flex;||flex-direction: column;||justify-content: center;” border_radii=”on|5px|5px|5px|5px” global_colors_info=”{%22gcid-22313caf-a0bd-4f98-adb7-e9887f0bf068%22:%91%22background_color%22%93,%22gcid-primary-color%22:%91%22background_color__hover%22%93}” background__hover_enabled=”on|desktop” background_color__hover=”#004475″ background_enable_color__hover=”on” custom_css_main_element__hover_enabled=”on|desktop” custom_css_main_element__hover=”color:#ffffff;”][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” text_font=”|600|||||||” custom_padding=”20px|5px|20px|5px|true|false” link_option_url=”#foncage” global_colors_info=”{}” text_text_color__hover_enabled=”on|desktop” text_text_color__hover=”#FFFFFF”]<\/p>\n

Auger boring<\/p>\n

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Horizontal Directional Drilling<\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”1_5″ _builder_version=”4.27.0″ _module_preset=”default” background_color=”gcid-22313caf-a0bd-4f98-adb7-e9887f0bf068″ link_option_url=”#assistance-a-maitrise-d-ouvrage-amo” custom_css_main_element=”display: flex;||flex-direction: column;||justify-content: center;” border_radii=”on|5px|5px|5px|5px” global_colors_info=”{%22gcid-22313caf-a0bd-4f98-adb7-e9887f0bf068%22:%91%22background_color%22,%22background_color%22%93,%22gcid-primary-color%22:%91%22background_color__hover%22%93}” background_color__hover=”#004475″ background__hover_enabled=”on|desktop” custom_css_main_element__hover=”color:#ffffff;” custom_css_main_element__hover_enabled=”on|desktop” background_enable_color__hover=”on”][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” text_font=”|600|||||||” custom_padding=”20px|5px|20px|5px|true|false” link_option_url=”#direct-pipe” global_colors_info=”{}” text_text_color__hover=”#FFFFFF” text_text_color__hover_enabled=”on|desktop”]<\/p>\n

Direct Pipe\u00ae<\/p>\n

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Microtunnelling<\/p>\n

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Tunnelling<\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ module_id=”pourquoi” _builder_version=”4.27.0″ _module_preset=”default” background_color=”#FFFFFF” custom_padding=”0px||50px||false|false” top_divider_color=”gcid-primary-color” top_divider_height=”30px” global_colors_info=”{%22gcid-primary-color%22:%91%22top_divider_color%22%93}”][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”||||false|false” animation_style=”fade” border_radii=”on|10px|10px|10px|10px” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” text_text_color=”#000000″ header_2_font=”|700|||||||” header_2_font_size=”26px” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” locked=”off” global_colors_info=”{}”]<\/p>\n

Why choose trenchless technology?<\/h2>\n

In an increasingly populated world, minimizing our environmental impact is crucial; using trenchless technology to install underground energy and utility networks is a game changer.<\/p>\n

Trenchless installation techniques, such as horizontal directional drilling (HDD) and microtunnelling, offer a more sustainable solution for network expansion, by reducing surface disruption, protecting existing infrastructure and reaching previously inaccessible areas.<\/p>\n

Choosing the most appropriate technique is key to the success of a project.<\/p>\n

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Different trenchless techniques<\/h3>\n

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Each trenchless crossing is unique. A variety of trenchless techniques exist, each with its own characteristics and advantages.<\/p>\n

[\/et_pb_text][et_pb_blurb use_icon=”on” font_icon=”E||divi||400″ icon_color=”gcid-secondary-color” icon_placement=”left” image_icon_width=”24px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#FFFFFF” body_font_size=”16px” image_icon_custom_margin=”0px|0px|0px|0px|false|false” image_icon_custom_padding=”0px|0px|0px|0px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” global_colors_info=”{%22gcid-secondary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Auger boring<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”E||divi||400″ icon_color=”gcid-secondary-color” icon_placement=”left” image_icon_width=”24px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#FFFFFF” body_font_size=”16px” image_icon_custom_margin=”0px|0px|0px|0px|false|false” image_icon_custom_padding=”0px|0px|0px|0px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” global_colors_info=”{%22gcid-secondary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Horizontal Directional Drilling<\/p>\n

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Direct Pipe\u00ae<\/b><\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”E||divi||400″ icon_color=”gcid-secondary-color” icon_placement=”left” image_icon_width=”24px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#FFFFFF” body_font_size=”16px” image_icon_custom_margin=”0px|0px|0px|0px|false|false” image_icon_custom_padding=”0px|0px|0px|0px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” global_colors_info=”{%22gcid-secondary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Microtunnelling<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”E||divi||400″ icon_color=”gcid-secondary-color” icon_placement=”left” image_icon_width=”24px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#FFFFFF” body_font_size=”16px” image_icon_custom_margin=”0px|0px|0px|0px|false|false” image_icon_custom_padding=”0px|0px|0px|0px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” global_colors_info=”{%22gcid-secondary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Tunnelling<\/p>\n

[\/et_pb_blurb][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” text_text_color=”#FFFFFF” width=”100%” custom_margin=”20px||0px||false|false” custom_padding=”||20px||false|false” locked=”off” global_colors_info=”{}”]<\/p>\n

Choosing the right technique depends on several factors: customer requirements, crossing dimensions, industry regulations, and the geological and geotechnical conditions of the jobsite. After a thorough analysis by trenchless specialists, one technique will stand out, either from a technical or an economical perspective.<\/p>\n

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Auger boring \/ Horizontal drilling<\/h2>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”2_5,3_5″ _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”0px||||false|false” custom_padding=”0px||||false|false” animation_style=”fade” locked=”off” global_colors_info=”{}”][et_pb_column type=”2_5″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.optimum-te.com\/wp-content\/uploads\/2025\/01\/Foncage-marteau.png” title_text=”Foncage marteau” align=”center” _builder_version=”4.27.0″ _module_preset=”default” width_tablet=”80%” width_phone=”80%” width_last_edited=”on|tablet” module_alignment=”center” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][et_pb_column type=”3_5″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” header_3_text_color=”#000000″ custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22header_text_color%22,%22header_text_color%22,%22header_text_color%22%93}”]<\/p>\n

Efficient techniques for reduced length crossings<\/h3>\n

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While basic, boring techniques are very efficient in specific terrains and contexts. They ensure the hole is maintained open as construction progresses and pass under obstacles by creating a straight path between two excavated pits \/ shafts. These techniques can be equipped with simple guidance systems and are ideal for rectilinear structures, typically up to 120 meters in length.<\/p>\n

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Three principal techniques exist<\/p>\n

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Auger boring<\/p>\n

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Down-the-hole hammer drilling<\/p>\n

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Pipe ramming<\/p>\n

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Auger boring<\/h3>\n

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Auger boring is a technique used in soft ground, where a steel pipe is pushed into the earth from a launch pit. As the tube advances, a helical auger excavates the soil in place.<\/p>\n

The process relies on a drill bit at the front of the pipe, which rotates to excavate the ground as the tube progresses forward.<\/p>\n

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Auger boring: At a glance<\/strong><\/p>\n

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Advantages<\/p>\n

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Smaller length crossings<\/p>\n

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Drilled hole maintained<\/p>\n

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Suitable ground conditions<\/p>\n

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Soft ground<\/p>\n

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Soft rock<\/p>\n

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Coarse ground (with adapted tooling)<\/p>\n

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Dimensions<\/p>\n

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Diameters from 300mm to 1400mm<\/p>\n

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Lengths of less than 140m<\/p>\n

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Down-the-hole hammer drilling<\/h3>\n

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For rock formations or those with significant blocometry, the traditional drill bit is replaced by a pneumatic hammer.<\/p>\n

The hammer breaks up the ground in front of it, with the crushed material being evacuated to the launch pit via an auger. Progresses continues, pipe after pipe, until the reception pit is reached.<\/p>\n

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Down-the-hole hammer drilling: At a glance<\/strong><\/p>\n

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Advantages<\/p>\n

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Smaller length crossings<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Crossing rocky terrain or terrain containing blocks<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Drilled hole maintained<\/p>\n

[\/et_pb_blurb][\/et_pb_column][et_pb_column type=”1_3″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#ffc000″ icon_placement=”left” image_icon_width=”24px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|600|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”0px|0px|0px|0px|false|false” image_icon_custom_padding=”0px|0px|0px|0px|false|false” module_alignment=”left” custom_margin=”10px||0px||false|false” custom_padding=”||0px||false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-secondary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Suitable ground conditions<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Pebbles and blocky gravel<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Rocks<\/p>\n

[\/et_pb_blurb][\/et_pb_column][et_pb_column type=”1_3″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#ffc000″ icon_placement=”left” image_icon_width=”24px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|600|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”0px|0px|0px|0px|false|false” image_icon_custom_padding=”0px|0px|0px|0px|false|false” module_alignment=”left” custom_margin=”10px||0px||false|false” custom_padding=”||0px||false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-secondary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Dimensions<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Diameters from 350mm to 1200mm<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Lengths of less than 120m<\/p>\n

[\/et_pb_blurb][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.27.0″ _module_preset=”default” custom_padding=”60px||50px||false|false” global_colors_info=”{}”][et_pb_row column_structure=”1_2,1_2″ use_custom_gutter=”on” gutter_width=”1″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” header_3_text_color=”#000000″ custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22header_text_color%22,%22header_text_color%22,%22header_text_color%22%93}”]<\/p>\n

Pipe ramming<\/h3>\n

[\/et_pb_text][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” text_text_color=”#000000″ custom_margin=”||40px||false|false” custom_padding=”||0px||false|false” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22header_text_color%22,%22header_text_color%22,%22header_text_color%22%93}”]<\/p>\n

Pipe ramming involves driving an open pipe into the ground from a launch pit using impact force. Although this method is more basic and unguided, it remains effective for low linear projects and areas near the water table.<\/p>\n

As the ramming process continues, the pipe collects the displaced ground until it reaches the reception pit. Once in place, the pipe is emptied using hydraulic or mechanical methods, leaving a steel pipe in position, ready for installation of the network or pipeline.<\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.optimum-te.com\/wp-content\/uploads\/2025\/03\/battage.png” title_text=”battage” align=”right” align_tablet=”center” align_phone=”center” align_last_edited=”on|phone” _builder_version=”4.27.0″ _module_preset=”default” width=”80%” module_alignment=”right” module_alignment_tablet=”center” module_alignment_phone=”center” module_alignment_last_edited=”on|desktop” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”0px||0px||false|false” custom_padding=”0px||0px||false|false” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” text_font=”|700|||||||” text_text_color=”gcid-primary-color” text_font_size=”21px” global_colors_info=”{%22gcid-primary-color%22:%91%22header_text_color%22,%22text_text_color%22%93}”]<\/p>\n

Pipe ramming: At a glance<\/strong><\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_3,1_3,1_3″ _builder_version=”4.27.0″ _module_preset=”default” background_color=”gcid-22313caf-a0bd-4f98-adb7-e9887f0bf068″ custom_margin=”10px||||false|false” custom_padding=”20px|30px|20px|30px|true|true” border_radii=”on|10px|10px|10px|10px” global_colors_info=”{%22gcid-22313caf-a0bd-4f98-adb7-e9887f0bf068%22:%91%22background_color%22%93}”][et_pb_column type=”1_3″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#ffc000″ icon_placement=”left” image_icon_width=”24px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|600|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”0px|0px|0px|0px|false|false” image_icon_custom_padding=”0px|0px|0px|0px|false|false” module_alignment=”left” min_height=”25px” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-secondary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Advantages<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Lower costs<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Drilled hole maintained<\/p>\n

[\/et_pb_blurb][\/et_pb_column][et_pb_column type=”1_3″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#ffc000″ icon_placement=”left” image_icon_width=”24px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|600|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”0px|0px|0px|0px|false|false” image_icon_custom_padding=”0px|0px|0px|0px|false|false” module_alignment=”left” custom_margin=”10px||0px||false|false” custom_padding=”||0px||false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-secondary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Suitable ground conditions<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Soft and fine soils<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Soft and gravelly soils<\/p>\n

[\/et_pb_blurb][\/et_pb_column][et_pb_column type=”1_3″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#ffc000″ icon_placement=”left” image_icon_width=”24px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|600|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”0px|0px|0px|0px|false|false” image_icon_custom_padding=”0px|0px|0px|0px|false|false” module_alignment=”left” custom_margin=”10px||0px||false|false” custom_padding=”||0px||false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-secondary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Dimensions<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Diameters from 300mm to 1400mm<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#000000″ body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Lengths of less than 80m<\/p>\n

[\/et_pb_blurb][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ module_id=”forage” _builder_version=”4.27.0″ _module_preset=”default” background_color=”gcid-primary-color” background_enable_image=”off” width=”100%” max_width=”1920px” module_alignment=”center” custom_padding=”50px||50px||false|false” top_divider_style=”curve” top_divider_color=”#FFFFFF” top_divider_height=”30px” top_divider_flip=”vertical” locked=”off” global_colors_info=”{%22gcid-052ae396-db0a-47fc-9945-06590b33bb77%22:%91%22top_divider_color%22%93,%22gcid-primary-color%22:%91%22background_color%22%93}”][et_pb_row _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”||||false|false” custom_padding=”||0px||false|false” animation_style=”fade” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” header_font=”|800||on|||||” header_text_color=”#FFFFFF” header_2_text_color=”#FFFFFF” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” custom_css_after=” content: %22%22;|| display: inline-block;|| width: 40px;|| height: 7px;|| background-color: #FFC000;||\t\tmargin-bottom:20px” locked=”off” global_colors_info=”{}”]<\/p>\n

Horizontal Directional Drilling<\/h2>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”3_5,2_5″ _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”||||false|false” custom_padding=”0px||||false|false” animation_style=”fade” global_colors_info=”{}”][et_pb_column type=”3_5″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” header_3_text_color=”#FFFFFF” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22header_text_color%22,%22header_text_color%22,%22header_text_color%22%93}”]<\/p>\n

Rapid execution with limited environmental impact<\/h3>\n

[\/et_pb_text][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” text_text_color=”#FFFFFF” width=”100%” custom_margin=”||20px||false|false” custom_padding=”||||false|false” locked=”off” global_colors_info=”{}”]<\/p>\n

Horizontal Directional Drilling (HDD) often offers the advantage of being quick to implement and cost-effective. HDD is a widely used technique for crossing obstacles such as rivers or roads. It involves drilling directly from the surface of the ground along a predefined, inverted arc-shaped path.<\/p>\n

[\/et_pb_text][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#FFFFFF” custom_margin=”||0px||false|false” custom_padding=”||5px||false|false” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22header_text_color%22,%22header_text_color%22%93}”]<\/p>\n

Horizontal Directional Drilling typically proceeds in three stages<\/p>\n

[\/et_pb_text][et_pb_blurb use_icon=”on” font_icon=”E||divi||400″ icon_color=”gcid-secondary-color” icon_placement=”left” image_icon_width=”24px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#FFFFFF” body_font_size=”16px” image_icon_custom_margin=”0px|0px|0px|0px|false|false” image_icon_custom_padding=”0px|0px|0px|0px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” global_colors_info=”{%22gcid-secondary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Pilot Hole:<\/strong> This creates the drilling profile, one rod at a time, connecting the entry point to the exit point.<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”E||divi||400″ icon_color=”gcid-secondary-color” icon_placement=”left” image_icon_width=”24px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#FFFFFF” body_font_size=”16px” image_icon_custom_margin=”0px|0px|0px|0px|false|false” image_icon_custom_padding=”0px|0px|0px|0px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” global_colors_info=”{%22gcid-secondary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Reaming:<\/strong> This expands the diameter of the hole in one or more passes until it is 30% to 50% larger than the pipe or network to be installed. If the pilot hole’s diameter is sufficient, reaming may not be necessary.<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”E||divi||400″ icon_color=”gcid-secondary-color” icon_placement=”left” image_icon_width=”24px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#FFFFFF” body_font_size=”16px” image_icon_custom_margin=”0px|0px|0px|0px|false|false” image_icon_custom_padding=”0px|0px|0px|0px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” global_colors_info=”{%22gcid-secondary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Pullback:<\/strong> This is the phase where the pre-assembled pipe or network is pulled into the reamed hole in one continuous section.<\/p>\n

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Drilling Fluids<\/h3>\n

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A drilling fluid is systematically injected into the drilled hole at each stage of Horizontal Directional Drilling (HDD) (pilot hole, reaming, and pullback operations). This fluid helps lubricate and cool the drilling tools, stabilize the drilled hole, and, most importantly, carry soil debris out of the hole.<\/p>\n

The fluid is injected under pressure through rods and exits through the drilling tools inside the hole. It is typically a mixture of fresh water and bentonite, although its composition, quantity, and density can be adjusted based on the soil characteristics and site constraints.<\/p>\n

More complex drilling fluids also exist, such as those made from polymers or seawater, which can be especially useful for landfall projects.<\/p>\n

[\/et_pb_text][dsm_button button_one_text=”Video: limiting the risks of resurgences in FHD” button_one_url=”https:\/\/www.youtube.com\/watch?v=0g3jQYuKwVI” button_one_video_popup=”on” separator_gap=”36px” _builder_version=”4.27.0″ _module_preset=”default” custom_button_one=”on” button_one_text_size=”16px” button_one_text_color=”#FFFFFF” button_one_bg_color=”gcid-secondary-color” button_one_border_width=”0px” button_one_border_color=”RGBA(255,255,255,0)” button_one_border_radius=”6px” button_one_font=”|600|||||||” button_one_icon=”||divi||400″ button_one_icon_placement=”left” button_one_on_hover=”off” locked=”off” global_colors_info=”{%22gcid-secondary-color%22:%91%22button_one_bg_color%22%93,%22gcid-primary-color%22:%91%22button_one_bg_color__hover%22,%22button_one_text_color__hover%22%93}” button_one_bg_color__hover_enabled=”off|hover” button_one_bg_color__hover=”#004475″ button_one_bg_enable_color__hover=”on” button_one_text_color__hover_enabled=”on|hover” button_one_text_color__hover=”#004475″][\/dsm_button][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”50px||0px||false|false” custom_padding=”0px||0px||false|false” locked=”off” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” text_font=”|700|||||||” text_text_color=”#ffffff” text_font_size=”21px” global_colors_info=”{%22gcid-primary-color%22:%91%22header_text_color%22%93}”]<\/p>\n

Horizontal Directional Drilling (HDD): At a glance<\/p>\n

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Advantages<\/p>\n

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Quick execution<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#FFFFFF” icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#FFFFFF” body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22,%22icon_color%22,%22icon_color%22%93}”]<\/p>\n

Direct installation of pipelines<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#FFFFFF” icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#FFFFFF” body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22,%22icon_color%22,%22icon_color%22%93}”]<\/p>\n

Work directly from the surface<\/p>\n

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Limited environmental impact<\/p>\n

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Suitable ground conditions<\/p>\n

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Sands (<2 mm)<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#FFFFFF” icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#FFFFFF” body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22,%22icon_color%22,%22icon_color%22,%22icon_color%22%93}”]<\/p>\n

Silts<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#FFFFFF” icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#FFFFFF” body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22,%22icon_color%22,%22icon_color%22,%22icon_color%22%93}”]<\/p>\n

Clays<\/p>\n

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Homogeneous, unfractured rocks<\/p>\n

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Dimensions<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#FFFFFF” icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#FFFFFF” body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22,%22icon_color%22,%22icon_color%22,%22icon_color%22,%22icon_color%22,%22icon_color%22%93}”]<\/p>\n

Diameters from 50mm to 1400mm<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#FFFFFF” icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#FFFFFF” body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Lengths from 10m to 5000m<\/p>\n

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Direct Pipe\u00ae<\/h2>\n

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An innovative technique for complex trenchless crossings<\/h3>\n

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Direct Pipe\u00ae<\/strong>, by Herrenknecht AG, is an innovative technique that combines the advantages of both Horizontal Directional Drilling (HDD) and microtunnelling. It allows for work to be carried out directly from the surface without the need for deep excavated entry and exit shafts, whilst also benefiting from microtunnelling technology, which enables tunnelling through almost all types of terrain with unmatched precision.<\/p>\n

This technique is particularly well-suited for landfall projects as it minimizes offshore mobilisation requirements. It is also relevant for crossings where the geological conditions make HDD implementation unfeasible.<\/p>\n

[\/et_pb_text][dsm_button button_one_text=”Video: The importance of geotechnical considerations in Direct Pipe\u00ae” button_one_url=”https:\/\/www.youtube.com\/watch?v=WwXn2ucO43c” button_one_video_popup=”on” separator_gap=”36px” _builder_version=”4.27.0″ _module_preset=”default” custom_button_one=”on” button_one_text_size=”16px” button_one_text_color=”#FFFFFF” button_one_bg_color=”gcid-secondary-color” button_one_border_width=”0px” button_one_border_color=”RGBA(255,255,255,0)” button_one_border_radius=”6px” button_one_font=”|600|||||||” button_one_icon=”||divi||400″ button_one_icon_placement=”left” button_one_on_hover=”off” hover_enabled=”0″ locked=”off” global_colors_info=”{%22gcid-secondary-color%22:%91%22button_one_bg_color%22%93,%22gcid-primary-color%22:%91%22button_one_bg_color__hover%22,%22button_one_text_color__hover%22%93}” button_one_bg_color__hover_enabled=”off|hover” button_one_bg_color__hover=”#004475″ button_one_bg_enable_color__hover=”on” button_one_text_color__hover_enabled=”on|hover” button_one_text_color__hover=”#004475″ sticky_enabled=”0″][\/dsm_button][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”0px||||false|false” custom_padding=”30px||||false|false” locked=”off” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” header_3_text_color=”#000000″ custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22header_text_color%22,%22header_text_color%22,%22header_text_color%22%93}”]<\/p>\n

Direct installation by Pipe Thrusters<\/em><\/h3>\n

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Direct Pipe allows for the direct installation of steel pipes (coated or uncoated) following an inverted arc profile, similar to those constructed using the HDD technique. The excavation tool connected at the front of the steel pipe is an AVN-type microtunnel boring machine (TBM), while the push force required is transmitted through the steel pipe, pushed from the surface by a Pipe Thruster<\/em>. Located at the entry point, the Pipe Thruster<\/em> uses \u00ab\u00a0circular jaws\u00a0\u00bb to grip the steel pipe, in 5-metre sections, and apply a longitudinal push force of up to 750 tons without damaging the pipe. If necessary, multiple Pipe Thrusters<\/em> can be connected, one behind the other, to increase the push force available.<\/p>\n

The steel pipe is assembled at the surface, behind the thrusters, in one or more sections depending on the site conditions, minimizing as far as possible the number of intermediate welds required. In this way, a long Direct Pipe installation can be carried out without having the entire pipe length behind the thrusters at any one time. Each steel pipe section must be pre-equipped with all the necessary connections to operate the microtunnel boring machine (energy, marine lines, lubrication, communication, etc.).<\/p>\n

Finally, the steel pipe installed by Direct Pipe can serve as either the final structure or as a casing for networks installed inside it.<\/p>\n

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Direct Pipe : At a glace<\/p>\n

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Advantages<\/p>\n

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Work directly from the surface<\/p>\n

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High thrust force capacity<\/p>\n

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Adaptable for all ground conditions<\/p>\n

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Pipe stability<\/p>\n

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Reduced jobsite surface<\/p>\n

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Suitable ground conditions<\/p>\n

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All ground conditions<\/p>\n

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Dimensions<\/p>\n

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Diameters from DN750 to DN1500 (30″ to 60″)<\/p>\n

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Length from 400m to 2000m<\/p>\n

[\/et_pb_blurb][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ module_id=”microtunnelage” _builder_version=”4.27.0″ _module_preset=”default” background_color=”gcid-primary-color” background_enable_image=”off” width=”100%” max_width=”1920px” module_alignment=”center” custom_padding=”50px||50px||false|false” top_divider_style=”curve” top_divider_color=”#FFFFFF” top_divider_height=”30px” top_divider_flip=”vertical” locked=”off” global_colors_info=”{%22gcid-052ae396-db0a-47fc-9945-06590b33bb77%22:%91%22top_divider_color%22%93,%22gcid-primary-color%22:%91%22background_color%22%93}”][et_pb_row _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”||||false|false” custom_padding=”||0px||false|false” animation_style=”fade” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” header_font=”|800||on|||||” header_text_color=”#FFFFFF” header_2_text_color=”#FFFFFF” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” custom_css_after=” content: %22%22;|| display: inline-block;|| width: 40px;|| height: 7px;|| background-color: #FFC000;||\t\tmargin-bottom:20px” locked=”off” global_colors_info=”{}”]<\/p>\n

Microtunnelling<\/h2>\n

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Precise and flexible tunnelling in all ground conditions<\/h3>\n

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The most sophisticated tunnelling technique, microtunnelling, is applicable in a wide range of geological formations and allows for precise control over key mechanical and hydraulic parameters, as well as the drill trajectory. The technique is particularly advantageous as it mechanically supports the tunnel as construction progresses and allows for great flexibility in the geometrical design of the structures.<\/p>\n

The microtunnel boring machine (MTBM) used is usually an AVN type: a hydraulic machine that enables both control of the hydraulic pressure at the cutting face as well as the transportation of the excavated material back to the surface.<\/p>\n

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Excavated ground maintained throughout construction<\/h3>\n

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Microtunnelling involves excavating a tunnel from a launch shaft and advancing concrete, GRP, or steel pipes behind the microtunnelling machine as it progresses. As tunnelling continues, the entire microtunnel system moves forward, powered by a thrust system installed in the launch shaft.<\/p>\n

A lubrication fluid, injected at the upper surface of the microtunnel, lubricates the system to reduce friction between the tunnel and the surrounding ground.<\/p>\n

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Microtunnelling at a glance:<\/p>\n

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Advantages<\/p>\n

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Precision and ability to achieve complex geometries<\/p>\n

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Excavated ground supported during construction<\/p>\n

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Waterproof structures, potentially accessible after completion<\/p>\n

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Suitable for gravity-flow networks<\/p>\n

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Suitable ground conditions<\/p>\n

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Almost all geotechnical conditions<\/p>\n

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Dimensions<\/p>\n

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Diameters from 500mm to 4000mm<\/p>\n

[\/et_pb_blurb][et_pb_blurb use_icon=”on” font_icon=”||fa||900″ icon_color=”#FFFFFF” icon_placement=”left” image_icon_width=”6px” content_max_width=”100%” _builder_version=”4.27.0″ _module_preset=”default” body_font=”|300|||||||” body_text_color=”#FFFFFF” body_font_size=”16px” image_icon_custom_margin=”|||0px|false|false” image_icon_custom_padding=”9px|||14px|false|false” module_alignment=”left” custom_margin=”||0px||false|false” custom_padding=”||0px|20px|false|false” custom_css_free_form=”.et_pb_blurb_position_left .et_pb_blurb_container {|| padding-left:0px;||}” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22icon_color%22%93}”]<\/p>\n

Lengths up to 2000m<\/p>\n

[\/et_pb_blurb][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ module_id=”tunnelage” _builder_version=”4.27.0″ _module_preset=”default” background_color=”#FFFFFF” background_enable_image=”off” width=”100%” max_width=”1920px” module_alignment=”center” custom_margin=”||||false|false” custom_padding=”50px||50px||false|false” top_divider_style=”curve” top_divider_color=”gcid-primary-color” top_divider_height=”30px” bottom_divider_color=”gcid-primary-color” bottom_divider_height=”30px” bottom_divider_flip=”vertical” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22top_divider_color%22%93}”][et_pb_row _builder_version=”4.27.0″ _module_preset=”default” background_color=”RGBA(255,255,255,0)” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” animation_style=”fade” border_radii=”off|5px|5px||” locked=”off” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” header_font=”|800||on|||||” header_text_color=”gcid-primary-color” header_2_text_color=”gcid-primary-color” custom_padding=”||||false|false” custom_css_after=” content: %22%22;|| display: inline-block;|| width: 40px;|| height: 7px;|| background-color: #FFC000;||\t\tmargin-bottom:20px” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22header_text_color%22,%22header_2_text_color%22%93}”]<\/p>\n

Tunnelling<\/h2>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”2_5,3_5″ _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”0px||||false|false” custom_padding=”0px||||false|false” animation_style=”fade” locked=”off” global_colors_info=”{}”][et_pb_column type=”2_5″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.optimum-te.com\/wp-content\/uploads\/2025\/02\/TUNNEL-HOME-et-ST.png” title_text=”TUNNEL – HOME et ST” align=”center” _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][et_pb_column type=”3_5″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” header_3_text_color=”#000000″ custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” locked=”off” global_colors_info=”{%22gcid-primary-color%22:%91%22header_text_color%22,%22header_text_color%22,%22header_text_color%22%93}”]<\/p>\n

A technique for large diameter and long linear structures<\/h3>\n

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Similar to microtunnelling, from which it is derived, tunnelling allows for the excavation of larger diameter structures. This technique also enables the use of various machine technologies for greater control over the excavation process, further reducing soil-structure interactions.<\/p>\n

During excavation, unlike microtunnelling, prefabricated segments are placed inside the tunnel, to form it\u2019s structure. This assembly of individual segments, rather than the installation of complete pipe rings, significantly facilitates the construction of large-diameter tunnels. The completed sections of the tunnel then support the boring machine as it progresses, allowing for the construction of very long structures.<\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

Trenchless TechniquesHome<\/a><\/span><\/span>Auger boringHorizontal Directional DrillingDirect Pipe\u00aeMicrotunnellingTunnellingWhy choose trenchless technology? In an increasingly populated world, minimizing our environmental impact is crucial; using trenchless technology to install underground energy and utility networks is a game changer. Trenchless installation techniques, such as horizontal directional drilling (HDD) and microtunnelling, offer a more sustainable solution for network expansion, by reducing […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","inline_featured_image":false,"footnotes":""},"class_list":["post-5758","page","type-page","status-publish","hentry"],"yoast_head":"\nTrenchless techniques - OPTIMUM<\/title>\n<meta name=\"description\" content=\"Advantages of different trenchless techniques and structures : auger boring, Horizontal Directional Drilling (HDD), Direct Pipe, microtunnelling, tunnelling\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.optimum-te.com\/en\/trenchless-technology\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Trenchless techniques - 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