by admin-optimum-549 | Dec 8, 2022 | Water
Great to have accompanied SUBTERRA during the successful completion of a complex double DN1400 microtunnel in Portet-sur-Garonne, southwestern France, linking local water treatment facilities. Site conditions, in a dense urban environment, required both tunnels to...
by admin-optimum-549 | Nov 17, 2022 | Water
Immensely proud to have accompanied BESSAC and SADE during the now completed 610-metre-long, up to 30-metre-deep, AVN2500 microtunnel crossing under the River Seine in the centre of Paris. In a complex geological environment, the gravity-flow tunnel had to cross not...
by admin-optimum-549 | Sep 23, 2021 | Water
Proud to accompany EIFFAGE yesterday during the successful completion of a 130m-long DN 800 PRV microtunnel in Massy, near Paris, as part of the sanitation network diversions being put in place by the Paris Saclay local authority. The entry / exit shafts were...
by admin-optimum-549 | Nov 2, 2020 | Water
Boring a 530 metre-long, 2.15 metre-wide microtunnel in one of the hardest and most abrasive rocks calls for the highest levels of vigilance. Add to that a 26-metre height difference between the entry and exit points as well as a crossing both a river and the busy...
