When you’ve got 350 metres of gravity flow pipeline to install under road and rail…
… and the ground is too rocky for HDD…
… and the distance is beyond the limits of auger boring…
… all the site is in the middle of a business park…
You sometimes need to rethink your approach.
So, you sink an 11-metre-deep secant pile shaft and use it as the central launch shaft for two microtunnels — one heading east, the other heading west.
That’s what SUBTERRA has just completed for the regional water authority SIVOM SAGe in southern France.
Before construction began, the preparatory phase set the tone with great collaboration between SUBTERRA and OPTIMUM, ensuring the microtunnel engineering was validated by specialists and perfectly aligned with the project’s constraints.
The new microtunnels will now connect SIVOM SAGe’s water treatment plant to a brand-new research facility, strengthening the backbone of its network.
The right solution isn’t always the easiest one, but the one that truly works.
