EXPERTISEDesign, Johnston Trenchless Solutions, Tunnelling
SERVICESMicrotunnelling, Shaft Sinking, Augerboring
We installed 1,400m of 1200 mm diameter jacking pipes using ISEKI Full-Face; remotely – controlled pipe-jacking machinery and laser-controlled steering. The shafts ranged in depth from 5m to 10m with 6m diameters for the Launch Shafts and 4.5m for Reception Shafts. The segmental shafts were constructed using the caisson method.
We worked alongside Kier in developing the tunnelling solution as an alternative to open cut. This approach mitigates the risks associated with deep excavations alongside the existing carriageway where there is the potential to encounter running sands.
Design Services | Temporary Works