Shaft Sinking

A E Yates Trenchless Solutions Ltd have the expertise and the equipment to construct all types of shafts and pits whether they are for tunnelling or are standalone structures as storage chambers, pumping stations or manholes. We can construct segmental shafts to 25m internal diameter and up to 50m deep by underpinning, wet or dry caissons.

Caisson method

A E Yates Trenchless Solutions Ltd would use the caisson method of shaft sinking when ground conditions were incapable of being self supporting. A cutting edge is used and the shaft is pushed down from the surface as the ground is excavated from the inside.

Underpinning method

A E Yates Trenchless Solutions Ltd would use this method of shaft sinking in ground conditions that are stable and self supporting. When using this method there is never more than 1.2m of ground opened. Segmental rings are built and the area between their outside diameter and the excavated ground is immediately grouted.

Using the caisson or underpinning method is cost effective as the walls of the segments become the walls of the tank.

Cofferdam excavation

A E Yates Trenchless Solutions Ltd would use this method to build a temporary construction to facilitate the installation of mechanised pipejack tunnels and the construction of smaller permanent works.

A E Yates Trenchless Solution Ltd have a number of Shaft Sinking Case Studies

Shaft sinking using caisson methodFinished shaft using caisson method

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