A caisson wall is composed of a series of vertically drilled holes which are interlocked. This method provides a more rigid system of excavation support than a soldier pile and lagging wall and is therefore a more suitable choice adjacent to existing buildings or structures sensitive to movement. It is also used in areas with poor or wet ground conditions where it would not be possible to install wood lagging without loss of ground such as excavations penetrating below the water table. Caisson walls can be braced by rakers, struts or tiebacks similar to a lagged shoring system.
This shoring system is more costly than the lagged shoring system.
The Anchor Shoring Group of Companies has extensive experience with the design and installation of caisson walls. We would evaluate the soil conditions and the adjacent structures to be retained to select the appropriate shoring system for your project.
Caisson walls are required for the earth retention systems in areas of reclaimed land at the Toronto waterfront. The Anchor Shoring Group of Companies are proud to have completed caisson walls for York University Station, Highway 407 Station, 1 Bloor St East, 1 York St, The Madison, Casa II, and Maple Leaf Square.