3D METHOD STATEMENT OF A DAM CUTOFF / PLASTIC SECANT PILE WALL / CEMENT BENTONITE / SEEPAGE BARRIER CONSTRUCTION

The video shows the construction of a cutoff wall to remediate or prevent seepage of water from happening under a dam or reservoir. The seepage over time can cause the foundation of the dam to weaken, potentially leading to the collapse of the dam itself. The construction of the wall is accomplished with the construction of a cement bentonite (also called CB or coulis) plastic secant pile wall. This is undertaken with the usage of modern equipment that can dig through both soils and rocks. Wall thicknesses can vary up to 3m. The wall can reach depths of up to 250m.

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