Herbens spillway - Saint Etienne France
                                                                                           Cut-off and thin grout wall

SLURRY WALL

Wall excavated with conventional plant using a cement-bentonite mix to ensure the stability of the trench during excavation. The mix is self-hardening after a few hours.

REINFORCED SLURRY WALL

Installation of H or I steel beams in fresh slurry turn the "flexible" slurry wall into a retaining wall.

THIN GROUT WALL

An H steel beam with high inertia is vibro-driven into the ground. After retrieval, the footprint is filled with grout. The H beam is moved to the centreline of the wall and the operation is repeated.

COMPOSITE WALL

Drainage and water-tightness improvement techniques can be combined using a draining material and a watertight membrane in the same trench.