In order to create a cutoff wall, artificial ground freezing can also be used.Ĭut-off walls are used to remove groundwater from an excavation in order to minimize the dewatering pumping demand.
In addition to being constructed from sheet piles, grout barriers, slurry trench walls, mix-in-place barriers, concrete diaphragm walls, or bored pile walls can also be made of cutoff walls. A top range for cut off walls is the sheet pile. In order to keep them in place, cutoff walls are most commonly vertical and forced into a deep layer of earth (bedrock or clay). Usually, building a cutoff wall requires creating an impermeable barrier that covers the perimeter of the job site. To hold groundwater out of excavation areas and eventually to remove the need for dewatering using pumping and other techniques, a cutoff wall is built.
