Advanced Construction Techniques Ltd. (ACT) services

Compaction grouting is typically performed in loose or weak soils to mitigate settlements and is also used for sinkhole remediation. Compaction grouting involves the injection of a very stiff, mortar like, cementitious grout into soil to densify or compact the soil under high pressure. When injected, the grout will not permeate the surrounding soils, but instead form “grout bulbs” that laterally displace the soil. By repeating the process in adjacent holes the soil between the holes is densified through the lateral displacement.

A cement-bentonite or soil-bentonite Cut-Off Wall’s (COW) primary purpose is to mitigate the flow of groundwater.  The COW is constructed using a trench cutter and can be installed in almost  any soil conditions.  The trench cutter makes ‘bites’ to excavate rectangular panels in the earth.