What is the Process of Compaction Grouting?
Compaction grouting is a ground improvement technique that involves the controlled, high-pressure injection of low-mobility cementitious grout into the soil. The grout mass expands, displaces the soil, and compresses it to increase its density and strength. The process creates a series of very stiff, bulbous grout columns surrounded by soil of increased density. The grout does not flow away from the injection zone or permeate the surrounding soil significantly. Compaction grouting is used to repair sinkholes, improve soils under new or existing structures, re-level facilities, improve collapsible soils, mitigate liquefaction, and control settlement. The low slump grout is injected at multiple locations under the ground, and the process is monitored to ensure that the desired results are achieved. Compaction grouting can improve the bearing capacity of the ground, increase its resistance to liquefaction, and densify the soil to support structures and infrastructure.
