Jet Grouting
(Jet Grout Columns)
Jet grouting is a ground improvement technique that improves unsuitable soils in-place and is used for underpinning existing foundations, constructing earth support walls, and constructing groundwater cutoff walls. The process of jet grouting involves advancing steel drill rods using a high-pressure bottom discharge water/grout jet, stopping the bottom-discharge once the predetermined design depth is reached, and then engaging a high pressure side-discharge grout jet that erodes and mixes the soil as the drill rod string is slowly rotated and gradually withdrawn. This process creates “soilcrete” jet grout columns with increased strength and reduced permeability.
