Jet grouting, a critical component of soil improvement, involves the on-site blending of soil with injected cement grout to form stabilized soil columns. This process enhances the soil’s structural integrity and decreases its permeability, making it a superior engineered solution for foundation support and groundwater control. Its applications are diverse, including underpinning existing structures and establishing cutoff walls for excavation support.
The technique starts with the drilling of a small-diameter pipe (around 4 inches) to the required depth. High-pressure cement grout, typically around 6,000 psi, is then injected through this pipe. As the pipe is rotated and withdrawn, a circular column of improved soil is formed. The diameter of these columns can be adjusted, providing flexibility in the construction process. These columns can either act as standalone supports or be interlinked to form a barrier against the movement of soil and water.