Jet grouting is a ground improvement technique used in construction to strengthen soils or create barriers. It involves the high-pressure injection of a cementitious grout into the ground, typically in a grid pattern, to create columns or masses of soil-cement. The process begins with the drilling of boreholes to the desired depth, after which a high-pressure jet of grout is injected into the soil, breaking it up and mixing it with the grout. As the grout cures, it forms solid columns or masses

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Permeation grouting is a ground improvement technique in which low-viscosity grout, such as cement-based or chemical solutions, is injected under controlled pressure into the pores and voids of granular soils without significantly disturbing their structure. The grout permeates the soil matrix and hardens, thereby increasing the strength, stiffness, and impermeability of the treated ground. This method is most effective in coarse sands and gravels where grout can flow freely through the void spa