Ground Improvement is a technique that improves the engineering properties of the treated soil mass. Usually, the properties modified are shear strength, stiffness and permeability. Ground improvement has developed into a sophisticated tool to support foundations for a wide variety of structures. Properly applied, i.e. after giving due consideration to the nature of the ground being improved and the type and sensitivity of the structures being built, ground improvement often reduces direct costs and saves time.The increasing need to redevelop land in urban areas has led to major development in the field of ground improvement, a process that is continuing and expanding. The techniques are compactiongrouting, jet grouting, in situ soil mixing and drain pile. The factors which can influence theeffectiveness of each technique are identified.

For strong basement, ground improvement is necessary, because it reduces the risk of any damage later on. Today, jet grouting technique is used on various grounds for hardening them. This technique involves high-pressure system through which fluid is injected into the soil.Ground improvement is carried out for various objectives: to improve bearing capacity and reduce settlement of soft ground, prevent earthquake liquefaction, control groundwater, stabilize excavation bottom, prevent deformation of surrounding ground, or clean up contaminated ground.