Ground improvement is a technique used in geotechnical engineering to enhance the properties of soil and rock beneath the surface of the earth. This can involve methods such as compaction, grouting, soil mixing, soil reinforcement, and ground freezing to strengthen the ground and increase its load-bearing capacity. Ground improvement is often used in construction projects to provide a stable foundation for buildings, roads, bridges, and other structures. By improving the ground, engineers can reduce settlement, prevent slope instability, and mitigate the effects of seismic activity.