Which term refers to the method of injecting a material into the ground to stabilize it?

The method of injecting a material into the ground to stabilize it is referred to as grouting. Grouting involves the introduction of a fluid material—often a mixture of water, cement, and sometimes additives—into the soil or a void to improve its strength and fill any gaps or cracks. This process is essential in various civil engineering applications, including soil stabilization, waterproofing, and repairing fissures in existing structures.

Grouting helps enhance the load-bearing capacity of the soil and can prevent settlement or erosion that might affect structures built on or within the ground. The injected material can also bond with surrounding soil particles, creating a more cohesive mass that increases stability.

In contrast, piling refers to the use of long, slender columns driven deep into the ground to support structures, while excavating involves the removal of earth to create space for construction. Shoring is a temporary support system put in place during excavation to prevent soil collapse. None of these options entail the injection of materials for stabilization in the same way that grouting does.