A soil nail wall is a stabilization method of reinforcing existing soil by installing threaded steel bars into slopes or cuts as wall construction proceeds from top down. Grouted bars are installed to create a stable mass of earth, first step in building a solid wall. The nailing process creates a single block of earth able to hold-back its overburden. Soil nailing is an economical means of creating shoring systems and retaining walls. Often, nailing is less disruptive than other means of constructing retaining systems.
Soil nail walls not only works in tension, but also bending and shearing forces. Generally, the process increases bonding strength of media through its ability to carry tensile loads. A constructed face is usually required over shoring bars, typically made of a shotcrete cover, which is reinforced using woven mesh over steel plates. Permanent walls are usually built with a cast-in-place face over nailing.