Soil Nailing and Anchoring in a Temporary Shoring Application

Soil nailing and anchoring is increasingly adopted in slope stabilization. Our popular approach to achieving slope stabilization is covering the slope with flexible steel mesh facing. In North America these systems are typically anchored only at the top, allowing the mesh material to drape freely down the slope. The weight and friction of the mesh material provides stability, and allows controlled downward movement of material. More advanced installations provide deeper stabilization by holding the mesh to the surface with anchors or soil nails throughout. These designs are largely dependent on the ability of the system to transfer forces from the facing material to the anchor points. The low tensile strength of conventional wire mesh has lead to the use of steel wire rope nets, but these nets tend to be relatively expensive.

These limitations have been overcome by the development of a cost-effective diagonal wire mesh manufactured from high tensile strength, highly corrosion-resistant wire. In extensive testing this mesh has demonstrated a strength approaching that of wire rope nets. Additional development has produced an anchor plate that optimizes force transfer from mesh to anchors. These factors allow the mesh to be pre-tensioned against the slope, which restricts deformations in critical surface sections and prevents movement along planes of weakness. Newly developed dimensioning models yield an engineered design of these systems, including anchor design. Numerous such systems have been installed throughout Europe and the USA review of material properties and system performance will be presented in addition to a temporary shoring application.