The Permanent Engineering of Soil Nailing and Its Durability Design

An overall view of the permanent engineering of soil nailing is summarized so as to provide design references for its much wide use. Summing-up analyses on the research and development of the permanent engineering of soil nailing, both domestically and abroad, are given. Based on the corrosion of subsoil and the service life, the rust-resistant measurements are selected from one of the measures as follows: (a) increasing the diameter of nail rods; (b) zinc coating or epoxy coating on the surface of nail rods; (c) ensuring thickness of protective coating of the grout; and (d) adopting enclosed rust-resistant nails. Several engineering cases of permanent soil nailing are examined. Soil nailing, as a kind of reliable permanent earth retaining structure, uses less material and decreases the amount of engineering.