Description
The basic concept of a soil or rock nail is based on the installation of longitudinal reinforcement elements into the ground. Hence, this load-bearing system significantly differs from ground anchors (actively tensioned) and tensile piles, as the nail is installed un-tensioned (passive system). Consequently, nails increase the load-bearing capacity of the entire structure and act as a group of elements, withstanding tensile and shear forces acting on the nails. The center-to-center distance of nails must be chosen as such they are able to act as a complete nailing system. Prior to nail installation, the excavation face is generally supported by shotcrete, precast concrete elements, mesh, or geotextiles. The design of a nail head construction depends on the application and the intended lifetime of the structure.
Conventional nail systems consisting of solid threaded bars are installed into pre-drilled holes and subsequently grouted. DSI rock and soil nails are installed self-drilling, and are either grouted simultaneously during drilling or afterwards.
1. Drill Bit
2. Grout Body
3. Coupling
4. Hollow Bar
5. Nail Head
