Soil Nails are Deep Foundation elements that provide reinforcement of excavations, natural or man-made slopes and slip planes. Soil Nails are not typically post-tensioned.
Soil Nails consist of closely spaced steel bars drilled and grouted in place and can be installed either horizontally or vertically. Although the name includes the word "soil", Soil Nails may be installed in a variety of soil types and conditions including soft or weathered rock.
Depending on placement, Soil Nails may be installed with or without surface reinforcement although the most common method of installation includes facing. Soil Nail Walls can be temporary or permanent and may be faced with reinforced concrete, shotcrete, high tensile strength wire mesh, and wood or steel lagging.
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Vertical or near-vertical excavations of 3'-6' or more require shoring of the ground adjacent to the cut. Soil nail walls are a type of excavation support system that can provide temporary or permanent support for cuts or slopes during excavation.
Soil Nails Walls can be faced steel reinforced shotcrete if desired. The shotcrete creates a solid surface on the wall face. Drains are installed behind the shotcrete to account for infiltration of water.
A High Tensile Wire Mesh facing can be used as facing for the Soil Nail Wall. The wire mesh is anchored with soil nails and tensioned to the proper specification. With this system, vegetation can grow up through the mesh, allowing the treated area to appear more natural over time.
Permanent stabilization of slopes, cuts and slip planes can be accomplished with soil nails. A soil nail installation can be designed with or without facing to lock the ground in place and prevent future movement of the soil.