Retaining wall and soil nail walls are commonly used in road and rail cuttings to provide temporary and permanent earth support and retention during excavation for new construction. This method is used for the stabilisation of slopes and batters and the protection of existing cuts.
Survey set-out is generally required to ensure that the soil nails are located at the correct design location both vertically and horizontally. Additionally survey set-out can provide the cut off length of the nails to ensure that the designed face of the wall is constructed in its intended location. As built or as constructed survey measurements can be made to ascertain the design integrity of the wall once the face of the wall has been constructed. Survey measurements can also determine if there may be any clashes or interference with other services or structures that may incur additional work and expense prior to the drilling of the nails.