A study on soil nailing for various C-ɸ soils in Tavanur area

Abstract

The soil nailing technique is adopted to reinforce the earth for the stabilization of the slopes. The soil nail wall is constructed by the installation of iron bars or iron nails into the soil which has to be retained. The nails are installed from top to bottom at suitable angle with horizontal and vertical spacing through out the specified height of the slope. We have selected soil samples from three locations in the campus of KCAET, Tavanur. For our study various engineering properties of the soil samples were determined. The soil nail wall design was done by incorporating those engineering properties of soil and the nature of the terrain. An epoxy coated MS rod with diameter above 16mm was used as nail The estimation and costing when compared to cantilever retaining wall reveals that soil nail wall is more feasible than the retaining wall. From the cost analysis we found that, soil nail wall gives 55% saving in cost than retaining wall construction. A computer program was developed in Visual basic 2005 which gives various outputs for the design from the given inputs. It was concluded that the designed soil nail wall system can be strongly recommended for the stabilization of free board of river bank, side slope stabilization of roads, railways, agricultural lands etc.