Paper
An Investigation on the Dynamic Behaviour of Soil Nail Walls
- Authors:
- Jaya V; Annie Joy
- Abstract
- Soil nailing is one of the extensively used techniques for stabilizing cut slopes in railway and highway construction. In this method, the native soil is strengthened by placing steel rods into drilled holes in the walls and grouted. The dynamic behaviour of soil nail walls is affected by the relative density of backfill, the length and diameter of nails, axial force, shear force and bending moment developed along the nails. Laboratory plate load tests were performed on a soil nail wall model of 1 m height having vertical facing with relative densities of 25% and 50% and two nail lengths of 0.5 m and 0.6 m to study the effect of relative density of soil and length of nails on stability of soil nail wall. A detailed finite element analysis was carried out on soil nail wall model having 1 m height and vertical facing in order to determine the axial force, shear force and bending moment developed along nails. The settlement of the soil nail wall was decreased with the increase in relative density of sand. The increase in length of nail from 0.5 m to 0.6 m resulted in decrease of settlement for the soil nail wall having 1 m heght. The axial force along nails increased with the embedment depth. Both the bending moment and shear force were found to be concentrated near the face of the wall. A parametric study was also carried out and design tables were prepared for various earthquake coefficients.
- Keywords
- Soil Nail Walls; Factor of Safety; Relative Density; Settlement
- StartPage
- 241
- EndPage
- 249
- Doi