STUDY ON IMPROVEMENT OF STABILITY OF RETAINING WALL REINFORCED WITH GEOGRID

Abstract

Mechanically stabilized earth (MSE) retaining wall is a distinctive structure which is used extensively in the recent days. Generally, there are various types of soil reinforcement can be used in mechanically stabilized earth retaining wall. Steel strip, welded steel grid, wire mesh, geogrids, and geotextile sheets are examples of modern soil-reinforcing elements. The adoption of a facing system minimizes soil erosion between reinforcing parts and enables for the safe construction of steep slopes and steep walls. Since the early 1970s, geosynthetic materials are produced and then used as reinforcement material in soil retaining structures. Geosynthetics have been increasingly popular in reinforced soil constructions, and they currently account for a considerable percentage of reinforced soil industry. Technological advances in the polymer sector have been regularly comprised into new geosynthetic products, improving the qualities of geosynthetic materials used in geotechnical applications. Geogrid is one of the main products of geosynthetic materials. Tieback anchors are developed to reach the optimum rigidity achievable within financial constraints in order to limit wall displacement and ground settlement. Horizontal deflection, vertical deflection and factor of safety under the effect of various stiffness of geogrids are studied. Geogrids are applied into varying height of wall too. Tie back anchor is coupled with geogrid and the effect on reducing horizontal deflection has been studied. The length of geogrid and the surcharge load are taken constant and comparison has been drawn between with and without geogrid structure. Significant improvement of stability of structure is shown after application of geogrid. While collaborating with tie anchors it gives better result in controlling horizontal deflection of structures. The combination of geogrid and soil effectively enhances the deformation of the retaining wall structure and the overall stability.