STERENGTHENING OF EXPANSIVE SOIL TO REDUCE SETTLEMENT

Smita G.M, Vishwanath C.S

Abstract: Stabilization is the main aim, to reduce the bearing capacity of expansive soil by using coated yarn geogrid. The supporting power of a soil or rock is referred to as its bearing capacity. Reinforced earth is a composite material, a combination of soil and reinforcement suitably placed in layers to resist tensile stresses. In case of soft soils geogrid is one which redistributes the stresses internally with locally available backfill materials. Ground improvement technique using geosynthetic material i.e. geogrid is done below foundation .Using this technique; we can improve stability of available expansive soil, and increase the load bearing capacity. With this it also controls the earthquake vibrating forces. Reinforcement of soil to improve the ground (weak soil) using a polymeric geosynthetic material i.e. coated yarn geogrid is applied below a square footing. To reduce the foundation settlement, bearing capacity of soil increased. This can also be implemented to many such weak places as road, railway ballast, airways, slopes, tunnels, etc. in various ways. Geotechnical engineers often deals with the soil bearing capacity and compaction quality of soils and non-cohesive sub-bases, as well as for soil improvement applications. Built-in soil layers can easily be tested without load abutment, facilitating quick assessments of test lots even under limited space conditions. Strengthening is carried out and the results of this method is measured and tabulated. The test results indicate that the soil reinforced by gogrid is very much effective to increase the load bearing capacity of soft soil

Keywords: soil reinforcement, bearing capacity, geosynthetics, geogrid, expansive soil, settlement, foundation

DOI: https://doi.org/10.15623/ijret.2014.0315115