• PANKAJ PANDEY

Abstract :- Ground Improvement techniques are used to improve soil properties such as - bearing capacity, shear strength, consolidation, settlement, drainage, porosity, etc. These techniques of soil improvement have a wide range of applicability from coarse grained to fine grained soils, Soil improvement by coarse grains often called stone column technique and by fine grained is called sand column technique both are used as per side condition. Ground improvement when implemented through sand column technique is much stable solution to construction in weak cohesive soils. With the sand column I am trying to discuss in detail about improvement of soil bearing capacity and reduced its settlement, including it’s salient features, major functions through sand column, The purpose of this work is to assess the suitability of reinforcing technique by sand columns is to improve the load carrying capacity of Black cotton soil through several laboratory model tests. Objective is achieved in two parts, In the first stage the characteristic of Black cotton soil is evaluated by the index properties like compaction characteristics under particular loading conditions, evaluation of shear strength parameters using Unconfined compression test and Tri-axial test at different testing conditions, this is done basically to find out the inherent strength of the Black cotton soil compacted to different densities and at different different degree of saturation and In the second series of tests the settlement parameters of the compacted Black cotton soil samples reinforced with sand columns of varying length ratios are evaluated from California Bearing Ratio test. In addition to this sand column having different length ratios such as full and half length are introduced of 25mm in diameter on the center of mould built for testing.In this study it is found that load carrying capacity of sampled soil is increased with increases the respective length but decreased with addition of more water content from there optimum moister content.

Sand column, Specific Gravity, Liquid Limit ,Plastic Limit, OMC, MDD, CBR , Load and Settlement. I. INTRODUCTION

"“AN EXPERIMENTAL STUDY OF GROUND IMPROVEMENT TECHNIQUE BY SAND COLUMN”", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 1, page no.563-569, January-2019, Available :http://www.jetir.org/papers/JETIR1901673.pdf

"“AN EXPERIMENTAL STUDY OF GROUND IMPROVEMENT TECHNIQUE BY SAND COLUMN”", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 1, page no. pp563-569, January-2019, Available at : http://www.jetir.org/papers/JETIR1901673.pdf