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Performance of Clay Soil with Different Materials in Stone Column

Pa. Suriya, S. Praveen, J. Ponkarthi and Nemalipuri Kirankumar

In the advancement of ground improvement technique, stone column are broadly used in the poor grounded soil to increase the bearing capacity. The stone column technique is a very efficient method of improving the strength parameters and reducing primary consolidation settlement. It offers a much economical and sustainable alternative to piling and deep foundation solutions. The strength of the ordinary stone column could be improved by encasing the with suitable geogrid material. The encased stone column is increases the rate of consolidation when compared to the ordinary granular fills. The load bearing capacity of the soil is increases with no of columns increases with proper spacing, the lateral spreading of stone column can be arrested by providing encasement with geogrids. The main objective is to determine the most effective material that can be used for stone column construction and to compare the suitability of grain size of the materials. The maximum load taken by quarry dust encased with geogrid is 2.18 kN at 20 mm settlement than the gravel of similar type. Probably the load carrying capacity of the soil is increased by 50% through encased three stone columns of quarry dust then untreated clay.