The use of geosynthetics to enhance stone column performance has become increasingly prevalent in geotechnical engineering. The application of geosynthetics in stone columns has recently seen a dramatic surge. Stone columns are a ground improvement method used to enhance problematic soils by increasing load-bearing capacity, reducing settlement, improving slope stability, and lessening liquefaction potential in earthquake-prone areas. The bearing capacity of stone columns is further improved by encasing the stone column called as encased stone column. Geosynthetic materials such as geotextile, geogrid are commonly used for encasing in stone columns. Geosynthetic materials are well-suited for use as encasements due to their strong tensile properties, which prevent bulging failure in extremely soft soils with undrained shear strengths below 15 kPa. This paper presents the various types of geosynthetic materials used for encasing and how their properties affect the final performance of stone columns. Factors like encasement length, and strength and stiffness of the encasement material influence the bearing capacity and failure mechanisms of encased stone columns. Enhanced column capacity is observed with increased encasement stiffness and length.

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Geosynthetic Encased Stone Columns in Geotechnical Engineering: Performance Insights and Applications

  • Pravez Alam,
  • Shailja Bawa

摘要

The use of geosynthetics to enhance stone column performance has become increasingly prevalent in geotechnical engineering. The application of geosynthetics in stone columns has recently seen a dramatic surge. Stone columns are a ground improvement method used to enhance problematic soils by increasing load-bearing capacity, reducing settlement, improving slope stability, and lessening liquefaction potential in earthquake-prone areas. The bearing capacity of stone columns is further improved by encasing the stone column called as encased stone column. Geosynthetic materials such as geotextile, geogrid are commonly used for encasing in stone columns. Geosynthetic materials are well-suited for use as encasements due to their strong tensile properties, which prevent bulging failure in extremely soft soils with undrained shear strengths below 15 kPa. This paper presents the various types of geosynthetic materials used for encasing and how their properties affect the final performance of stone columns. Factors like encasement length, and strength and stiffness of the encasement material influence the bearing capacity and failure mechanisms of encased stone columns. Enhanced column capacity is observed with increased encasement stiffness and length.