Abstract This paper explores the potential use of a woven polypropylene textile for encapsulating stone columns and improving performance of a local soft soil in Warangal city of India. A series of axial load tests were performed on stone columns of various diameters and under various encapsulation conditions that include single and double layers and other combinations. Load carrying capacity of stone column increased twice its original capacity when encapsulated with different geofabric materials. Performance enhancement strongly correlated to the tensile strength of encasement material and encapsulation condition. In addition, the influence of lateral thrust on group of stone columns arranged in square and triangular patterns were investigated. Irrespective of the material used, lateral displacement reduced by half for encased stone columns. Apart from tensile strength of encasing material, the amount of material used for encasement in the form of additional encasement layer was found to be crucial. The cost of using the polypropylene encasing material is only a third of the commercial geotextiles; however, the performance is inferior to woven geotextiles but far superior to non-woven geotextiles.

中文翻译：

---

聚丙烯织物包覆石柱的性能

摘要 本文探讨了编织聚丙烯纺织品在印度瓦朗加尔市用于封装石柱和改善当地软土性能的潜在用途。在包括单层和双层以及其他组合在内的各种封装条件下，对各种直径的石柱进行了一系列轴向载荷试验。用不同的土工布材料封装后，石柱的承载能力提高了原来的两倍。性能增强与封装材料的拉伸强度和封装条件密切相关。此外，还研究了横向推力对方形和三角形排列的石柱群的影响。无论使用何种材料，包裹石柱的横向位移都减少了一半。除了包覆材料的抗拉强度外，用于包覆材料的额外包覆层形式的材料量也很关键。使用聚丙烯包裹材料的成本仅为商业土工布的三分之一；但性能不如机织土工布，但远优于非织造土工布。