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    题名: Laboratory tests on geosynthetic-encapsulated sand columns
    作者: Wu, Cho-sen;Hong, Yung-shan
    贡献者: 淡江大學土木工程學系
    关键词: Sand column;Triaxial compression test;Geotextile;Encapsulated;Inspired confining pressure;Radial strain reduction
    日期: 2009-04
    上传时间: 2010-08-09 17:57:15 (UTC+8)
    出版者: Elsevier
    摘要: Granular columns have been introduced into engineering practice to improve the bearing capacity and reduce settlement of sand column in a weak or soft soil. The improvement can be enhanced by encapsulating the column with tensile resistant material. The improvement depends on the confinement offered by the surrounding soil, the reinforcing material and the granular column material. In this study, the extent of improvement for a sand column subjected to constant confining pressures is studied through laboratory experiments. A series of triaxial compression tests were carried out in laboratory to investigate the response of sand columns encapsulated by geotextiles. The tests consisted of triaxial compression tests on sand columns with two different densities and encapsulated by sleeves fabricated from three different geotextiles. The increase in deviatoric stress, the reductions in volumetric and radial strains, and the increase in confining pressure generated by the encapsulating reinforcement were measured and analyzed. The mobilized pseudo-cohesion and friction angle corresponding to various axial strains are analyzed to interpret the reinforcing effect. The experimental results are compared with data obtained from analytical method reported in the literature.
    關聯: Geotextiles and Geomembranes 27(2), pp.107-120
    DOI: 10.1016/j.geotexmem.2008.09.003
    显示于类别:[土木工程學系暨研究所] 期刊論文


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