This paper presents an analytical approach to predict the behaviours of geosynthetic-encased stone column (GESC)-supported embankments. The soil arching in the embankment and the nonlinear behaviours of stone columns are considered. Based on nonlinear elastic and elastoplastic constitutive models of stone columns, the nonlinear behaviours of GESCs, including settlement and radial deformation, are analysed. The deformations of GESCs, the surrounding soil, and the overlying embankment fill are compatible by applying stress continuity and volume deformation continuity at the bottom of the embankment fill. This method is verified via comparison with literature data and numerical analysis. The influences of parameters of the GESC, including encasement stiffness and column friction, on the performance of the embankment are investigated. Without considering the nonlinear behaviours of the column, the column-soil stress ratio is overestimated. It is more appropriate that the nonlinear characters of the column be considered in the analysis of GESC-supported embankments.

本文提出了一种分析方法来预测土工合成材料包裹的石柱 (GESC) 支持的路堤的行为。考虑了路堤土拱和石柱的非线性行为。基于石柱的非线性弹性和弹塑性本构模型，分析了GESC的非线性行为，包括沉降和径向变形。通过在路堤填料底部应用应力连续性和体积变形连续性，GESCs、周围土壤和上覆路堤填料的变形是兼容的。该方法通过与文献数据对比和数值分析得到验证。研究了GESC参数对路堤性能的影响，包括围护刚度和柱摩擦。在不考虑柱的非线性行为的情况下，柱土应力比被高估了。在GESC支护路堤分析中考虑柱的非线性特性更为合适。