土工合成材料加筋软基路堤的有限元分析

研究了厚软基与薄软基条件下 ,土工合成材料加筋软基路堤的不同加筋效果 ,并编制了非线性有限元程序 ,提出了软基厚度是影响土工合成材料加筋效果的重要因素 .利用所编制的有限元程序计算了一组对照路堤 ,并从地基的水平位移、竖向位移、应力水平及剪应力等角度对深厚软土基及浅薄软土基情况进行了对比分析 ,探讨了软基厚度对加筋效果的影响 ,揭示了不同软基厚度条件下土工合成材料的加筋效果的巨大差异 ,得出了土工合成材料加筋加固软基的若干机理和规律 ,可用于指导实践

ANALYSIS OF GEOSYNTHETICS REINFORCED EMBANKMENT ON SOFT SOIL BY FEM

The reinforcement effects of geosynthetics in thick soft subsoil case and thin soft subsoil case are studied in this paper,and a Duncan Chang nonlinear numerical model based on the finite element method (FEM) is developed.Moreover,an important conclusion that the thickness of soft subsoil affects greatly the geotechnical behavior of geosynthetic reinforced embankments is drawn.A series of embankment built on soft subsoil is calculated using the FEM program.The results of the computer program,such as the lateral displacements,settlements,and stress level and shear stresses in the subsoil,are presented in great detail and the comparison of those results disposes clearly the huge discrepancy of reinforce benefit between the thick subsoil embankment and thin subsoil embankment.Reinforcement mechanism of geosynthetics is also discussed in this paper and several conclusions are reached.This paper also gives recommendations for design.