路堤下复合地基沉降影响因素有限元分析

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FINITE ELEMENT ANALYSIS OF FACTORS INFLUENCING COMPOSITE FOUNDATION SETTLEMENT UNDER EMBANKMENT

1.
1. Department of Geotechnical Engineering,China Institute of Water Resources and Hydropower Research Beijing 100044;
2.
2. Institute of Geotechnical Engineering,Zhejiang University Hangzhou 310027

摘要: 由于路堤下复合地基中设置了桩体，不能直接按平面问题处理。通过典型段法，对路堤下复合地基沉降影响因素进行了三维有限元分析，避开了对桩体有不合理假设的平面应变分析法。采用ABAQUS程序，分析了路堤荷载作用下复合地基加固区和下卧层压缩量归一化值的变化规律。
- 路堤口 /
- 典型段法 /
- 复合地基沉降 /
- 三维有限元分析
Abstract: Since piles are set into a composite foundation under an embankment, it can not be directly analyzed in the plane strain way . To analyze the factors influencing its settlement, a representative segment method is developed and 3-D analysis of composite foundation settlement under embankment is done. Compared with the traditional plane strain method that needs to unreasonably suppose the piles as walls, the representative segment method is more reasonable. The changing law of the normalized compressive deformation of stabilized layer and sub- layer of a composite foundation under an embankment is finally analyzed by FEM and ABAQUS program.
- embankment /
- representative segment method /
- composite foundation settlement /
- 3-D FEM