摘要
柔性桩和刚性桩各有优缺点,根据弹塑性力学的增量理论,对CFG桩体、水泥土桩体和土体采用Druker-Prager屈服准则,建立了刚柔组合桩复合地基的有限元计算模型,基于FEPG有限元自动生成系统,编制了有限元程序,并结合工程实例对刚柔组合桩复合地基的应力场、位移场和破坏规律进行了数值分析。
The flexible piles and the rigid piles have different advantages and disadvantages. Based on the optimized piles viewpoint, the flexible pile and the rigid piles are arranged in a group as compound piles, which does not only utilizes fully the merits of the flexible piles and the rigid piles but also avoids their shortcomings. Based on increment theory of elastic-plastic mechanics, a mathematical model for composite foundation with rigid -flexible compound piles is established by using Druker-Prager yield criterion for CFG pile, soil-cement pile and soil body. The finite element program is compiled by the automated generating system of the finite element of FEPG. The numerical analysis is made of an engineering example.
关键词
复合地基
刚柔组合桩
非线性
有限元
数值分析
composite foundation
rigid-flexible compound piles
non-linear
finite element method
numerical simulation
