混合桩型复合地基工程性状的近似解法 English Version
An approximate approach for the analysis of composite foundation with hybrid piles
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摘要: 基于虚拟桩模型,采用积分方程法对混合桩型复合地基进行分析,以Winkler 分布弹簧模拟垫层的作用,建立求解所需的第二类Fredholm 积分方程组,通过数值计算得到包括垫层压缩量、桩土的荷载分担、沿桩身的荷载传递特性以及地基土应力分布等主要性状,与有限元解答和试验结果的对比验证了本文方法的正确性,最后还考察了桩长对复合地基性状的影响。本文方法能够适应实际工程中对混合桩型复合地基性状分析的要求。Abstract: Based on imaginary piles model, integral equation approach was applied to analyze composite foundation with hybrid piles. By simulating the cushion with the Winkler spring, the effect of cushion was taken into consideration, and then the second kind of Fedholm’s equations were deduced to solve the problems. Using the numerical calculation, compression of cushion, loads shared by piles and subsoil, load transfer characters and stress distribution of subsoil were obtained. Comparison with the finite element method and experiment results verified the accuracy of the present calculation method. Finally, the influences of pile length on the working behavior of the foundation were studied. The present method is suitable to analysis the foundation under working loads.
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Keywords:
- hybrid piles /
- composite foundation /
- cushion /
- integral equation /
- working behavior
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