黄土深基坑变形的数值计算与分析

主要研究陕西咸阳化工有限责任公司60万吨/年卸煤基坑变形监测与分析。对基坑变形分析,是利用有限元法,通过大型有限元程序PLAXIS7.0进行模拟基坑的变形。将所研究问题假设为平面应变问题,对土体采用Mohr-Coulomb弹塑性模型,对基坑进行有限元网格划分,模拟基坑支护结构,模拟基坑分步开挖,最后计算得出基坑的变形情况。

This paper studies the monitoring and analysis ofthe deformation of 600,000 t/per year coal unloader pit of Xianyang in Shartxi Chemical Co., Ltd. By the use of finite element method,the deformation of the pit is analyzed with_large-scale finite element program, PLAXIS7.0, which is used to simulate pit deformation. The problem examined here is assumed as the plane strain. The- Mohr-Conlomb elastoplastic model is used for the soil. The foundation of finite element mesh, simulating the support structure of pit, step-by-step simulation of excavation pit. Finally, the deformation of excavation is calculated.