Numerical simulation of deformation characteristics of supporting structure of deep foundation pits
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摘要: 综合考虑深基坑支挡结构-内支撑结构-土体空间整体协同作用,采用线弹性有限元计算方法,对武汉市永清商务综合区A5地块深基坑的地下连续墙和环撑实际开挖情况进行数值计算,模拟深基坑施工中开挖、加撑、拆撑全过程的位移与内力的变化情况,将计算结果与实际开挖监测资料结果进行分析对比,总结地下连续墙+环撑支护方式在基坑开挖过程中的变形特征,为进一步优化设计提供技术支撑。Abstract: Considering the interaction of retaining structure, internal bracing structures and soil space of deep excavation, actual excavation of diaphragm wall and ring support of deep pit in A5 block in Yongqing Commercial District of Wuhan City is numerically calculated using the linear elastic finite element method. Changes of displacements and internal forces during excavation, adding support and removing support in the construction of deep foundation pit are simulated. The calculated results and the actual excavation monitoring data are analyzed and compared. The characteristics of the excavation process by means of diaphragm wall and ring support are summarized. It may provide technical support for further optimization.
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Keywords:
- diaphragm wall /
- circular inner support /
- 3D FEA /
- numerical simulation /
- deformation monitoring
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