The Analysis of Three-dimensional Numerical Simulation to Complexity Foundation Pit Supporting System

For the interchange foundation pit engineering of the Guangzhou No. 3 and No. 6 metro line, using three-dimensional elastic-plastic finite element method to build the overall modeling and to simulate the whole process of the excavation, and the calculation and analysis were made. The computation results show that: (1) the space effects of the foundation pit are very obvious. (2) Using the method to calculate the foundation pit, the calculating results and excavation site monitoring results are identical in the two perspectives of lateral deformation and strut axial forces. So using this calculation method to calculate the foundation pit is completely feasible. (3) calculated and analyzed the deformation of the foundation pit, some relevant advice were put forward, to expect to have a certain reference values for the advanced decision-making and hysteretic effect analysis of the project.