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在地铁车站深基坑的设计中,由于基坑长度远远大于其宽度和深度,因此从力学角度看,采用二维平面应变进行受力分析是可行和偏于安全的。在数值模拟过程中,考虑了结构和土体的相互作用,采用摩擦单元模拟墙体和土体的接触面的性质,并模拟基坑的开挖过程,得到土体和支护结构随着基坑开挖的位移和受力的变化情况,从而为设计、信息化施工提供可靠的依据。
In the design of deep foundation pit of metro station, since the length of the excavation is far greater than its width and depth, it is feasible and biased to analyze the bearing force by two-dimensional plane strain from mechanics point of view. In the process of numerical simulation, the interaction between structure and soil is taken into account. The friction element is used to simulate the nature of the contact surface between wall and soil, and the excavation process of foundation pit is simulated. Pit excavation of the displacement and force changes, so as to design, information technology to provide a reliable basis.