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借助ANSYS对一段隧道进行分步开挖模拟。采用ANSYS软件的生死单元控制和更换材料模拟开挖和衬砌,求解出了地层位移和地表沉降,通过对比各开挖步下的地表沉降可以看出地表沉降在盾构推进过程中的变化过程。同时还计算出了管片的主应力,计算出基于莫尔强度理论的相当应力,并对管片是否破坏进行判断。
Stepwise excavation simulation of a section of tunnel with ANSYS. The displacement and surface subsidence of the ground are solved by the control and replacement of materials by the dead and the dead of ANSYS software to simulate excavation and lining. The surface subsidence during the excavation can be seen by comparing the surface subsidence under each excavation step. At the same time, the main stress of the pipe is also calculated, the equivalent stress based on the theory of Mohr strength is calculated, and the judgment of whether the pipe is damaged or not is made.