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人行过街通道施工不可避免对周边环境造成不利的影响,通过对隧道开挖施工过程的研究分析,对施工安全具有重要的工程指导意义。应用Midas GTS建立浅埋暗挖施工的三维数值模型,模拟浅埋暗挖台阶法开挖施工过程,分析开挖工程中拱顶沉降和地表沉降情况。结果表明:上台阶开挖对地表沉降量影响较大,及时支护可以很好的控制地表沉降;交通荷载作用下的地表沉降和拱顶沉降会影响工程的安全施工,数值模拟对施工过程和安全有指导作用。
People crossing the street construction inevitably have an adverse impact on the surrounding environment. Through the research and analysis of tunnel excavation construction process, it has important engineering guiding significance for construction safety. The Midas GTS is used to establish the three-dimensional numerical model for the construction of shallow burying and undercutting to simulate the construction process of shallow excavation and excavation step method, and to analyze the settlement and surface settlement of vault in excavation. The results show that the excavation on the upper terrace has a great influence on the settlement of the ground, and the timely support can control the settlement of the ground surface. The ground settlement and the settlement of the vault under the traffic load will affect the safety construction of the project. Numerical simulation of the construction process and Security has a guiding role.