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以大连市某地下通道工程监测项目为背景,通过对该地下通道横向地表沉降曲线、纵向地表沉降曲线以及洞周收敛和拱顶位移曲线的数据分析,验证在城市主干道下进行地下通道施工地表沉降对隧道围岩稳定性的控制作用。同时应用FLAC数值软件,采用平面应变模型对南侧施工段XS-2#断面的不同施工阶段进行数值模拟分析,得出考虑应力释放情况下不同施工阶段对路面沉降的影响曲线,与现场实测结果基本吻合,对相似地质条件的地下工程设计施工具有重要意义。
Taking the monitoring project of an underground passage in Dalian as the background, through the analysis of the data of lateral subsidence curve, longitudinal subsidence curve, and the convergence of the cave and the displacement curve of the dome, it is verified that the construction of the underground passage under the urban main road Control of Settlement on Stability of Surrounding Rock in Tunnels. At the same time, the FLAC numerical software was used to simulate the different construction stages of the XS-2 # section in the south construction section by using the plane strain model. The influence curve of the different construction stages on the road surface settlement was obtained considering the stress release, Basically consistent with the similar geological conditions of underground engineering design and construction of great significance.