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既有建筑物的存在,不仅改变了地表沉降槽的形式,而且极大地减小了相关测点的水平位移。采用应力路径法,对隧道施工导致土体扰动情况进行了分析。虽然隧道施工引起土体应力释放并导致土体变形,但在隧道施工过后,隧道周边各区域土单元体在p-q应力空间内的应力状态以向远离土体破坏线的区域发展为主。施工过程中进行全程监测,计算结果与监测结果吻合较好。
The existing buildings not only changed the form of surface sedimentation tank, but also greatly reduced the horizontal displacements of relevant measuring points. The stress path method was used to analyze the soil disturbance caused by tunnel construction. Although the tunnel construction causes soil stress release and soil deformation, the stress state in the p-q stress space of the soil surrounding the tunnel around the tunnel is mainly developed in the area far away from the soil damage line after the tunnel construction. The whole process of monitoring the construction process, the calculated results and monitoring results are in good agreement.