地铁隧道施工会引起地表沉降, 对地面环境产生影响. 当地面存在建筑物时, 会引起建筑物的变形. 以青岛地铁隧道下穿某建筑物为例, 利用施工过程中监测到的地表沉降数据, 借助随机介质理论和 Peck 方法反分析地表移动参数, 研究了地表沉降规律, 并在隧道下穿建筑物时进行地表沉降预测; 通过有限元软件 ANSYS 建立了研究对象建筑物的三维有限元模型, 并进行了数值分析. 研究结果揭示了隧道施工对钢筋混凝土框架-剪力墙结构沉降变形的影响规律.

The subway tunnel excavation will cause ground surface subsidence and influence the ground surface environment. When there are buildings on the ground surface, it will cause the deformation of the building. This paper takes an example a building in Qingdao which is passed through by the subway tunnel. Using the data of surface subsidence collected in the construction process, it attempts to analyze reversely the surface movement parameters and address the settlement of the ground surface by means of the stochastic medium theory and the Peck method. In the meantime, attempt has been made to use the parameters to predict the surface subsidence under the building. A three-dimensional finite element model of the research object (the building) has been developed through the finite element software ANSYS. Research results indicate that the impact tunnel construction has on reinforced concrete frame shear wall structure deformation follows certain rules.