隧道上穿既有车站结构的变形预测及安全评估  

Deformation Prediction and Risk Evaluation of the Existing Subway Station Structure with Above-Traversed Tunnel

作　　者：陶连金[1] 唐四海[1] 金亮[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100022

出　　处：《地下空间与工程学报》2008年第3期442-447,共6页Chinese Journal of Underground Space and Engineering

基　　金：北京市自然科学基金(编号:8062007);国家"十一五"科技支撑计划资助

摘　　要：利用FLAC^(3D)程序建立三维地层-结构模型来预测某拟建隧道上穿已建成但尚未运营地铁车站在施工期间引起的既有结构变形,再利用SAP2000程序,建立荷载-结构模型以叠加法计算出既有结构在初始状态下和变形条件下的结构内力,再根据既有车站结构的工程材料、结构尺寸及所配钢筋可计算出结构各部位的承载能力,将计算出的结构内力与结构承载能力进行比较,以评估既有车站的结构安全性,为隧道穿越既有车站施工时的结构安全性评估提出了新的方法。Using the three - dimensional finite - difference program FLAC3D to build a layer-structure model in the construction period of the planned tunnel, the deformation of the existing subway station structure traversed above by the tunnel is predicted and this subway station has not been used yet. Using the program SAP2000 to build a load- structure model, the structure stress of the station is calculated before and during excavation, and then the calculated stress is compared with the capacity of the existing subway station structure which is calculated taking into account the material of the project, the dimension of the station structure, and the reinforcing steel used, with an attempt to evaluate the safety of the existing structure. The approach may provide a new evaluation method for the existing underground structure caused by the construction of the over traversed tunnel.

关 键 词：数值模拟 FLAC3D 既有地铁车站 安全评估 

分 类 号：TU451[建筑科学—岩土工程] TB115[建筑科学—土工工程]