中文摘要：

为了分析深基坑与地铁车站共用地下连续墙影响下车站和隧道连接节点的变形特性,保护地铁线路运营的整体安全,通过现场测试和数值模拟展开研究。根据上海地区深基坑与地铁车站共用地下连续墙工程实例的现场测试数据,分析了开挖施工过程中车站与地铁盾构隧道的竖向位移分布特征,并采用三维数值模型研究了共用地下连续墙深基坑开挖深度、相对位置对车站与隧道节点变形的影响,探讨了车站与隧道节点的曲率半径、相对弯曲的发展变化规律,并判断其安全状态。测试结果与数值分析均表明,车站与隧道节点变形比隧道最大沉降处更加不利;节点的曲率半径随基坑开挖深度的增加而减小,相对弯曲随基坑开挖深度的增加而增加;基坑与车站完全共用地下连续墙或远离隧道时,节点处的曲率半径相对较大。

英文摘要：

Study is made on site testing and numerical simulation,so as to guarantee the safety of the running Metro line and to analyze the deformation behaviors of Metro station and joint between shield tunnel and Metro station under the condition of communal underground diaphragm wall between deep foundation pit and Metro station in Shanghai area. The vertical displacements of Metro station and shield tunnel are analyzed. The influence of excavation depth and relative position of foundation pit on Metro station and joint between shield tunnel and Metro station are analyzed by means of 3D numerical model. The behaviors of curvature radius and relative bending of joint between shield tunnel and Metro station are discussed; and the safety of the joint between shield tunnel and Metro station is estimated. The testing results and numerical simulation results show that： 1） The deformation of joint between shield tunnel and Metro station is serious.2） The curvature radius of joint between shield tunnel and Metro station decreases with the excavation depth of foundation pit increases; and the relative bending increases with the excavation depth of foundation pit increases. 3） The curvature radius of joint between shield tunnel and Metro station at the total connection section between Metro station and foundation pit is large.