超大直径盾构法隧道工作井结构设计及实践

Structure Design and Practice of Working Shaft of Super Large Diameter Shield Tunnel

超大直径盾构法隧道的工作井具有平面尺寸大、基坑挖深深、不同阶段的空间需求迥异和计算工况复杂等特点。以上海沿江通道越江隧道工程浦东工作井为例,介绍了工作井的围护结构和内部结构设计,采用平面模型和大型有限元空间模型对结构的各个阶段进行了计算对比分析,比较了围护结构的实测数据和理论值的差异,提出了超大直径盾构法隧道工作井结构设计的系统方法。

The working shaft of super large diameter shield tunnel has the characteristics of large plane size,deep excavation,different space requirements in different stages and complex calculation conditions.Taking Pudong working shaft of Shanghai Yanjiang Tunnel as an example,the design of the retaining structure and internal structure of the working shaft is introduced.The plane model and large-scale spatial finite element model are used to calculate and analyze the structure in the various stages.The difference between the measured data and the theoretical value of the retaining structure is compared,and the systematic method for the design of working shaft structure of super diameter shield tunnel is proposed.