外滩通道对下卧大直径隧道的开挖影响分析  

Analysis on Excavation Influence of the Bund Passage on Underlying Big-diameter Tunnel

作　　者：谢明[1] 姚坚[1] 孙巍[1] 

机构地区：[1]上海市政工程设计研究总院,上海市200092

出　　处：《城市道桥与防洪》2010年第2期69-73,81,共6页Urban Roads Bridges & Flood Control

摘　　要：在软土地层中开挖基坑引起的基坑隆起,导致下方已有建构筑物的变形,从而对其使用功能和安全性产生影响甚至造成严重危害。外滩通道工程跨越延安东路隧道区域,隧道内径10m,上跨基坑深10m,坑底距隧道顶最近处仅5m,工程存在较大的风险。该文通过环向隧道结构、纵向结构计算和三维有限元整体施工模拟分析了基坑开挖对隧道的影响,比较了几种保护措施的效果;此外,通过理论研究和工程比较制定了隧道的保护标准。The pit promontory caused in the excavation of foundation pit in the soft soil stratum brings on the deformation of the lower existing buildings and structures so as to produce the influence and even cause the serious harm on their use functions and safety.The Bund Passage Project spans Yan'an East Road Tunnel Area.The inner diameter of the tunnel is 10 m,the overpass pit is 10 m deep and the distance from the pit bed to the tunnel top is only 5 m at the nearest place.The project has the greater risk.The article analyzes the influence of pit excavation on the tunnel by the calculation of ring tunnel structure and vertical structure and the simulation of 3-D finite element integral construction,and compares the effects of some protective measures.In addition,the protective standards of tunnel are determined on the theoretical study and engineering comparison.

关 键 词：地下通道工程 明挖基坑 大直径隧道 影响分析 上海市 

分 类 号：U451[建筑科学—桥梁与隧道工程]