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.
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
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
underground passage project,excavation of pit,big-diameter tunnel,influence analysis,Shanghai
