盾构出洞冻结加固拱棚结构的力学模型分析  

Mechanical models of the arch shed structure of soil freezing reinforcement for a shield starting from launching pit

作　　者：朱学银[1] 岳丰田[1] 张勇[1] 

机构地区：[1]中国矿业大学建筑工程学院,徐州221008

出　　处：《现代隧道技术》2008年第1期35-38,共4页Modern Tunnelling Technology

摘　　要：将盾构出洞冻结法加固拱棚结构简化为单心固定无铰拱和直墙拱两种计算模型,利用实例工程对结构进行内力计算和验算,比较安全系数,并与实例工程实测压力结果对比,表明直墙拱模型是较为接近实际冻结壁结构的一种可行简化计算模型,为类似工程设计提供参考。Arch shed structure of soil freezing reinforcement for a shield to break through the launching pit wall is simplified into two computation models： fixed-end circular arch with single centre and arch supported on vertical walls. A practical engineering project is taken for example to carry out the computation of internal forces and to check safety factors of the structure, and the calculated internal forces are compared with the results acquired by in-situ measurement. Results indicated that the computation model of arch supported on vertical walls is more resemble to the actual structure of soil freezing and it can be taken for reference by the design of similar projects.

关 键 词：盾构 冻结加固 拱棚结构 力学模型 

分 类 号：U453.1[建筑科学—桥梁与隧道工程] U455.49[交通运输工程—道路与铁道工程]