分析基坑开挖对其下卧隧道、管线变形的影响  

Analysis on Influence of the Foundation Pit Excavation on the Deformation of Subjacent Tunnels and Pipelines

作　　者：姚燕明[1] 杨金刚 王哲 

机构地区：[1]宁波市轨道交通工程建设指挥部,浙江宁波315000 [2]中铁二院集团有限公司,杭州310004

出　　处：《地下空间与工程学报》2013年第S2期2029-2033,共5页Chinese Journal of Underground Space and Engineering

摘　　要：随着地下空间开发利用越来越深,现在出现了许多空间上下重叠建设的保护问题。在城市中由于已建隧道和管线埋设越来越深,新建工程与其交叉,在上部开挖过程中需要保证隧道和管线的竖向隆起安全。如何根据基坑的开挖深度、地层加固条件、坑底与管线的竖向间距等预测基坑开挖过程中下卧盾构区间隧道、管线等的变形越来越重要。本文根据残余应力法的原理,利用分层回弹总和法,计算基坑开挖引起下卧隧道及管线变形,并利用此方法计算分析了两个宁波轨道交通建设过程中遇到的工程实例,对今后类似工程具有一定的参考意义。The problems about the protection of the overlapping structures have been appeared as the underground structures are used more extensively. In cities,with the tunnels and pipelines built more deeply many new structures are built above the existing tunnels and pipelines. To ensure the safety of the municipal engineering during the excavation of the pit is necessary. It has been increasingly important how to predict the deformation of the underground shield tunnels and pipelines when a foundation pit is excavated above,according to the excavation depth,soil reinforcement and vertical spacing. Based on residual stress method and layered rebound summation method,the method is proposed to predict the deformation of the subjacent shield tunnels and pipelines. Two actual projects of metro construction in Ningbo City are analyzed by the method. The results can provide a reference for the similar projects in the future.

关 键 词：残余应力 基坑 区间隧道 管线 变形 

分 类 号：TU470[建筑科学—结构工程]