西安地铁区间隧道交叉中隔墙(CRD)工法施工变形监测与分析  

Monitoring and Analysis of Running Tunnel Deformation with CRD Method on Xi'an Metro

作　　者：谷拴成[1] 王兵强[1] 

机构地区：[1]西安科技大学建筑与土木工程学院,西安教授710054

出　　处：《城市轨道交通研究》2014年第8期83-86,94,共5页Urban Mass Transit

基　　金：陕西省教育厅科学研究项目(2013JK0961)

摘　　要：以西安地铁3号线区间隧道为工程背景,利用收敛计三角形量测法原理,对隧道交叉中隔墙(CRD)工法施工进行现场监控量测,分析隧道的变形规律。研究结果表明:该隧道CRD工法施工监控量测应以拱顶沉降为主,水平收敛为辅;拱顶沉降趋势为最后趋于一稳定值的台阶状上升曲线,各分部开挖引起的拱顶沉降增量呈一定的比例关系,进而提出了西安地铁区间隧道CRD工法施工相邻导坑掌子面的合理间距,各导坑正常段和极软弱地段循环开挖距离以及导坑内台阶的合理长度,对控制最终沉降和保证支护结构稳定具有一定的指导和借鉴意义。With the engineering of Xi ＇an metro Line 3 tunnel as the background,and according to the principle of convergence gauge triangle measuring method,CRD method for tunnel construction is surveyed on-site,the deformation law of the tunnel is analyzed.The research shows that the supervision of CRD method in tunnel construction should give priority to vault subsidence,while taling the horizontal convergence as the complementary factor.Vault subsidence trend will finally tend to reach a stable value rising curve,the steps of each division excavation incremental vault subsidence are caused by a certain proportion,thus the reasonable spacing of the constraints on Xi ＇an subway tunnel adjacent a pilot tunnel constructed by CRD method is put forward,the normal period of pilot tunnel,the extremely weak section of cycle excavation distance and reasonable length of the gate in the steps are studied to control the final settlement and guarantee the stability of supporting structure.This research has a certain guidance and reference significance.

关 键 词：隧道开挖 交叉中隔墙工法 监控量测 拱顶沉降 

分 类 号：U456.31[建筑科学—桥梁与隧道工程]