连拱隧道拱顶沉降数值分析  

Numerical analysis on the top subsidengce of double-arch tunnel

作　　者：肖林萍[1] 李永树[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《测绘工程》2008年第5期16-18,共3页Engineering of Surveying and Mapping

基　　金：广东省科技项目(200514)

摘　　要：在隧道施工过程中,根据现场围岩变形的监测结果,可以及时分析与预测围岩稳定性。结合小金口连拱隧道监测数据,利用数值分析方法对Ⅲ类围岩拱顶沉降位移监测数据进行处理与分析,计算得出:采用Boltzman函数拟合分析方法,能够较好地反映连拱隧道施工过程中拱顶的沉降变化情况,并得到连拱隧道拱顶沉降的控制标准。According to result of monitored and measured surrounding rock deformation, stability of surrounding rock is analyzed and predicted in the construction of the tunnel. Arch-top subsidence is calculated and analyzed in surrounding rock types Ⅲ by monitored and measured data of XIAOJINKOU double-arch tunnel in the paper. Regression analysis by Boltzman function can reflect the change of arch-top subsidence in double-arch tunnel construction. So arch-top subsidence control base of double-arch tunnel has been suggested.

关 键 词：连拱隧道 拱顶沉降 围岩变形 控制标准 

分 类 号：U459.2[建筑科学—桥梁与隧道工程]