浅谈浅埋偏压小净距隧道加固措施  

Discussion on Reinforcement Measures of Shallow Buried Unsymmetrical Pressure Small Clear Distance Tunnel

作　　者：陈光杨 费维水[1] 刘文连[1] 宁晓骏[1] 李扬[1] 汪伟伟 CHEN Guangyang;FEI Weishui;LIU Wenlian;NING Xiaojun;LI Yang;WANG Weiwei(Kunming University of Science and Technology,Kunming 650000)

机构地区：[1]昆明理工大学,昆明650000

出　　处：《工业安全与环保》2020年第11期56-59,101,共5页Industrial Safety and Environmental Protection

摘　　要：为能更好地确定某种加固方式下,对改善隧道偏压和地表沉降量的贡献,本文以重庆某浅埋暗挖火凤山隧道为依托,运用数值模拟分析的方法,研究在不同加固方式下,隧道施工引起的拱顶沉降、地表沉降、水平收敛、衬砌内力等的变化规律。研究结果表明:不同加固方法下,拱顶沉降、地表沉降、水平收敛变形量和衬砌内力存在较大的差异,对于火凤山特殊隧道来说,采用顶部小导管和侧部小导管加固方法既能有效地降低上部土体沉降,又能改善隧道偏压,还对衬砌结构受力更加安全。In order to better determine the contribution of a certain reinforcement method to the improvement of tunnel bias and surface settlement,based on a shallow buried and excavated Huofengshan tunnel in Chongqing,this paper uses a numerical simulation analysis method to study the law of arch settlement,surface settlement,horizontal convergence and internal force of lining caused by tunnel construction under different reinforcement methods.The results show that,under different reinforcement methods,there is a big difference between the arch settlement,the surface settlement,the horizontal convergence deformation and the internal force of the lining.For the special tunnel of Huofengshan,the reinforcement method of small pipe at the top and the side can not only effectively reduce the settlement of the upper soil,but also improve the tunnel bias and make the lining structure safer.

关 键 词：偏压隧道 数值分析 CRD法 地表沉降 

分 类 号：U457.3[建筑科学—桥梁与隧道工程]