大跨度公路隧道塌方处治分析  

Analysis on Collapse Treatment of a Long Span Highway Tunnel

作　　者：李书龙 徐毅 Li Shulong;Xu Yi(Beijing General Municipal Engineering Design&Research Institute Co.,Ltd.Shenzhen Branch,Shenzhen 518000,China)

机构地区：[1]北京市市政工程设计研究总院有限公司深圳分院,广东深圳518000

出　　处：《市政技术》2021年第10期107-112,共6页Journal of Municipal Technology

摘　　要：通过对某大跨度公路隧道发生塌方时各工作面工作状态进行分析,得出了导致塌方的主要是不利的地质情况、偏弱的初期支护和不合理的施工工序。提出了对地表、洞内综合处治的方案,采取了注浆加固、超前支护加强、初期支护加强、二衬结构加强等工程措施。并针对二衬结构进行了承载力和刚度验算,同时结合监测数据对处理过程进行了分析。By analyzing each working status when collapse happened in a large span highway bridge,a conclusion that the main reasons of collapse are adverse geological condition,weak primary lining,and inappropriate construction procedure has been drew.A comprehensive treatment approach for surface and tunnel is proposed which includes grouting reinforcement,extra advanced support,strengthened primary and secondary lining.Calculation of bearing capacity and stiffness of the secondary lining are checked.Combined with monitored data,the procedure of collapse treatment is recorded and analyzed.

关 键 词：公路隧道 大跨度 塌方处治 原因分析 结构计算 

分 类 号：U458.3[建筑科学—桥梁与隧道工程]