浅埋暗挖原理在西部某隧道冒顶塌方治理中的应用  

Principles of the Shallow Bored Tunnel Method Applied to Chimney Collapse Treatment for a Tunnel in Western China

作　　者：邹金杰[1] 顾鑫杰[1] 章立峰[1] 胡贤国[1] 

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,杭州310014

出　　处：《现代隧道技术》2016年第2期202-206,共5页Modern Tunnelling Technology

摘　　要：西部某山岭隧道地质条件差、埋深浅且偏压,因违规施工、乱用工法而造成隧道冒顶塌方。在处理过程中,根据"浅埋暗挖法"的基本原理,对松散体进行表面封闭,并采用小导管前进式分段注浆超前加固;结合"加固后方、封闭岩面、稳定塌体"的塌方处理原则,对未塌方段预先采用钢拱架和长锚杆加固防止事故扩大,对塌方段采用"上下台阶预留核心土法"进行环向开挖,并采用"小间距型钢拱架"加强支护措施。经过数值模拟计算和现场监控数据反馈,各项治理措施有效合理,可为今后类似工程的处理提供一些经验和参考。A mountain tunnel in western China that is subject to poor geological conditions, shallow buried depthand unsymmetrical pressure encountered a chimney collapse event caused by inappropriate construction and an un-reasonable construction method. During the remediation process, surface sealing was used for loose masses, and ad-vanced reinforcement was also adopted using the forward segmented condulet grouting technique based on the＂shal-low-buried bored excavation method＂. According to the collapse treatment principle of＂reinforcing the back non-collapsed section, sealing the rock surface and stabilizing the collapsed rock masses,＂steel arches and long anchorbolts were used to reinforce the non-collapsed section to prevent the expansion of the accident. For the collapsedsections, the up-and-down bench ＋ reserved core-soil method was used for ring excavation while heavy supportwas implemented with small-spacing steel arches. According to the feedback of numerical simulation and on-sitemonitoring data, all the treatment measures are rational and effective and may provide a reference for treatment insimilar projects.

关 键 词：隧道 浅埋暗挖 塌方治理 注浆加固 

分 类 号：U458.3[建筑科学—桥梁与隧道工程]