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通过对六寨至河池高速公路巴怀隧道特大塌方的成因机制、形成过程的分析,结合该塌方段的实际地质和施工条件,阐述了公路隧道特大塌方综合处治技术和相关的防排水措施。监控结果表明:处治后塌方段拱顶下沉和周边收敛位移速度均满足公路隧道施工技术规范要求,整体已处于稳定状态,说明所采取的综合处治技术措施是有效的方法,为隧道特大塌方的安全处治提拱了成功的实践经验。
Through the analysis of the formation mechanism and formation process of the Great Collapse of Bahuai Tunnel from Liuzhai to Hechi Expressway, combining with the actual geology and construction conditions of the collapse section, the comprehensive treatment technology and the relevant drainage and drainage measures for the highway tunnel collapse are expounded. The monitoring results show that the vault sinking and surrounding convergence displacement velocity in the collapsed section of the tunnel satisfy the requirements of the technical specifications for highway tunnel construction and the whole is in a stable state, indicating that the comprehensive treatment measures adopted are effective methods for tunnel collapse Safe disposal of arch has a successful practical experience.