论文部分内容阅读
高黎贡山隧道全长34.538km,具有“三高四活跃”的地质特点。采用钻爆法结合正洞9.03 m TBM与平导6.36 m TBM的方法进行施工,其中TBM通过岩溶及软岩大变形洞段是本工程控制的重点,也是难点。为解决TBM在该类地层中掘进时偏机、栽头、刀盘被卡、收敛变形引起整机被卡等施工风险,通过查阅资料、调研国内外现有敞开式TBM施工案例、专家咨询研讨、高适应性的TBM设计以及结合工程目前施工状况等多种方案,提出TBM超前地质预报、钢筋排、钢拱架和喷射混凝土联合及时支护等一系列确保TBM连续施工的方案与措施。该方案与措施的顺利实施能够很好的保证TBM在岩溶及软岩大变形洞段的连续掘进,为工程顺利实施奠定坚实的基础,且能为今后类似的工程提供参考。
The Gaoligongshan tunnel has a total length of 34.538km and has the geological features of “three highs and four actives”. The drilling and blasting method is combined with the construction of 9.03 m TBM plus 6.36 m TBM of the normal tunnel. The TBM passing the karst and the large deformation section of soft rock is the key and difficult point of the project control. To solve the TBM excavation in such stratum partial machine, planting head, the cutter card is stuck, the convergence deformation caused by the whole card is stuck and other construction risk, through access to information, research at home and abroad existing open TBM construction cases, expert advice and discussion , Highly adaptable TBM design and combined with the current construction status of the project, a series of schemes and measures to ensure continuous construction of TBM are put forward such as advanced geological prediction by TBM, combined reinforcement of steel bars, steel arch and shotcrete. The successful implementation of this program and measures can well guarantee the continuous tunneling of TBM in karst and soft rock large deformation sections, laying a solid foundation for the successful implementation of the project and providing reference for similar projects in the future.