Abstract: At present, the drill-blasting method is often used in the construction of mountain highway tunnels in China. Most of the tunnel linings are traditional on-site pouring, which adversely affects personnel health, safety, construction efficiency and engineering quality. With the improvement of economic and transportation construction level, the tunnel construction tends to be standardized, mechanized and prefabricated. According to domestic and international engineering construction experience, the development of prefabrication and assembly technology can solve the above problems. Under the premise of the lack of relevant research and construction experience at home and abroad, the key technologies such as lining structure, type selection, block design, thickness, and joint bending stiffness were studied for the prefabricated lining structure in drill-blasting method of highway tunnel. A new type of fabricated lining structure was proposed. The beam-spring model was used to simulate the thickness and joint stiffness of the structure. The deformation and internal force distribution characteristics were analyzed to ensure the safety and reliability of the structure and to provide experience for similar projects.

Key words: tunnel engineering, mountain highway tunnel, drill-blasting method, pre-fabricated structure, structural analysis, beam-spring model

摘要： 目前我国山岭公路隧道常采用钻爆法施工，隧道衬砌大多为传统的现场浇筑施工，这对人员健康、安全保障、施工效率和工程质量等都产生不利影响。随着经济和交通建设水平的提高，隧道建设趋向于标准化、机械化和预制化发展，根据国内外工程建设经验，预制装配技术的发展可以解决上述问题。在国内外缺乏相关研究和建设经验的前提下，针对钻爆法公路隧道的装配式衬砌结构进行了关键技术研究，如结构构造设计、衬砌类型选择、分块设计以及接头转动刚度等，提出装配式衬砌结构新型式，采用梁-弹簧模型对该结构的厚度、接头刚度进行模拟，分析其变形和内力分布特征，保证结构的安全可靠，为类似工程提供经验。

关键词: 隧道工程 , 山岭公路隧道, 钻爆法, 预制装配式结构, 结构分析, 梁-弹簧模型