连拱隧道软岩大变形特征分析及施工方法研究

On analysis of features of large-deformation of multiple-arch tunnel in soft rock and its construction method

通过邵家台连拱隧道施工中开展的软岩大变形研究及现场施工实践,分析和总结了软弱围岩在施工过程中出现的地质、地应力及围岩变形特征等,针对其特点探讨了控制变形支护参数及有效的施工方法,解决了现场施工难以正常掘进问题,同时也保证了隧道的施工安全和质量。

According to the research on the large-deformation of Shaojiatai multiple-arch tunnel in soft rock construction and its site practice,the paper analyzes and sums up the geological features,crustal stress and surrounding rock deformation in the construction process of the weak surrounding rock,and explores the controlling and deformation support parameter and effective construction methods,so as to solve some problems in the jacking of the site construction and ensure the tunnel construction safety and quality.