穿越断裂带地质的隧道洞门挖掘施工技术

Construction Technology of Tunnel Gate Excavation through Geological Fracture Zone

位于四川省绵阳市高川乡二郎村境内的新建成都至兰州铁路CLZQ-5标跃龙门隧道1#斜井,其穿越地质情形特别复杂的龙门山断裂带,该地区的地质情况极为复杂,呈现出典型的“四极三高”特征,即地形切割极为强烈、构造条件极为复杂活跃、岩性条件极为软弱破碎、汶川地震效应极为显著;属于地质条件十分复杂的艰险山区。跃龙门隧道1#斜井的洞门施工,克服种种不利条件,为铁路工程单位恶劣地质条件下的隧道洞门施工提供了宝贵的经验。

Located in Erlang Village,Gao Chuan Township,Mianyang City,Sichuan Province,the 1#inclined shaft of yue longmen Tunnel of CLZQ-5 Contract of Chengdu-Lanzhou Railway,which is a newly-built railway,passes through Longmenshan Fault Zone with extremely complex geological conditions.The geological conditions in this area are extremely complex,showing typical characteristics of"four poles and three highs",namely,"the terrain cutting is extremely strong,the structural conditions are extremely complex and active,the lithologic conditions are extremely weak and broken,and the Wenchuan earthquake effect is extremely significant;It is a dangerous mountainous area with complicated geological conditions.The tunnel portal construction of No.1 inclined shaft of yue longmen Tunnel overcomes various unfavorable conditions and provides valuable experience for tunnel portal construction of railway engineering units under severe geological conditions.