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西安南京铁路东秦岭特长隧道全长 12 2 6 8m ,设计为双线加平行导坑方案 ,钻爆法施工。隧道进出口各 35m采用模筑混凝土衬砌 ,洞身其余地段采用复合式衬砌 ,支护均以喷、锚、网为主 ,并辅以钢架。隧道设计总工期为 5 8.32个月 ,是全线的控制性工程。从地质特征、方案比选、结构设计等方面阐述隧道的设计方案
The total length of the East Qinling Super-long Tunnel of Xi’an Nanjing Railway is 12 2 6 8 m. It is designed as a two-lane plus parallel guided pit scheme and a drill-and-blast method. Tunnel import and export of 35m with concrete construction of concrete lining, the remaining sections of the cave using composite lining, support are spray, anchor, network-based, supplemented by steel frame. The total duration of the tunnel design is 5 8.32 months, which is a control project across the board. From the geological features, program comparison and selection, structural design and other aspects of the tunnel design