石人山隧道全长355m,设计单洞建筑限界净宽10.25m,净高5.0m,为连拱隧道,是宜叙高速“创精品、树形象、重质量、抢进度”重点目标之一,而石人山隧道中导洞是该隧道的核心组成部分,也是最难点,它在连拱隧道的结构中起到支撑和连接作用,决定着洞身开挖的方向,同时对洞身的围岩情况做了先行探察,为主洞开挖积累资料。 The Shirengshan tunnel is 355m in total length. The designed single-hole building has a clear net width of 10.25m and a net height of 5.0m. It is a multi-arch tunnel and should be the key target of high speed, “creating quality, tree image, quality and grab progress” One, while the Shizishan tunnel in the pilot tunnel is the core component of the tunnel, but also the most difficult point, which in the double-arch tunnel structure to play the role of support and connectivity, determining the direction of the tunnel excavation, while the hole body Of the surrounding rock made a first exploration, accumulation of data for the main tunnel excavation.