复杂地形条件下浅埋小净距公路隧道出洞技术研究

Study on Shallow Buried Small Clear Distance Highway Tunnels Unkennel Technology under Complex Topographic Condition

受出洞地形条件限制,公路隧道采用传统的超前小导洞出洞施工时,往往会出现施工空间不足、交通不便等问题。以青海省张掖至河南公路牙什尕至同仁段隆务峡5号隧道为实例,通过三台阶七步开挖法结合双层超前小导管法,分析研究复杂地形条件下浅埋小净距山岭隧道出洞技术,为类似工程施工提供参考。

Restricted by unkennel topographic condition, when adopting traditional advanced snail pilot tunnel unkennel construction in highway tunnels construction, problems of insufficient construction space, traffic inconvenience, etc may occur. Taking Qinghai Province Zhangye -Henan highway Yashiga -Tongren section Longwuxia No. 5 tunnel as practical example, through combining three - bench seven - step excavation method and double- deck advanced small pipe method, this paper analyzed and studied shallow buried small clear distance highway tunnels unkennel technology under complex topographic condition and provided reference for similar engineering constructions.