双连拱隧道施工技术

Construction technology of double-arch tunnel

针对连拱隧道埋深浅、长度短、偏压及跨度大的特点,进行了双连拱隧道施工方案比选,论述了三导洞施工技术在连拱隧道中的应用,并指出三导洞施工法的应用既保证了隧道顺利安全地完成,又确保了工程进度,赢得了社会效益。

Considering multi-arch tunnel＇s characteristics,such as shallow buried depth,short length,unsymmetrical pressure and large span,this paper compares and selects different double-arch tunnel construction schemes,elaborates the application of 3-heading excavation method in the multi-arch tunnels and points out that the application of 3-heading excavation method not only guarantees the completion of the tunnel in a smooth and safe way,but also guarantees the construction speed,which brings social benefit.