岩溶地区双连拱隧道安全快速施工技术

Safe and Quick Construction Technology for Double Arch Tunnel in Karst Areas

针对岩溶地区大跨径、双连拱隧道安全效益和经济效益平衡问题,通过转角塘隧道施工实例,分析了三导洞法和中导洞法的适用条件,介绍了支护方案的设计与选择、进洞施工技术、主洞开挖钻爆设计、掘进方案、超前地质预报、监控量测和二次衬砌施工组织等。

In view of the security and economic benefits issue of the large span and double arch tunnel in karst areas, through the construction example of Zhuanjiaotang tunnel, the paper analyzes the applying condition of the three-pilot drift method and middle-pilot drift method, and introduces the design and selection of the supporting scheme, tunnel-entering construction technology, design and scheme of excavation and drilling and blasting for the main tunnel, advanced geological forecast, monitoring measurement and the secondary lining construction organization etc.