溶岩地区双连拱隧道施工技术研究

摘要

Main tunnel of Guangdong Luoyang Expressway is a twin-arch tunnel and located in karst development area with complicated geological conditions and large construction difficulty. Based on Shizhu Tunnel, this paper introduces construction technology for twin-arch tunnels in geological sections of karst development, and concludes key techniques of comprehensive leading geological forecast, treatment of bursting mud and water and treatment of medium heading and main cave, etc. in construction of twin-arch tunnels in karst area, providing a reference for design and construction of twin-arch tunnels in karst area.%广东省罗阳高速公路石主隧道为双连拱隧道，其位于溶岩发育区，地质情况复杂，施工难度大。以石主隧道为工程依托，介绍双连拱隧道在溶岩发育地质段的施工技术，总结溶岩地区双连拱隧道在施工过程中的综合超前地质预报、突泥涌水处理、中导坑及主洞溶洞处理等关键技术，为溶岩地区双连拱隧道设计和施工提供参考。