银英公路大庙峡隧道塌方冒顶处理施工技术

Construction Technology of Landslide and Roof Fall in Damiao Gorge Tunnel of Yinying Highway

银英公路大庙峡隧道地处侵蚀溶蚀山岭重丘地貌,区内地层主要为泥盆系中统棋子桥组(D2q)灰白色厚层状灰岩,发育岩溶、土洞,溶蚀现象较明显,进出口浅埋段溶蚀极度发育,施工中极易发生塌方冒顶,处理施工难度大。文中结合大庙峡隧道出口浅埋段塌方冒顶施工特点,介绍了塌方冒顶施工处理、监控量测等施工方法,对以后类似工程处理能提供较好的参考经验。

The Damiao Gorge Tunnel is located in the eruption of the ridge and the ridge of the heavy hill,where the main strata are the thick and gray limestone strata of the D2q in the Devonian,and the karst,soil cave and dissolution is obvious.The deep cutting of the exit is of extreme development,making the construction of landslides prone to fall and the construction of difficult.Based on the construction characteristics of the landslide in the shallow cutting section of the Damiao Gorge tunnel,this paper introduces the construction method for the construction of the landslide and the monitoring and measuring,which provides a better reference experience for similar engineering treatment.