摘要
文章结合梧州至柳州高速公路土建工程№A01-7标段枫木界隧道Ⅳ级围岩开挖工程实例,从开挖方法、钻爆设计、超欠挖情况、超前地质预报、监控量测及施工控制要点等方面详细介绍了在水平砂岩层隧道Ⅳ级围岩中采用二台阶法开挖的技术经验,为类似隧道钻爆法开挖施工提供一定的参考借鉴。
Combined with the IV-grade surrounding rock excavation engineering practices of Fengmujie Tunnel in civil engineering NQA01-7 tender segment of Wuzhou-Liuzhou Expressway,this article intro- duced the technical experience of using the two-step method for the excavation of Ⅳ-grade surround- ing rock of tunnel in horizontal sandstone layer from the aspects of excavation method, drilling and blasting design, over/under excavation situation, advanced geological prediction, monitoring and measurement, and construction control points, thereby providing some reference for the drilling and blasting excavation construction of similar tunnel.
出处
《西部交通科技》
2017年第9期68-71,共4页
Western China Communications Science & Technology
关键词
水平层状
砂岩体
Ⅳ级围岩
开挖
二台阶法
Horizontal stratum
Sandstone body
Ⅳ-grade surrounding rock
Excavation
Two- step method
