滇中引水隧洞破碎围岩超欠挖控制技术及管理方法  

Control Technology and Management Method of Over and Under Excavation of Broken Surrounding Rocks in tunnel of Yunnan Water Diversion Project

作　　者：聂启强 张家志 全明威 傅洪贤[2] 薛伟伟 邓利群 王硕 NIE Qi-qiang;ZHANG Jia-zhi;QUAN Ming-wei;FU Hong-xian;XUE Wei-wei;DENG Li-qun;WANG Shuo(No.3 Construction Company of China Railway No.10 Engineering Group,Hefei 230031,China;School of Civil Engineering of Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]中铁十局集团第三建设有限公司,安徽合肥230031 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《云南水力发电》2022年第6期203-207,共5页Yunnan Water Power

摘　　要：为了解决滇中引水工程的凤凰山隧洞Ⅳ类破碎围岩超欠挖比较严重的问题,通过理论研究和现场试验,发现周边眼和内圈眼的爆破参数不合理是造成超欠挖的主要因素。对周边眼和内圈眼爆破参数进行优化试验,给出了周边眼开孔位置与隧道轮廓线的关系,周边眼长短组合方法,同时给出周边眼和内圈眼爆破参数,把Ⅳ类围岩的超欠挖控制在合理的5~10cm范围内,为了把爆破方案落实到位,制定了合理的光爆管理方法。The purpose of this paper is to solve the serious problem of over-and under-excavation of Class Ⅳ fractured surrounding rocks in Fenghuangshan Tunnel of water diversion project in Yunnan Province.Through theoretical research and field test, it is proved that the unreasonable blasting parameters of surrounding eye and inner ring eye are the main factors causing over and under excavation. In this paper,the blasting parameters of the surrounding eye and inner eye are optimized, and the relationship between the position of the surrounding eye opening and the tunnel contour as well as the combination method of the length and length of the surrounding eye are given. At the same time, the blasting parameters of surrounding eye and inner ring eye are given, and the over-under-excavation of Class Ⅳ surrounding rock is controlled within a reasonable range of 5-10 cm. In order to put the blasting scheme into place, a reasonable management method of detonation is formulated.

关 键 词：引水隧洞 光面爆破 控制超欠挖 爆破管理 

分 类 号：TV554.1[水利工程—水利水电工程]