隧道穿过特大特长地质断层施工工艺探索  

Exploration on Construction Technology for Tunnel Passing Through Extra-large and Super-long Geological Fault

作　　者：徐茂华[1] 郑元凯[1] 何林智 XU Maohua;ZHENG Yuankai;HE Linzhi(Sichuan Ertan International Engineering Consulting Co.,LTD,Chengdu,Sichuan,611130)

机构地区：[1]四川二滩国际工程咨询有限责任公司,四川成都611130

出　　处：《四川水力发电》2022年第3期60-62,共3页Sichuan Hydropower

摘　　要：随着科学技术的不岩断发展,地下洞室在我国现代水电建筑物施工中取得了很大的进步。但对于一些不良地质洞段,由于围稳定性差,在开挖贯通过程中,若施工方法不当,极易发生塌方、冒顶等情况,这对工程进度、安全生产都会造成极为严重的影响,甚至危及人生安全。本文通过拉哇水电站⑧道路交通隧道遇特大断层破碎带对比分析,采取大管棚、超前小导管+超前锚杆等合理的加强支护措施,并通过施工期临时监测,使洞室不良地质段施工安全得到保障。With the continuous development of science and technology,great progress has been made in construction of underground caverns of modern hydropower structures in China.However,if proper construction method is not applied,collapse and roof fall can easily occur during excavation of tunnel sections with unfavorable geological conditions due to poor stability of surrounding rock,which seriously affects construction progress and safety,and even endangers life.On the base of comparative analysis,this paper expounds the utilization of such support measures as big pipe shed,advance ductile plus advance anchor bolt,etc.,for reinforcing support of tunnel sections in traffic tunnel No.8 of Lawa Hydropower Station,where a large fault fracture zone is encountered.Temporary monitoring during construction period proves that the construction safety of tunnel sections with unfavorable geological condition is ensured.

关 键 词：特大断层 围岩开挖 塌腔回填 辅助措施 

分 类 号：U459[建筑科学—桥梁与隧道工程] F407.1[交通运输工程—道路与铁道工程] TV52[经济管理—产业经济]