TB水电站主变洞高边墙深孔预裂施工技术  

Construction Technology of Deep Hole Presplitting for High Side Wall of Main Transformer Tunnel in TB Hydropower Station

作　　者：张利生 刘金山 ZHANG Lisheng;LIU Jinshan(POWERCHINA SINOHYDRO ENGINEERING BUREAU 14 CO.,LTD.,Kunming 650041,China)

机构地区：[1]中国水利水电第十四工程局有限公司,云南昆明650041

出　　处：《云南水力发电》2024年第S02期75-79,共5页Yunnan Water Power

摘　　要：水电站主变洞开挖、支护质量对其结构安全起到决定性作用,主变洞高边墙开挖受常规施工设备、施工工艺等限制,质量控制难度大。TB水电站主变洞高边墙开挖施工,通过对常规施工设备及施工艺进行优化改进,采用深孔预裂施工技术,达到开挖轮廓线大面平整、无错台接茬、整体成型质量优良、减少技术性超挖等的效果,同时洞周围岩整体稳定。The excavation and support quality of the main transformer tunnel in hydropower stations play a decisive role in its structural safety.The excavation of the high side wall of the main transformer tunnel is limited by conventional construction equipment and techniques,making quality control difficult.By optimizing and improving conventional construction equipment and techniques,deep hole presplitting construction technology is adopted for the excavation of high side walls in the main transformer tunnel of TB hydropower station.It can achieve the effects of smooth excavation contour lines,no staggered joints,excellent overall forming quality,reduced technical overexcavation,and overall stability of the surrounding rock of the tunnel.

关 键 词：水电站 主变洞 高边墙 深孔预裂 

分 类 号：TV554[水利工程—水利水电工程]