高地震区域挤压破碎围岩条件下地下厂房施工技术  

Construction Technology of Underground Powerhouse under the Condition of Crushed Surrounding Rock in High Seismic Area

作　　者：杨泽恒 李晓军 撒雪艳 段艳飞 YANG Ze-heng;LI Xiao-jun;SA Xue-yan;DUAN Yan-fei(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》2022年第5期165-168,共4页Yunnan Water Power

摘　　要：根据现场实际地质情况,以礼河四级电站复建工程地下厂房断层发育,结构面分级多为Ⅲ~Ⅳ级,与厂房轴线夹角较大,多大于60°,其中断层F15和断层f57对厂房边端墙影响较大。项目部遵循“中部超前左右两侧跟进、薄层开挖、随层支护”的原则组织现场的施工,过程中采取顶拱预固结处理、边墙采用光面控制爆破等措施,通过对地下厂房开挖爆破参数控制,合理进行分层分序,保证厂房开挖成型质量、岩锚梁部位在Ⅳ类围岩条件下的施工成型。According to actual geological conditions on site, faults in underground powerhouse of Yilihe IV Hydropower Station Reconstruction Project are well developed. Its structural plane classification is mostly Grade Ⅲ-Ⅳ, which has a large angle with the axis of power house and is more than 60 degrees. Fault F15 and fault f57have a greater impact on the side wall of power house. The project department organizes the construction on site according to the principle of "leading in the middle, following up on the left and right sides, excavating thin layers and supporting with layers". During the process, the crown arch is pre-consolidated and smooth blasting measures are adopted for side walls. Through controlling blasting parameters for excavation of underground power house,layered and sequenced reasonably, the excavation quality of power house and the construction shaping of rock anchor beam under the condition of IV surrounding rock are guaranteed.

关 键 词：地下厂房 断层 固结灌浆 光面爆破 

分 类 号：TV542[水利工程—水利水电工程] TV543.5