山西中部引黄水源工程地下厂房开挖施工技术  

Construction Technology for Excavation of Underground Powerhouse of Yellow River Diversion Water Source Project in Central Shanxi

作　　者：李庆国 徐建华 侯帅 蔡威博 LI Qing-guo;XU Jian-hua;HOU Shuai;CAI Wei-bo(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》2021年第8期89-101,共13页Yunnan Water Power

摘　　要：顶层开挖与混凝土衬砌交叉进行,直边墙预裂爆破施工技术加快施工速度,较常规预留保护层,再进行光面爆破开挖对岩锚梁的保护更加有效。岩锚梁岩台双面光爆平整度达到预期效果,保证了岩台开挖质量。各层支护随层跟进,底部富水区域采取超前固结灌浆,再进行开挖,保证了基础质量和预防出现较大涌水,确保了施工安全。安全监测表明,厂房开挖控制变形无异常变化,边顶趋于稳定。The top excavation is carried out crosswise with concrete lining,and the construction technology of Pre-splitting Blasting of straight side wall is adopted to speed up the construction.The protection of rock anchor beam is more effective by reserving protective layer and then smooth blasting excavation.The flatness of double-sided smooth blasting of rock anchor beam rock platform achieves the expected effect and ensures the excavation quality of rock platform.With the follow-up of each support layer,advanced consolidation grouting is adopted in the bottom water-rich area and excavation is carried out,which ensures the foundation quality and prevents large water inrush and ensures construction safety.Safety monitoring shows that there is no abnormal change of controlled deformation during excavation of power house and the side roof tends to be stable.

关 键 词：地下厂房 预裂爆破 岩台开挖 基础处理 

分 类 号：TV554[水利工程—水利水电工程]