梅州抽水蓄能电站地下厂房基坑开挖体形控制施工技术  

Construction Technology of Foundation Pit Excavation Control for Underground Powerhouse of Meizhou Pumped Storage Power Station

作　　者：杨耀 张朝泽 YANG Yao;ZHANG Chaoze(SINOHYDRO 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：《广东水利水电》2020年第10期1-5,共5页Guangdong Water Resources and Hydropower

摘　　要：梅州抽水蓄能电站地下厂房机组基坑体形复杂,爆破开挖体形控制难度大,施工中采用预留保护层及一次性深孔预裂爆破技术控制开挖体形,预裂爆破后基坑分层开挖,保护层一次性开挖,优化了施工流程,基坑开挖成型效果优良,减小了设计轮廓线以外超挖及后期回填混凝土工程量,在降低投入成本和全面推进施工进度的基础上,保证了基坑开挖质量。In the underground powerhouse of Meizhou pumped storage power station,it is difficult to control the shape of foundation pit in blasting excavationbecause of its complex type.The blasting technology ofreserve protection layer and one-off excavation of the deep hole pre-splitting is applied to control the shape.After the presplit blasting,stage excavation is taken and one-off excavation is applied to excavate protection layer,which optimizes the construction process.Excavation molding effect is well,andthe backfill concrete volume outside thecontour lines isreduced.And the excavation of foundation pit is guaranteed with lower cost and construction schedule.

关 键 词：地下厂房 基坑 保护层开挖 预裂爆破 抽水蓄能电站 

分 类 号：TV731.6[水利工程—水利水电工程]