永泰抽水蓄能电站主副厂房洞爆破开挖技术  

Blasting Excavation Technology of Main and Auxiliary Power House Tunnel of Yongtai Pumped Storage Power Station

作　　者：马军峰 李博 MA Jun-feng;LI 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10期165-169,共5页Yunnan Water Power

摘　　要：福建永泰抽水蓄能电站主副厂房洞在晶屑凝灰熔岩和花岗斑岩地质条件下断面形式多样、开挖断面大,建筑高度高;岩壁吊车梁的开挖,周边辅助洞室较多,涉及相邻洞室交叉开挖,局部存在不良地质段。与普通爆破相比较,大断面地下洞室中层爆破与预裂爆破相结合,效果更好,在提高工程进度、缩短工期的同时,还能提高施工质量。在开挖过程中,要根据实际情况,合理制定开挖爆破参数,把握好钻孔孔向、装药量等,并严格按照制定的参数实施,光爆孔残留炮孔痕迹应在开挖轮廓面上均匀分布,相邻两孔间岩面平整,孔壁无明显爆震裂隙。The main and auxiliary powerhouse tunnels of Fujian Yongtai Pumped Storage Power Station have various section forms,large excavation section and high building height under the geological conditions of crystal debris tuff lava and granite porphyry.There are many auxiliary tunnels around the excavation of rock wall crane beam,involving the cross excavation of adjacent tunnels,and some unfavorable geological sections exist locally.Compared with common blasting,the combination of medium blasting and pre-splitting blasting in large section underground chamber has better effect.It can also improve the construction quality while improving the project progress and shortening the construction period.During excavation,blasting parameters for excavation shall be reasonably formulated according to actual conditions,hole orientation,charge quantity,etc.,and strictly implemented according to the parameters.Traces of residual blasting holes of smooth blasting holes shall be evenly distributed on the excavation contour surface,with smooth rock surface between adjacent two holes and no obvious knock cracks in the hole wall.

关 键 词：永泰抽水蓄能电站 主副厂房洞 爆破开挖 施工技术 光爆孔 

分 类 号：TV554.1[水利工程—水利水电工程]