摘要
向家坝右岸坝后电站下游碾压混凝土围堰分5个区域进行爆破拆除,拆除期间围堰继续挡水。由于拆除工期紧张、环境复杂、交叉干扰大,通过采用高精度雷管进行孔间微差爆破网路设计,同时铺设减震垫层和开挖减震沟,显著降低了爆破震动,达到了预期目标。
The downstream RCC cofferdam behind dam on right bank, Xiangjiaba Hydropower Station is removed by blasting in five sections. During the removal, the cofferdam retains water as well. As the removal period is short, environment is complicated and interference is serious. Millisecond blasting network with high-precision detonators is designed. Meanwhile, cushion bedding for vibration reduction is provided and vibration-reducing ditches are excavated. These measures largely mitigate vibration by blasting and the expected objective is achieved.
作者
陈靖敏
CHEN Jingmin(Three Gorges Construction Engineering Co.,Ltd.,China Gezhouba Group,Yichang,Hubei 443002,China)
出处
《西北水电》
2018年第5期56-59,共4页
Northwest Hydropower
关键词
向家坝水电站
围堰
爆破拆除
Xiangjiaba Hydropower Station
cofferdam
removal by blasting
