大峡导流明渠进口处挡水岩坎爆破拆除设计与施工DEMOLITION DESIGN AND CONSTRUCTION OF RETAINING ROCK BAR AT ENTRANCE OF DIVERSION CHANNEL IN DAXIA HYDROPOWER STATION
刘万忠
Liu Wanzhong(The Third Hydroelectric Construction Bureau of China;
摘要(Abstract)：
黄河大峡水电站导流明渠施工期间，在进口处采用预留岩坎挡水。主河床截流前采用硐室双向抛掷爆破顺利完成了岩坎的拆除任务。本文介绍了预留岩坎爆破拆除的设计与施工。
During the construction of diversion channel in Daxia Hydropower Station in Yellow River, a retaining rock bar was reserved at entrance of diversion channel.Before the main river would be cut off, the rock bar was demoleted by coyote blasting with a way of throwing the broken rock in two directions.The main points of design in demolition of water retaining rock bar were presented in this paper.
关键词(KeyWords)：
挡水岩坎，爆破拆除
Retaining rock bar Blasting demolition
基金项目(Foundation):
作者(Authors):
刘万忠
Liu Wanzhong(The Third Hydroelectric Construction Bureau of China;