沙沱水电站纵向混凝土围堰爆破拆除方案探讨

乌江沙沱水电站纵向围堰建于表孔溢流面、消力池底板和消力池尾坎等永久建筑物上，由于距离过近，必须采取预裂爆破技术。从炮孔布置、预裂爆破参数、装药结构、起爆网络等方面介绍了爆破方案，并通过爆破振速公式确定了最佳段装药量。施工实践表明，沙沱水电站纵向混凝土围堰预裂爆破达到了预期效果，确保了爆区周边永久建筑物的安全稳定。

Blasting demolition scheme of longitudinal concrete cofferdam of Shatuo Hydropower Station

The longitudinal concrete cofferdam of Shatuo Hydropower Station was built on a series of permanent structures, the distance between the cofferdam and these structures was too small so that the pre-splitting blasting technology must be adopted. The blasting solution was introduced in terms of blasting hole layout, parameters of pre-splitting, charging structure, initiating network and the best sectional charge was determined through blasting vibration formula. The engineering practice showed that the blasting demolition of longitudinal cofferdam of Shatuo Hydropower Station reached expected effects, and the safety of surrounding structures was guaranteed.