碾压混凝土围堰爆破拆除震动安全分析

在高坝洲水电站下游纵向碾压混凝土围堰爆破拆除中进行了爆破测震试验。对现场实测爆破震动波形的研究表明 ,采用使堰体翻转的爆破拆除方案时 ,选用条形间断装药、雷管分段延时起爆、隔震孔、预裂缝等技术措施 ,完全能够降低大爆破带来的结构振动 ,确保相邻堰体的安全

RESEARCH ON SAFETY PROTECTION PROBLEMS IN BLASTING DEMOLITION OF COFFERDAM AND ROCK RIDGE OF LARGE HYDROPOWER STATION

In blasting demolition of cofferdam and rock ridge of large hydropower station,the effects of blasting vibration,water blast wave,surging wave and unexpected slungshot etc to surrounding construction must be considered.And it is also necessary to establish appropriate blast safety control criterion for the physical characteristic of different style building and to adopt corresponding measures for making the blasting destructive impact controlled under safety scope.The present paper summarizes and analyzes the key problems and their solving solutions in blasting demolition of cofferdam by taking the blasting operation conducted in the Xiaowan Hydropower Station as an instance.