小湾水电站导流洞围堰爆破时临近建筑物的安全评价

Safety Evaluation of the Cofferdam Demolition by Blasting for the Diversion Tunnel Inlet Tower in Xiaowan Power Station

利用小湾水电站导流洞进水口围堰堰前爆破实测质点振速波形所建立的反应谱曲线,采用AN-SYS程序对导流洞进水塔进行了动力计算分析(反应谱法)。计算结果表明,在设计单响药量条件下,围堰拆除爆破不会对进水口整体建筑物产生破坏影响。

This paper establishes the response spectra by using the particle vibration velocity wave of monitoring in the diversion tunnel inlet cofferdam per-demolition of Xiaowan, and by applying the ANSYS FEA software to calculate the dynamical response of the inlet tower of diversion tunnel. The result indicates that, under the design condition of charge amount per delay interval, the cofferdam demolition blasting has no destruction influence on the water inlet overall building.