摘要
本文以拉西瓦水电站工程为背景,以爆破监测速度为激励信号输入进行了相对位移反应谱的计算,并应用相对位移反应谱理论对岩体爆破震动损伤进行了相关分析。得到结论:相对位移反应谱积分值、以及该积分值与震动持续时间的乘积值均与岩石损伤深度的相关性较好;而且岩体阻尼比对相关系数影响不明显。因此,运用岩体损伤深度线性拟合方程对岩体爆破震动损伤效应进行综合评估是可行的。文章成果对工程实践有一定的参考价值。
The spectrum of relative velocity response of Laxiwa hydropower station to the excitation of monitored and measured blasting velocity is computed in this paper,and the damage fracture of rock blasting is analyzed by the theory of relative displacement response spectrum.The results show that the depth of rock blasting has a high correlation with the integral value of relative displacement response spectrum and the product of this integral value and the duration of blast vibrations,and that rock damping has insignificant influence on correlation coefficient.Thus it is feasible and practical to use fitting equation of rock damage depth as a comprehensive measure of blast effect for engineering design.
出处
《水力发电学报》
EI
CSCD
北大核心
2011年第6期127-132,共6页
Journal of Hydroelectric Engineering
关键词
水利水电工程
岩石损伤
反应谱
爆破震动
速度输入
相对位移反应谱
conservancy and hydropower engineering
rock damage
response spectrum
blast vibration
velocity input
relative displacement response spectrum
