摘要
跨河道传播爆破地震波的问题在水电工程建设中较常见,通过理论分析,计算了爆破地震波通过河道水体时的透反射情况,通过动力有限元数值模拟,讨论了河道内有水和无水两种情况下,地震波通过基岩传播引起的两岸地面质点及河道表面质点的峰值震速分布情况。通过数值模拟结果可知,在爆破地震波跨河道传播中,不考虑水体影响时岩体内各点的峰值震速较考虑水体影响情况下的峰值要大。理论计算结果和不考虑水体影响时的数值计算结果是偏于安全的。
The influence of riverway on the transmission of blasting seismic wave is a familiar problem during engineering construction. Based on theoretical analysis, the coefficient of transmission and reflection of blasting seismic wave when it passes the water in riverway is calculated in this paper. Through numerical simulation, the peak particle velocity distribution of the bank and the riverway is gained when blasting seismic wave passes the riverway under the cases that there is water and no water in the riverway. respectively. Comparing the dynamical response of the bank and the riverway under three calculation conditions, it is found that the results of theoretical analysis and the numerical simulation when water is not accounted are safe.
出处
《长江科学院院报》
CSCD
北大核心
2003年第B12期5-7,共3页
Journal of Changjiang River Scientific Research Institute
关键词
爆破地震波
河道
透反射系数
峰值震速
水电工程
有限元
数值模拟
blasting seismic wave
riverway
coefficient of transmission and reflection
the peak particle velocity
