论文部分内容阅读
将爆破地震波进行合理近似简化,采用波函数展开法,推导了无限岩石介质中爆破地震波作用下隧道围岩动应力集中系数的表达式,结合具体算例,从理论上定量分析了围岩不同位置上爆破地震波主频和围岩物理力学指标对动应力集中系数的影响。分析结果表明:隧道围岩迎爆侧的动应力集中系数整体上大于背爆侧,动应力集中系数峰值偏向于迎爆侧;在不同主频爆破地震波作用下,动应力集中系数的影响存在最大值;隧道围岩的弹性模量对动应力集中系数的影响较大,而泊松比对动应力集中系数的影响较小。
The blasting seismic wave is reasonably approximated and simplified. By using the wave function expansion method, the expression of dynamic stress concentration factor of tunnel surrounding rock under blasting seismic wave in infinite rock medium is deduced. Combined with concrete examples, Influence of Blasting Frequency of Seismic Wave and Physical and Mechanical Index of Surrounding Rock on Dynamic Stress Concentration Coefficient. The analysis results show that the dynamic stress concentration coefficient on the blast side of the surrounding rock mass is larger than that on the backburst side and the peak value of the dynamic stress concentration coefficient is on the blast side. Under the influence of different frequency blasting seismic waves, the influence of dynamic stress concentration factor The elastic modulus of the tunnel surrounding rock has a greater impact on the dynamic stress concentration factor, while the Poisson’s ratio has less effect on the dynamic stress concentration factor.