Dynamic response analysis of multi-step bedding rock slope caused by blasting during anti-slip pile excavation
To analyze the characteristics of blasting load during the construction of anti-slip piles and the vibration velocity law of multi-step bedding slopes,a dynamic analysis model for anti-slip pile blasting and multi-step bedding rock slope was established using the LS-DYNA and FLAC3D software based on the slope engineering of Wuzhen Expressway in this article.The results show that the maximum load of anti-slip pile construction blasting has the characteristics of small horizontal and large vertical,and the dynamic characteristics of the multi-step bedding rock slope surface are shown as follows:① The horizontal vibration velocity of the lower part of the slope is greater than the vertical vibration velocity,while the vertical vibration velocity of the upper part of the slope is greater than the horizontal vibration velocity;② There is an elevation amplification effect on the surface of the multi-step bedding rock slope,and the amplification rate of vertical vibration velocity is greater than that of horizontal vibration velocity;③ There is a"surface amplification effect"inside the multi-step bedding rock slope and it varies with the slope position;④ The horizontal attenuation rate is larger on the lower slope,while the vertical attenuation rate(amplification rate)is larger on the upper slope and the attenuation rate at the foot is greater than that at the top of the slope.
multi-step bedding rock slopenumerical simulationblastingelevation amplification effectsurface amplification effect
万方数据
维普
