Shaking Table Model Test Of Bedding Rock Slopes With Different Rock Inclination Angles

Earthquake is a kind of regular geological disasters caused by the unbalanced movement of the earth's interior that endangered the survival of human beings.However,a series of secondary geological disasters induced by earthquakes,such as landslides,collapses,and mudslides,often cause serious casualties and economic losses that severely damage the ecological balance and regional sustainable development.Under infrastructure construction,the engineering has always been involving stratified rock structure slopes,which inevitably face the problem of seismic stability of such slopes.Therefore,the research on the deformation failure mechanism and dynamic response law of bedding rock slopes under earthquake action has important engineering practical significance.This research mainly focuses on bedding rock slopes with different rock inclination angles,so to reproduce the deformation and destruction process of dangerous geological formations by the method of vibration table model test and numerical simulation,and compares and analyzes the influence of rock formation inclination on the deformation and destruction mode and dynamic response law of the rock slopes.The main research contents and results are as follows:(1)According to the typical structural characteristics of the bedding rock slope,the main research attaches great importance to the influence of the rock inclination angle.A total of 4sets of bedding rock slope physical models with different rock inclination angles have been designed and produced to perform a shaking table model test.These include the determination of similar relationships,the selection of similar materials and model boxes,the design and production of slope models,the formulation of sensor layout schemes,the selection of seismic waves and the formulation of loading schemes.The entire process of deformation and instability of the 4 groups of model slopes in the shaking table model test have been observed and recorded.The results show that the deformation and instability modes of bedding rock slopes with different rock inclination angles are different under seismic excitation,and the rock inclination angles are different.The larger the value,the earlier and more serious the deformation and failure of the bedding rock slope will occur.(2)The dynamic response laws of 4 groups of bedding rock slopes with different rock inclination angles have been analyzed from the angle of acceleration amplification factor.The acceleration dynamic response data of each part of the slope is obtained through the data acquisition system.According to the statistics,it is found that 4 groups of bedding rock slopes under the action of seismic power,all show obvious elevation amplification effect and table amplification effect,and the greater the inclination of the rock layer in the slope,the more obvious the amplification effect of seismic wave acceleration.(3)The response law of 4 groups of bedding rock slopes with different rock inclination angles to natural seismic waves and sine waves is basically the same,and the frequency,amplitude of the seismic wave and the size of the rock inclination will all have different degrees of influence on the dynamic response law of the bedding rock slopes,but the impact on seismic wave loading is very limited.(4)Using FLAC3D finite difference software,four sets of numerical models of bedding rock slopes with different rock inclination angles were established correspondingly to perform dynamic calculations.It includes steps such as modeling,setting boundary conditions,selecting constitutive models,assigning physical and mechanical parameters,static calculations,and dynamic calculations.The calculation results show that the displacement and acceleration response are also consistent with the shaking table model test results.