Study On Anti-seismic Technology For Bedding Rock Slope

Dynamic load, especially the seismic load, plays a very important part in making rockslope instable and fail, which has caused huge impact on the stability of rock slope. Althoughthe engineering technicians and researchers have taken a lot of reinforcement measures, thereare still a little research on the response of rock slope with discontinuity and all sorts ofreinforcement measures with the seismic loading, which is still in the primary stage. In thisthesis, based on the actual project, two slopes of different reinforcement measures are selectedto do comprehensive researches by shaking table test and finite element numerical simulation.Firstly, the shaking table was used to study the dynamic responses of model slopes withsine-wave accelerations as input. the relation between the discontinuity and slip plane of thebase rock with different thickness of the soil layers under vibration load function was found,which has verified the vertical uniform amplified effect due to slope on the vibration wave,the response pattern of slope on acceleration and the failure mode and the damage feature ofrock slope under vibration load. The effects of different reinforcement measures on seismicbehavior of slope were also obtained. As the test indicated, failure of slope under dynamicload often occurs at the upper and top part of the slope, and the features of the failure processcan be described as short time and long displacement. Rock and soil mass appears as flowingliquid, and when soil mass on the base rock is relatively thin, slip plane begins to germinatealong structure plane, conversely, slip plane may exists in soil mass.Secondly, the numerical simulation on the slope of baking project was conducted byusing the finite element software MIDAS-GTS. The research completed finite elementsimulation analysis on two sections in four conditions as follows, before reinforcement(deadweight), after reinforcement (deadweight), before reinforcement (seismic), afterreinforcement (seismic), and analyzes the parameters such as the displacement on the certainpart of the slope (slope plane, discontinuity, anti-slide pile, retaining wall, bolt, frame beam,et al), stress, maximum shear strain, acceleration, axial force, factor of safety and so on.According to the analysis, the effect of discontinuity of rock slope on the dynamic responsesof slope was known, corresponding relations between slope plane, displacement on thediscontinuity, stress, maximum shear strain, acceleration response and elevation. The verticaluniform amplified effect was verified under the earthquake input.Finally, it was concluded from the overall analysis that the whole mobile trend ofanti-slide pile and retaining wall with the slope gliding force effect can be divided into twotypes, i.e. rotation and translation. The reinforcement type of anti-slide pile together with boltframe is better than retaining wall with frame beam in increasing the effect of anti-seismiccapaciy the of rock slope. The range of anti-slide pile in reinforcing slope is wide, which is narrow as to bolt frame, but its effect is obvious, it can relatively well limit the slope planedisplacement in reinforcing slope; the effect of retaining wall is worse, slip plane is possibleto develop towards the lower part along the retaining wallAccording to the comparison among different methods in research and results ofdifferent conditions, some beneficial conclusions were got and can be referred to similarproject.