Study On The Dynamic Response And Stability Of High Steep Rock Slope Under Seismic Load

Slope engineering is a important research topic in the field of geologicalengineering, involving the aspects of more widely, the static calculation method used tocalculate the rock slope stability has been relatively mature, but the dynamic analysis ofslope stability research is not mature enough. Related field is presented in this paper, onthe basis of existing research results, Relying on the science and technology projects inYun-nan province：the strong earthquakes in Yun-nan mountainous secondary highwayconstruction low cost for appropriate technology and engineering technologydemonstration， in view of the high and steep rock slope of dynamic response andstability under seismic load, has carried out some preliminary research work:1. According to the different types and characteristics of high and steep slope,compared to traditional slope protection scheme, low-cost protection technologyscheme of the slope protection is given.2. According to the principle of dynamic time history analysis, by the ANSYS finiteelement program, has analyzed the dynamic response laws under seismic load for theordinary rock slope and with the weak intercalations in rock slope, and reveal thedeformation of slope under seismic action, speed, acceleration and stress distributioncharacteristics. Has analyzes the slope height, slope Angle, the weak structural planeAngle and thickness influence on slope stability. Using synthetic seismic wave input asthe slope dynamic stability evaluation, and by the dynamic safety coefficient, thestability analysis of high and steep slope under seismic load is proceed.3. Using a nonlinear elastoplastic model, based on Mohr-coulomb area yieldcriterion of strength theory, slope support under the static state and dynamic state beforeand after the displacement, velocity and stress and strain analysis,had a numericalsimulation for the anchor frame structure and the interaction of slope rock mass, haveanalyzed the axial force, shear stress and shear strain of anchor rod which was throughthe control of the anchor bolt length in the system.the conclusion is beneficial, use therockbolt and shotcrete has certain guiding significance to the optimization design on theslope engineering support.4. Reinforcement effect produced by prestressed anchor cable frame structure fordifferent diseases have different characteristics, according to the differentcharacteristics, refer to the results of numerical simulation, for the collapse and the landslide, and put forward the regulation measures corresponding to different slopedisasters, and gives the proposal of engineering example.