Analysis Of Slope Rock Mass Under Seismic Loading Loosening Depth

Loose rock slope under the influence of factors is due to earthquake, blasting andexcavation unloading, causing rock stress redistribution, resulting in the phenomenonof rock deformation and fracture, even under the influence of external factors such asgroundwater will appear collapse occurred, landslides, mudslides and other geologicaldisasters. Earthquake is one of the world’s serious geological disasters faced by manycountries, the same is true for our country,8.0Wen chuan earthquake occurred in2008to local residents caused huge human casualties and property losses. After theearthquake, the traffic rush informed through, both for the initial earthquake emergencyrescue, or for disaster recovery and reconstruction after the earthquake, are crucial.Through earthquake traffic scene reconnaissance found that the slope of loose rock tableearthquake, earthquake ground water under the influence of external factors such easilyalong the depth of the damage occurred again, seriously affect the safety of traffic. So,how simple and effective to determine the slope of loose rock after the earthquake depthassessment to detect and repair and reinforcement work for the safety of the road afterthe earthquake engineering facilities and lay a solid foundation to becomepost-earthquake recovery and reconstruction phase of the road facing important subject.Unfortunately, after inspection by the Chinese and foreign literature, research has notbeen found on the slope of loose under earthquake area. To this end, the paper theoryand engineering reality, focused on the following main elements:1)In the earthquake affected areas,through the engineering geological conditionsof the scene,as well as the characteristics and deformation characteristics of lopeinstability is analyze that,the geometric characteristics of the slop,to topography andseismic properties of the rock slope reaction as a close relationship.2)The literature review found that loosing depth study of slope in theearthquake,and others by means of Run unloading band theory.FLAC using dynamicfinite element soft ware on the basis of the theory of numerical simulation analysis ofslope under earthquake research focused on topography, slope material and threedynamic load condition by changing the slope of each slope,slope height,materialproperties and loading conditions such as the frequency and mp latitude of the groundmotion to explore the plastic zone and distribution of the slope by the tension zone,inorder to determine the depth of earthquake loose slope. 3)Using seismic face wave technology to detect slope loose areas.Becauseexisting norms get technical division(closely related to the wave velocity and soilphysical parameters) based on soils hear wave velocity,so from the wave velocity andsoil physical depth of colors very easy to geta sectional view of the test section of rocklayers.The over all distribution,through and ultrasonic testing,on-site drilling datacomparison,the use of surface wave method to determine the depth of the seismic slopeloose establish physical indicators loose correlation between the depth,proposes areliable and feasible,simple detection method.