Deformation And Failure Mode Of Slope And Mechanism Analysis In Yaozhou District

Yaozhou district is located in the south edge of Loess Plateau, it is the border zone of theGuanzhong Plain and Weibei Plateau, Surface topography broken, Coupled with a largesurface area is covered by loess, special geological conditions lead to frequent geologicaldisasters of the study area. The most widely distributed, the largest number of the potentialimpact of the largest, undoubtedly the slope class of geological disasters. How to determinethe effects of geological disasters? How do I select the Disaster Management? This has beenthe difficult problems faced by many scholars and disaster prevention managers. To resolvethis problem, identify the slope deformation and failure mode is essential. Therefore, thisarticle from relying on the land resources survey project, the actual survey data as the basis,divided on the type of deformation and failure mode of the study area slopes, and study themechanism of its deformation and failure process, the research results provide an importanttheoretical basis for the protection and control of geological disasters in the study area.Firstly, it is based on the analysis of the study area physical geography, topography,lithology, geological structure, hydrogeology, rock type and their engineering geologicalproperties of human engineering activities, The analysis derived slopes of the study area aremainly three kinds of deformation and failure of the geomechanical model.Secondly, the papers by a combination of theoretical analysis and numerical simulationmethod, the focus of research in the study area three main deformation mechanism andprocess failure modes. The research was supported by the following results:(1) Sliding-creepand fracturing mostly occurs in the contact surface of the slope of loess and bedrock. Suchdeformation and failure by the weak structural surface control is very sensitive to water. Slopedeformation and failure process, the leading edge of the slope under pressure, it’s the trailingedge of the pull. The slope from top to bottom to pull the crack, occurrence of damage to theformation of landslides when the cracks through the slope.(2) Sliding and compressioncracking mode is more common in the loess plateau edge, due to the presence of as animpermeable layer of paleosol, resulting in the upper soil bulk density increasing. Thisparticular rock mass structure causes slopes occurs first fracturing, and then slip. The generaldevelopment of cracks as the bottom-up, it is formed after through the slope of sliding surface,the upper soil occurred at a lower speed and slip, and finally the formation of the landslide.(3)Bending and fracturing more common in the erosion of the shore side of the rocky slopes inthe valley. The rock structure of the study area are mostly of sandstone and mudstoneinterbedded, the difference between weathering lead to the formation of the rock cavity. When the sandstone layer is thinner, the layer of sandstone as a cantilever to Bending and fracturing,When the sandstone layer is thick, sandstone as the rock pillars to Bending and fracturing.Finally, based on slope deformation and failure process and its mechanism, For differenttypes of slopes proposed corresponds to the initial Countermeasures, use entropy weightmulti-objective decision method to select the best Countermeasures, determine the programhave a higher credibility.