Stability Analysis Of The Rock Slope For The Central Locked Section

High Rock Slope is the main geological environment of the mountain constructionand engineering carrier, high slope has almost become the first engineering geologicalproblems in major construction, especially in southwest China. Due to the specialgeographical and geological environmental conditions, the southwest China is mostlyalpine canyon. Slope shape and slope structure are complex, and the tectonic fault isdevelopment, also the erath stress is of high level. High slope stability in theconstruction of large-scale infrastructure projects and urbanization is the particularlyprominent problem. The damage of high slope stability is greater than the average slope;The high slope is almost rocky, due to the physical characteristics of the rock itself, thedestructive effects of the rock is greater than the soil slope. The locking segment rockslope is relative to the better strength, which with a certain part of this rock bridge playsa key role in the control of the stability.The paper relies on instructor’s geological disaster prevention and GeologicalEnvironment Protection State Key Laboratory Fund (No.SKLGP2011K003,2011.1~2012.12): the locking segment type landslide aging process and stability evaluationresearch. On the basis of the structural study of the slope of the central locking segmenttype, by the simulation to the typical central locking segement landslides (the Chanalandslide, Sichuan Xikou landslide) to verify the the mechanical process of thedestruction of the slope and the conceptual models, and has analysised the affectingfactors of the stability of the central locking landslide. The research results have sometheoretical significance and application value for the disaster prevention and control,and the high rock slope stability evaluation.In this paper, main tasks are as follows:①Chana landslide, the Xikou landslide terrain geological conditions weresummarized in terms of topography, geological structure, hydrogeological, formationlithology statistics, and on this basis, has analysised central locking segment typicallandslide.②On the basis of the classification, combined with the engineering and researchresults, the actual geological of the Chana landslide, Xikou landslide slope areanalysised, and in order to establish a computational model, using the finite differencesoftware FLAC3D to simulation the failure process of Chana landslide and Xikou landslide, and validate the conceptual model of the "three-step" landslide and "retainingwall buckling" landslide.③Based on the finite element geomechanical mechanism, a single factor variablefactors that affect the central locking segment type landslide stability sensitive isanalysised. With slope deformation, stress analysis, to explore the "three-step" landslidecrack’s width, depth, strength parameters and retaining wall buckling type landslide’sthickness, strength parameters.