Study Of Mechanics Behavior And Properties Of Landslide Soil Via Laboratory Test

As an important part of landslide, slip soils are close relation with landslide development, deformation and its stability analysis, therefore, study on the physical and mechanical properties of slip soils usually become a necessary part of the landslides research.Based on the collected the related slide soil physical and mechanical properties of research literature material, knowing the slide soil current research status and existing problems, and on the basis of landslide in ChongQing area of common slide soil as the object, have great study on mechanics behavior and properties of landslide soil via laboratory test. In the laboratory tests, using the orthogonal design and testing scheme were chosen and optimization;the experimental results were systematically analyzed by the data statistic regression analysis theory and variance analysis method. Finally, wih the Wangjiawan landslide in Guangyuan,Sichuan,Province as as a case,have a great analyzes the soil mechanics properties of landslide affect on landslide preventive treatment.This thesis research contents and obtains the research achievements, mainly for:①Through the laboratory test,tested two landslide soil physical properties and particle composition, obtained the physical properties of parameters and particle distribution rule of the slide soil.②Through the laboratory triaxial shea test, Study of? mechanics behavior and properties of the single landslide soil in different moisture conditions,? the results showed that?peak shear strength with moisture content rise gradually reduced and with Confining pressure rise gradually increased. Meanwhile, based on orthogonal design and test method, the impact factor mechanics behavior and properties of compound landslide soil were studied. The test results wre analyzed by the variance analysis method. The test results showed that among factors the water content of interlayer soil is the greatest influence to the shear strength of landslide soil,then interlayer thickness also has a certain effect.?Finally, the study on the same conditions of the moisture content of small, different diameters of rubble slide soil strength the effects of parameters, and the results showed that the cohesion with gravel size bigger gradually increasing, while internal friction Angle criterion gradually decreases, Meanwhile the shear strength with gravel size bigger and show increased-peak-reduced。 ③Using the laboratory direct shear and compresstion test, Study on different soils from the slide zones in different water content , the changing rules and compression characteristics the shear strength of the landslide. The results showed: the water content of the slide soil have great influence on shear strength, but with the water content rise, the shear strength (internal friction angleφand cohesion c) change rules are different, the cohesion c have a best water content.The s Single slide soil of direct shear test results and the triaxial shear test results are basically the same. Through compression test, we found the compression coefficient ( a v) wih the water contents rise gradually increased, modulus of compression with the water content rise gradually decreased.④with the Wangjiawan landslide in Guangyuan,Sichuan,Province as a case,on the base of the physical and mechanical properties of this sliding soil, studies showed that the strength of slide soil have greatest effect on the parameters for the stability of the landslide.The landslide soil is the main component of the slip mass and mechanics Behavior and properties of landslide soil have a crucial role on landslide stability analysis and landslide preventive treatment. The research results showed that control the landslide range of surfacewater and groundwater is the most effective measures in landslide preventive treatment.Therefore, Study of mechanics behavior and properties of landslide soil not only have significant theoretical value, but also have important practical significance.