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Study of Bojizhuang Landslide Mechanism and Stability Evaluation

Author: YanJunJun
Tutor: SunJinZhong；HanJinLiang
School: Chinese Geology University (Beijing)
Course: Geological Engineering
Keywords: Loess landslide Stability Numerical Simulation Strength Reduction Seepage
CLC: P642.22
Type: Master's thesis
Year: 2011
Downloads: 66
Quote: 0
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Abstract


Loess landslide is the the loess areas most serious geological disasters . Due to the the loess unique material composition and the nature of the works , the conditions and mechanism of formation of loess landslide showed the complexity and variability . In Baoji loess landslide hazard is more serious , serious threat to the normal production and life of the residents of the constraints of the local socio - economic development . Therefore, the Baoji loess landslide research , both theoretical significance , there are huge social benefits . In this paper, the scene investigation , laboratory experiments , numerical simulation , the technical means of the formation conditions of Chencang District the dustpan Zhuang landslide formation mechanism , steady state , and the degree of harm depth study , as follows : ( 1 ) the use of engineering geology knowledge analysis Chencang environmental and geological conditions , and development of Landslides and Chencang District temporal and spatial characteristics . The results show that the region landslide spatial distribution and group sex , and distribution of regional geomorphic units , most of loess landslide occurred related to the rainfall . ( 2 ) combined with the the dustpan Zhuang landslide basic characteristics , lithology, and indoor testing and other means , found that the topography , material composition , rainfall intensity and duration of the most important factor is the impact of the the dustpan Zhuang landslide steady state . Meteoric main role is to reduce the strength of the soil , increase soil bulk density and soften the potential sliding surface . Main trigger factors in the dustpan Zhuang landslide sliding mechanism is based on research that dustpan the Zhuang slopes initial deformation and failure of the previous edge collapse main deformation and failure twice after sliding failure deformation and damage , and high intensity of rainfall is twice . ( 3) Using FLAC 3D software to simulate the landslide formation process , in-depth analysis of the slide before the slope of stress - strain the case , verify that the landslide Forming Conditions and Mechanism . While G - Studio software simulation the dustpan Zhuang landslide seepage under rainfall conditions , the calculation results for a dustpan Zhuang landslide stability in a natural state , stability drastically reduced rainfall and persistent rainfall the dustpan Zhuang landslide stability . Can distinguish the area of the landslide is based on the numerical simulation of the displacement increment and the distribution of shear strain increment . (4) steady-state current for dustpan Zhuang landslide of dustpan Village is required to relocate their views and put forward some prevention recommendations .

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CLC: > Astronomy,Earth Sciences > Geology > Hydrogeology and Engineering Geology > Engineering Geology > The geological and engineering geological > Landslide
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