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《The Chinese Journal of Geological Hazard and Control》 2014-01
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Mechanism of loess landslide induced by loading

CHEN Chun-li;LI Tong-lu;HE Kai;WANG Peng;Department of Geological Engineering,Chang'an University;  
In the loess area,spoil of construction excavation are always stacked on slope,which induced many loess landslides,and the loading-induced loess landslide has been a typical human-induced landslide in the Loess Plateau. Hence there are practical significances to study on its mechanism. Focus on a slope under loading condition in Yan'an,strength deformation characteristics of loess were got through the indoor test. Based on geological exploratory profile of the slope,numerical analysis models are established. The stress and strength change on the most dangerous slip surface of slope during loading are studied. The mechanical mechanism of occurrence and development of deformation and failure of loess landslide are revealed. The results show that loading on loess slope changed the stress distribution and the shear stress in middle and lower part of slope gradually came closed to the shear strength during loading,causing the stability of slope reduced until the landslide occurred in the end.
【Fund】: 国家自然科学基金项目(40972182);; 十二五国家科技支撑课题(2012BAK10B01)
【CateGory Index】: P642.22
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