Experimental analysis of shear strength of undisturbed soil in leucaena forest in Jiangjia Ravine,Yunnan, China |
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| Authors: | Zhen Jiao Daojie Wang Hong Xie Jinshan Zhang Linghui Guo |
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| Institution: | JIAO Zhen 1,2,3,WANG Daojie 1,XIE Hong 1,ZHANG Jinshan 1,GUO Linghui1,3 1 Key Laboratory of Mountain Hazards and earth surface processes,Chinese Academy of Sciences,Chengdu 610041,China 2 Graduate University of Chinese Academy of Sciences,Beijing 1 00049,China 3 Institute of Mountain Hazards and Environment,Chinese Academy of Science,China |
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| Abstract: | Five leucaena trees of similar age were chosen in Jiangjia Ravine of Dongchuan, Yunnan Province, China, near which the soil samples were
collected by digging profiles 2m in depth and 1m in width. In each section, soil samples at different depths were taken for
direct shear experiments to determine the root amount and mechanical composition. It is found that the cohesion and internal
friction angle of the undisturbed soil are related to the root amount, depth, clay content and breccias content. Cohesion
correlates negatively with root content, a finding that differs from that of other researchers. In addition, internal friction
angle correlates positively with all these factors. |
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| Keywords: | Jiangjia Ravine Leucaena Undisturbed soil Shear strength Impact factors |
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