Abstract
Soil samples of slide body and slide zone are obtained to study the strength parameters from a landslide in Yunnan Province, China. Firstly, the basic physical properties of the two soil samples are measured. Then geotechnical tests are performed to study the variation law of strength parameters under different water content by using the automatic KTG triaxial shear apparatus. The results show that the cohesion of soils rapidly reduces with water content increasing, and slowly reduces when plastic limit attains, and it seems that a turning point appears at the location of plastic limit.The relation of cohesion with water content approximately conforms to the exponential function, and the relation of internal friction angle with water content approximately conforms to the linear relation.
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