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Advances in Materials Science and Engineering
Volume 2018, Article ID 3293619, 7 pages
Research Article

Strength Characteristics and Slope Stability of Expansive Soil from Pingdingshan, China

1Henan University of Urban Construction, Pingdingshan, Henan, China
2Pingdingshan Government Water Saving Management Office, Pingdingshan, Henan, China

Correspondence should be addressed to Ju-yun Zhai; moc.qq@242626133

Received 10 November 2017; Accepted 25 December 2017; Published 25 February 2018

Academic Editor: João M. P. Q. Delgado

Copyright © 2018 Ju-yun Zhai and Xiang-yong Cai. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


By analyzing the characteristics of expansive soil from Pingdingshan, China, the shear strength parameters at different water contents, dry densities, and dry-wet cycles of expansive soil are obtained. It is found that, at higher soil-water content, the internal friction angle is 0° and the shallow layer of expansive soil slope will collapse and destroy; this has nothing to do with the height of the slope and the size of the slope. The parameters of soil influenced by atmosphere are the ones which have gone through dry-wet cycles, and the parameters of soil without atmospheric influence are the same as those of natural soil. In the analysis of slope stability, the shear strength parameters of soil can be determined by using the finite element method, and the stability coefficient of the expansive soil slope can be calculated.