Articles | Volume 6, issue 3
https://doi.org/10.5194/esurf-6-637-2018
https://doi.org/10.5194/esurf-6-637-2018
Research article
 | 
03 Aug 2018
Research article |  | 03 Aug 2018

Mechanical state of gravel soil in mobilization of rainfall-induced landslides in the Wenchuan seismic area, Sichuan province, China

Liping Liao, Yunchuan Yang, Zhiquan Yang, Yingyan Zhu, Jin Hu, and D. H. Steve Zou

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Cited articles

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Casagrande, A: Characteristics of cohesionless soils affecting the stability of slopes and earth fills, Journal of the Boston Society of Civil Engineers, 23, 13–32, 1936. 
Chen, N. S., Cui, P., Wang, X. Y., and Di, B. F.: Testing study on strength reduction of gravelly soil in triggering area of debris flow under earthquake, Chinese Journal of Rock Mechanics and Engineering, 23, 2743–2747, 2004 (in Chinese). 
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Chen, N. S., Zhu, Y. H., Huang, Q., Lqbal, J., Deng, M. F., and He, N.: Mechanisms involved in triggering debris flows within a cohesive gravel soil mass on a slope: a case in SW China, J. Mt. Sci., 14, 611–620, https://doi.org/10.1007/s11629-016-3882-x, 2017. 
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Short summary
In this paper, artificial model tests were used to observe the changes of soil moisture content and pore water pressure, as well as macroscopic and microscopic phenomena of gravel soil. In addition, the mathematical formula of the critical state was derived from the triaxial test data. Finally, the mechanical states of gravel soil were determined. In the process of landslide initiation, dilatation and contraction were two types of gravel soil state, but dilatation was dominant.