Abstract
Water is the most sensitive factor affecting the mechanical characteristics of rock and soil mass. The increase in the water ratio of unsaturated soil mass reduces both instantaneous strength and long-term strength of soils and changes the soil’s creep property. In view of the close correlation of rock and soil mass with water action and effects over time, this chapter presents the concept of “unsaturated soil creep” based on the theories of unsaturated soil mechanics and creep soil mechanics. An unsaturated soil creep triaxial apparatus has been researched and developed based on the basic principles used in the application of unsaturated soil triaxial apparatus and triaxial creep apparatus. The law of the impact of matrix suction on the creep characteristics of the soil mass in the Qianjiangping landslide in the Three Gorges area has been applied, and an unsaturated soil creep model that can reflect the impact of matrix suction has been established through tests using the apparatus. The research result has facilitated a new approach for analyzing the long-term strength and deformation of unsaturated soils and predicting the long-term stability of the landslide under the action of reservoir water fluctuation or rainfall.
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Acknowledgments
This research was funded by the Chinese Natural Science Foundation under Project 50879044 (Rheological Properties of Unsaturated Soils in Landslides. Project leader: Shimei WANG) and Project 50839004 (Mechanism, Risk Assessment and Disaster Mitigation on Landslides Triggered by Heavy Rainfall, Project Leader: Chuangbing ZHOU).
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Wang, S., Yin, Q. (2009). Unsaturated Creep Test and Modeling of Soils from the Sliding Zone of the Qianjiangping Landslide in the Three Gorges Area, China. In: Wang, F., Li, T. (eds) Landslide Disaster Mitigation in Three Gorges Reservoir, China. Environmental Science and Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-00132-1_10
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DOI: https://doi.org/10.1007/978-3-642-00132-1_10
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