International Journal of Earth Sciences and Engineering

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Study on Wetting Deformation of Earth-Rockfill Dam Based on P-Z Model


Affiliations
1 Dike Safety and Disaster Prevention Engineering Technology Research Center of the Ministry of Water Resources, China
2 School of Water Conservancy, North China University of Water Resources and Electric Power/Collaborative Innovation Center of Water Resources Efficient Utilization and Protection Engineering, Henan Province, Zhengzhou, China
3 Lu Xu Construction Co., Ltd. of Henan Province, China
4 School of Water Conservancy, North China University of Water Resources and Electric Power/Collaborative Innovation Center of Water Resources Efficient Utilization and Protection Engineering, Henan Province, Zhengzhou, India
 

When earth-rockfill dam's coarse aggregates are immersed in water under certain stress, particles will be lubricated and immersed mineral particles will soften so they will slip against each other, break, and realign. Thus deformation will occur and the stress will redistribute in the soil mass. The deformation is called wetting deformation since it happens when dry soil becomes wet while the stress state remains unchanged. This paper studies the mechanism and analytical approach of wetting deformation. It devises a method for calculating wetting deformation based on single-line method and P-Z constitutive model and then applies the method to the static calculation of Shuangjiangkou earth-rockfill dam. It is proved that this method can reasonably reflect the influence of dam's wetting deformation on its general deformation during the storage period.

Keywords

Coarse Aggregates, Wetting Deformation, P-Z Model, Volumetric Strain, Axial Strain, Stress Level.
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  • Study on Wetting Deformation of Earth-Rockfill Dam Based on P-Z Model

Abstract Views: 118  |  PDF Views: 92

Authors

Hongyang Zhang
Dike Safety and Disaster Prevention Engineering Technology Research Center of the Ministry of Water Resources, China
Xianqi Zhang
School of Water Conservancy, North China University of Water Resources and Electric Power/Collaborative Innovation Center of Water Resources Efficient Utilization and Protection Engineering, Henan Province, Zhengzhou, China
Xu Li
Lu Xu Construction Co., Ltd. of Henan Province, China
Cundong Xu
School of Water Conservancy, North China University of Water Resources and Electric Power/Collaborative Innovation Center of Water Resources Efficient Utilization and Protection Engineering, Henan Province, Zhengzhou, India

Abstract


When earth-rockfill dam's coarse aggregates are immersed in water under certain stress, particles will be lubricated and immersed mineral particles will soften so they will slip against each other, break, and realign. Thus deformation will occur and the stress will redistribute in the soil mass. The deformation is called wetting deformation since it happens when dry soil becomes wet while the stress state remains unchanged. This paper studies the mechanism and analytical approach of wetting deformation. It devises a method for calculating wetting deformation based on single-line method and P-Z constitutive model and then applies the method to the static calculation of Shuangjiangkou earth-rockfill dam. It is proved that this method can reasonably reflect the influence of dam's wetting deformation on its general deformation during the storage period.

Keywords


Coarse Aggregates, Wetting Deformation, P-Z Model, Volumetric Strain, Axial Strain, Stress Level.