Seepage–Creep Coupling Analysis of Concrete-Face Rockfill Dam Built on Alluvium Foundation
Publication: International Journal of Geomechanics
Volume 23, Issue 11
Abstract
The foundation and dam body below the seepage-free surface are in a saturated seepage state for a concrete-face rockfill dam (CFRD) built on a deep alluvium foundation. The seepage and stress coupling effect could influence the dam deformation behavior. This study focuses on the seepage–creep coupling behavior of the CFRD on alluvium. The Drucker–Prager (D–P) plastic and time-hardening creep models are used to describe the instantaneous and creep deformations of rockfill and alluvium materials. The back propagation (BP) neural network method is adopted to invert the material creep model parameters. The dam and foundation seepage process is described using Signorini’s type variational inequality method. A seepage–creep coupling analysis method for CFRDs on alluvium is proposed on the basis of the momentum conservation principle and the Kozeny–Carman equation. The deformation mechanism and evolution process of CFRD on alluvium are investigated whilst considering the seepage–creep coupling effect. The influence of the seepage effect on the dam’ long-term deformation is discussed.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This study was supported by the National Natural Science Foundation of China (Grant Nos. 52039008 and 52125904) and the China Postdoctoral Science Foundation (Program Nos. 2021T140554 and 2020M683527).
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Published In
International Journal of Geomechanics
Volume 23 • Issue 11 • November 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Mar 3, 2023
Accepted: Jun 3, 2023
Published online: Sep 13, 2023
Published in print: Nov 1, 2023
Discussion open until: Feb 13, 2024
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