Failure of Concrete-Face Sand-Gravel Dam Due to Water Flow Overtops
Publication: Journal of Performance of Constructed Facilities
Volume 33, Issue 2
Abstract
Based on field investigations and model tests on Gouhou concrete-face sand-gravel dam (CFSGD) breach case, a simplified numerical model for CFSGD breach was developed. The two major highlights of the model are the adoption of total-load nonequilibrium transport equation to simulate the erosion process of sand gravels with a wide range of gradation, and the establishment of an analogy to simulate the failure process of each concrete-face slab under various loads during the dam breaching process. The analysis of the case study of Gouhou dam breaching was used to verify the proposed model, and the results showed relative errors of less than for the output of breach parameters. The sensitivity analysis indicated that the soil erodibility and grain-size distribution significantly affect the prediction of breach flow of the dam.
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Acknowledgments
The research work was funded by the National Natural Science Foundation of China (Grant Nos. 51779153 and 51539006) and the Natural Science Foundation of Jiangsu Province (Grant No. BK20161121).
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Published In
Journal of Performance of Constructed Facilities
Volume 33 • Issue 2 • April 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jul 20, 2018
Accepted: Sep 13, 2018
Published online: Jan 18, 2019
Published in print: Apr 1, 2019
Discussion open until: Jun 18, 2019
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