|Water Science and Engineering 2018, 11(1) 46-52 DOI: https://doi.org/10.1016/j.wse.2018.03.005 ISSN: 1674-2370 CN: 32-1785/TV|
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A simplified physically-based breach model for a high concrete-faced rockfill dam: A case study
Qi-ming Zhong a,b,*, Sheng-shui Chen a,b, Zhao Deng a
a Department of Geotechnical Engineering, Nanjing Hydraulic Research Institute, Nanjing 210024, China b Key Laboratory of Failure Mechanism and Safety Control Techniques of Earth-rock Dam of the Ministry of Water Resources, Nanjing 210024, China
A simplified physically-based model was developed to simulate the breaching process of the Gouhou concrete-faced rockfill dam (CFRD), which is the only breach case of a high CFRD in the world. Considering the dam height, a hydraulic method was chosen to simulate the initial scour position on the downstream slope, with the steepening of the downstream slope taken into account; a headcut erosion formula was adopted to simulate the backward erosion as well. The moment equilibrium method was utilized to calculate the ultimate length of a concrete slab under its self-weight and water loads. The calculated results of the Gouhou CFRD breach case show that the proposed model provides reasonable peak breach flow, final breach width, and failure time, with relative errors less than 15% as compared with the measured data. Sensitivity studies show that the outputs of the proposed model are more or less sensitive to different parameters. Three typical parametric models were compared with the proposed model, and the comparison demonstrates that the proposed physically-based breach model performs better and provides more detailed results than the parametric models.
|Keywords： Concrete-faced rockfill dam Physically-based breach model Parametric breach model Sensitivity analysis Gouhou CFRD|
|Received 2017-01-22 Revised 2017-08-08 Online: 2018-01-31|
This work was supported by the National Natural Science Foundation of China (Grants No. 51779153, 51539006, and 51509156) and the Natural Science Foundation of Jiangsu Province (Grant No. BK20161121).
|Corresponding Authors: firstname.lastname@example.org (Qi-ming Zhong)|
|About author: email@example.com (Qi-ming Zhong)|
ASCE/EWRI Task Committee on Dam/Levee Breach, 2011. Earthen embankment breaching. Journal of Hydraulic Engineering 137(12), 1549-1564. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000498.
Bennett, S.J., Alonso, C.V., Prasad, S.N., Römkens, M.J.M., 2000. Experiments on headcut growth and migration in concentrated flows typical of upland areas. Water Resources Research 36(7), 1911-1922. https://doi.org/10.1029/2000WR900067.
Cen, W.J, Zhang, Z.Q., Zhou, T., Yang, H.K., Lu, P.C., 2016. Maximum seismic capacity of a high concrete-face rockfill dam on alluvium deposit. Advances in Science and Technology of Water Resources 36(2), 1-5. https://doi.org/10.3880/j.issn.1006-7647.2016.02.001 (in Chinese).
Chen, S.S., 2012. Breach Mechanism and Simulation of Breach Process for Earth-rock Dams. China Water & Power Press, Beijing (in Chinese).
Chen, S.S., Cao, W., Huo, J.P., Zhong, Q.M., 2012. Numerical simulation for overtopping-induced break process of concrete-faced sandy gravel dams. Chinese Journal of Geotechnical Engineering 34(7), 1169-1175 (in Chinese).
Chen, S.S., 2015. Safety Problems of Earth and Rockfill Dams Subjected to Earthquakes. Science Press, Beijing (in Chinese).
Chen, S.S., Fu, Z.Z., Wei, K.M., Han, H.Q., 2016. Seismic responses of high concrete face rockfill dams: A case study. Water Science and Engineering 9(3), 195-204. https://doi.org/10.1016/j.wse.2016.09.002.
Du, X.H., Li, B., Chen, Z.Y., Wang, Y.J., Sun, P., 2015. Evaluations on the safety design standards for dams with extra height or cascade impacts, Part II: Slope stability of embankment dams. Chinese Journal of Hydraulic Engineering 46(6), 640-649. https://doi.org/10.13243/j.cnki.slxb.20150251 (in Chinese).
Froehlich, D.C., 1995a. Peak outflow from breached embankment dam. Journal of Water Resources Planning and Management 121(1), 90-97. https://doi.org/10.1061/(ASCE)0733-9496(1995)121:1(90).
Froehlich, D.C., 1995b. Embankment dam breach parameters revisited. In: Proceedings of the First International Conference on Water Resources Engineering. ASCE, New York, pp. 887-891.
Gurbuz, A., Peker, I., 2016. Monitored performance of a concrete-faced sand-gravel dam. Journal of Performance of Constructed Facilities 30(5), 04016011. https://doi.org/10.1061/(ASCE)CF.1943-5509.0000870.
Jia, J.S., Xu, Y., Hao, J.T., Zhang, L.M., 2016. Localizing and quantifying leakage through CFRDs. Journal of Geotechnical and Geoenvironmental Engineering 142(9), 06016007.
Li, J.C., 1995. A research for break of Gouhou face dam. Journal of Nanjing Hydraulic Research Institute (4), 425-434 (in Chinese).
Li, L., Sheng, J.B., 2000. Engineering behavior of gravel materials of Gouhou Dam. Journal of Nanjing Hydraulic Research Institute (3), 27-32 (in Chinese).
Li, N.H., Yang, Z.Y., 2012. Technical advances in concrete face rockfill dams in China. Chinese Journal of Geotechnical Engineering 34(8), 1361-1368 (in Chinese).
Liu, J., Ding, L.Q., Miao, L.J., Yang, K.H., 1998. Model test for dam breach of Gouhou concrete face sandy gravel dam. Chinese Journal of Hydraulic Engineering (11), 69-75 (in Chinese).
Mei, S.A., Huo, J.P., Zhong, Q.M., 2016. Determination of headcut migration parameters for homogeneous earth dam due to overtopping failure. Hydro-science and Engineering (2), 24-31. https://doi.org/10.16198/j.cnki.1009-640X.2016.02.004 (in Chinese).
Modares, M., Quiroz, J.E., 2016. Structural analysis framework for concrete-faced rockfill dams. International Journal of Geomechanics 16(1), 04015024. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000478.
Niu, X.Q., Tan, J.X., Tian, J.Z., 2016. Analysis on CFRD defect’s characteristics and its reinforcement. Yangtze River 47(13), 1-5. https://doi.org/10.16232/j.cnki.1001-4179.2016.13.001 (in Chinese).
Robinson, K.M., 1996. Gully Erosion and Headcut Advance. Ph. D. Dissertation. Oklahoma State University, Stillwater.
Sherard, J.L., Cooke, J.B., 1987. Concrete-face rockfill dam, I: Assessment. Journal of Geotechnical Engineering 113(10), 1096-1112. https://doi.org/10.1061/(ASCE)0733-9410(1984)110:10(1381).
Temple, D.M., 1992. Estimating flood damage to vegetated deep soil spillways. Applied Engineering in Agriculture 8(2), 237-242. https://doi.org/10.13031/2013.26059.
U.S. Bureau of Reclamation (USBR), 1982. Guidelines for Defining Inundated Areas Downstream from Bureau of Reclamation Dams, Reclamation Planning Instruction No. 82-11. U.S. Bureau of Reclamation, U.S. Department of the Interior, Denver.
U.S. Bureau of Reclamation (USBR), 1988. Downstream Hazard Classification Guidelines, ACER Tech. Memorandum No. 11. U.S. Bureau of Reclamation, U.S. Department of the Interior, Denver.
U.S. Department of Agriculture, Natural Resources Conservation Service (USDA-NRCS), 1997. Earth Spillway Erosion Model, Chapter 51, Part 628 Dams, National Engineering Handbook. U.S. Department of Agriculture, Natural Resources Conservation Service of the United States, Washington, D. C.
Visser, P.J., 1998. Breach Growth in Sand-dikes. Ph. D. Dissertation. Delft University of Technology, Delft.
Wahl, T.L., 1998. Prediction of embankment dam breach parameters: A literature review and needs assessment. In: Dam Safety Report No. DSO-98-004. U.S. Bureau of Reclamation, U.S. Department of the Interior, Denver.
Wu, W., 2013. Simplified physically based model of earthen embankment breaching. Journal of Hydraulic Engineering 139(8), 837-851. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000741.
Xie, Y.L., Zhu, Y.H., Guo, X.L., 2013. Advances and problems in earth-dam failure research. Journal of Yangtze River Scientific Research Institute 30(4), 29-33. https://doi.org/10.3969/j.issn.1001-5485.2013.04.007 (in Chinese).
Xu, Y., Zhang, L.M., 2009. Breaching parameters for earth and rockfill dams. Journal of Geotechnical and Geoenvironmental Engineering 135(12), 1957-1969. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000162.
Xu, Y., 2010. Analysis of Dam Failures and Diagnosis of Distresses for Dam Rehabilitation. Ph. D. Dissertation. The Hong Kong University of Science and Technology, Hong Kong.
Yang, Q. G., Tan, J.X., Zhou, X.M., Gao, D.X., 2016. Discussion on several issues of concrete face rock-fill dam. Yangtze River 47(2), 62-66. https://doi.org/10.16232/j.cnki.1001-4179.2016.14.013 (in Chinese).
Zhong, Q.M., Wu, W.M., Chen, S.S., Wang, M., 2016. Comparison of simplified physically based dam breach models. Natural Hazards 84(2), 1385-1418. https://doi.org/10.1007/s11069-016-2492-9.
Zhou, J.P., Wang, H., Chen, Z.Y., Zhou, X.B., Li, B., 2015a. Evaluations on the safety design standards for dams with extra height or cascade impacts, Part I: Fundamentals and criteria. Chinese Journal of Hydraulic Engineering 46(5), 505-514. https://doi.org/10.13243/j.cnki.slxb.20150249 (in Chinese).
Zhou, X.B., Chen, Z.Y., Huang, Y.F., Wang, L., Li, X.N., 2015b. Evaluations on safety design standards for dams with extra height or cascade impacts, Part III: Risk analysis of embankment break in cascade. Chinese Journal of Hydraulic Engineering 46(7), 765-772. https://doi.org/10.13243/j.cnki.slxb.20150252 (in Chinese).
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