Water Science and Engineering 2018, 11(3) 250-257 DOI:   https://doi.org/10.1016/j.wse.2018.10.004  ISSN: 1674-2370 CN: 32-1785/TV

Current Issue | Archive | Search                                                            [Print]   [Close]
Information and Service
This Article
Supporting info
PDF(3736KB)
Reference
Service and feedback
Email this article to a colleague
Add to Bookshelf
Add to Citation Manager
Cite This Article
Email Alert
Keywords
Concrete-faced rockfill dam (CFRD)
Generalized equivalent continuum model
Node virtual flow method
Fractured rock mass
Seepage field
Seepage coefficient
Authors
PubMed

Seepage simulation of high concrete-faced rockfill dams based on generalized equivalent continuum model

Shou-kai Chena, b, c, d, Qi-dong Hea, b, d, *, Ji-gang Caoa

a School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
b Henan Key Laboratory of Water Environment Simulation and Treatment, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
c Academician Workstation of Water Environment Governance and Ecological Restoration, Zhengzhou 450002, China
d Collaborative Innovation Center of Water Resources Efficient Utilization and Protection Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China

Abstract

This research focused on the three-dimensional (3D) seepage field simulation of a high concrete-faced rockfill dam (CFRD) under complex hydraulic conditions. A generalized equivalent continuum model of fractured rock mass was used for equivalent continuous seepage field analysis based on the improved node virtual flow method. Using a high CFRD as an example, the generalized equivalent continuum range was determined, and a finite element model was established based on the terrain and geological conditions, as well as structural face characteristics of the dam area. The equivalent seepage coefficients of different material zones or positions in the dam foundation were calculated with the Snow model or inverse analysis. Then, the 3D seepage field in the dam area was calculated under the normal water storage conditions, and the corresponding water head distribution, seepage flow, seepage gradient, and seepage characteristics in the dam area were analyzed. The results show that the generalized equivalent continuum model can effectively simulate overall seepage patterns of the CFRD under complex hydraulic conditions and provide a reference for seepage analysis of similar CFRDs.

Keywords Concrete-faced rockfill dam (CFRD)   Generalized equivalent continuum model   Node virtual flow method   Fractured rock mass   Seepage field   Seepage coefficient  
Received 2017-10-10 Revised 2018-05-24 Online: 2018-07-30 
DOI: https://doi.org/10.1016/j.wse.2018.10.004
Fund:

This work was supported by the National Natural Science Youth Foundation of China (Grant No. 51309101), the Henan Province Major Scientific and Technological Projects (Grant No. 172102210372), and the Cooperative Project of Production, Teaching and Research in Henan Province (Grant No. 18210700031).

Corresponding Authors: Qi-dong He
Email: E-mail address: Rituy@foxmail.com
About author:

References:

Chen, S.K., Yan, J., Li, J.M., 2011a. Seepage field 3D finite element simulation of concrete faced rockfill dam under failure condition of vertical fracture. Rock Soil Mechanics, 32(11), 3473-3478. https://doi.org/10.3969/j.issn.1000-7598.2011.11.045 (in Chinese).
Chen, S.K., Liu, S.W., Guo, L.X., Yan, J., Xie, Z.Q., 2012. 3-D finite element method of seepage field of middle-small earth-rock dam and its application. Journal of Basic Science and Engineering, 20(4), 612-621. https://doi.org/10.3969/j.issn.1005-0930.2012.08.007 (in Chinese).
Chen, S.K., Zhang, X.Y., 2016. Seepage control in a high concrete face-rockfill dam based on the node virtual flow method. The Open Construction and Building Technology Journal, 10, 547-560. https://doi.org/10.2174/1874836801610010547.
Chen, Y.F, Hu, R., Lu, W.B., Li, D.Q., Zhou, C.B., 2011b. Modeling coupled processes of non-steady seepage flow and non-linear deformation for a concrete-faced rockfill dam. Computers and Structures, 89(13–14), 1333-1351. https://doi.org/10.1016/j.compstruc.2011.03.012.
Choo, Y.W., Shin, D.H., Cho, S.E., Im, E.S., Kim, D.S., 2013. Seepage behavior of drainage zoning in a concrete faced gravel-fill dam via centrifuge and numerical modeling. KSCE Journal of Civil Engineering, 17(5), 949-958. https://doi.org/10.1007/s12205-013-0215-2.
Gan, L., Shen, X.Z., Qing, W.W., 2017. Seepage analysis of concrete face rockfill dam for material damage of water stop structure. Key Engineering Materials, 729, 93-98. https://doi.org/10.4028/www.scientific.net/KEM.729.93.
Guo, Q.Q., Han, Z., Zhang, S.H., Li, Y.G., 2016. Comprehensive analysis on seepage and structural stability of earth-rock dam: A case study of Xiquanyan Dam in China. The Civil Engineering Journal, 25(2). https://doi.org/10.14311/CEJ.2016.02.0009.
Hu, Z., Yang, Z.X., Wilkinson, S.P., 2017. Active earth pressure acting on retaining wall considering anisotropic seepage effect. Journal of Mountain Science, 14(6), 1202-1211. https://doi.org/10.1007/s11629-016-4014-3.
Kazemzadeh-Parsi, M.J., Daneshmand, F., 2012. Unconfined seepage analysis in earth dams using smoothed fixed grid finite element method. International Journal for Numerical and Analytical Methods in Geomechanics, 36(6), 780–797. https://doi.org/10.1002/nag.1029.
Larese, A., Rossi, R., Oñate, E., 2014. Finite element modeling of free surface flow in variable porosity media. Archives of Computational Methods in Engineering, 22(4), 1-17. https://doi.org/10.1007/s11831-014-9140-x.
Li, N.H., 2011. New concept of design for high concrete face rockfill dams. Engineering Science, 13(3), 12-18. https://doi.org/10.3969/j.issn.1009-1742.2011.03.002 (in Chinese).
Li, P., Lu, W.X., Yang, W., Li, J., 2007. Determination of hydraulic conductivity tensor of fractured rock mass in reservoir. Journal of Hydraulic Engineering, 38(11), 1393-1396. https://doi.org/10.3321/j.issn:0559-9350.2007.11.021 (in Chinese).
Rafiezadeh, K., Ataie-Ashtiani, B., 2014. Transient free-surface seepage in three-dimensional general anisotropic media by BEM. Engineering Analysis with Boundary Elements, 46(46), 51-66. https://doi.org/10.1016/j.enganabound.2014.04.025.
Ren, J., Shen, Z.Z., Yang, J., Yu, C.Z., 2016. Back analysis of the 3D seepage problem and its engineering applications. Environmental Earth Sciences, 75(2), 1-8. https://doi.org/10.1007/s12665-015-4837-1.
Tan, X.H, Wang, X., Khoshnevisan, S., Hou, X.L., Zha, F.S., 2017. Seepage analysis of earth dams considering spatial variability of hydraulic parameters. Engineering Geology, 228, 260-269. https://doi.org/10.1016/j.enggeo.2017.08.018.
Wang, P., Qiao, L., Li, C.H., Cai, M.F., 2003. Equivalent continuum model and its application to the seepage field of rock slope. Journal of University of Science and Technology Beijing, 25(2), 99-102. https://doi.org/10.3321/j.issn:1001-053X.2003.02.001 (in Chinese).
Xiang, Y., Wang, L., Wu, S.S, Yuan, H., Wang, Z.J., 2015. Seepage analysis of the fractured rock mass in the foundation of the main dam of the Xiaolangdi water control project. Environmental Earth Sciences, 74(5), 4453-4468. https://doi.org/10.1007/s12665-015-4445-0.
Xu, B., Zou, D.G., Liu, H.B., 2012. Three-dimensional simulation of the construction process of the Zipingpu Concrete Face Rockfill Dam based on a generalized plasticity model. Computers and Geotechnics, 43(6), 143-154. https://doi.org/10.1016/j.compgeo.2012.03.002.
Zhang, Q.F., Wu, Z.R., 2005. The improved cut-off negative pressure method for unsteady seepage flow with free surface. Journal of Geotechnical Engineering, 27(1), 48-54. https://doi.org/10.3321/j.issn:1000-4548.2005.01.007 (in Chinese).
Zhou, C.B., Liu, W., Chen, Y.F., Hu, R., Wei, K., 2015. Inverse modeling of leakage through a rockfill dam foundation during its construction stage using transient flow model, neural network and genetic algorithm. Engineering Geology, 187, 183-195. https://doi.org/10.1016/j.enggeo.2015.01.008.

Similar articles
1.

Ya-jun WANG*1, 2;Wo-hua ZHANG1, 2;Chang-yu WU3;Da-chun REN3

.Three-dimensional stochastic seepage field for embankment engineering[J]. Water Science and Engineering, 2009,2(1): 58-73
2. Ming-chao Li, Xin-yu Guo, Jonathan Shi, Ze-biao Zhu.Seepage and stress analysis of anti-seepage structures constructed with different concrete materials in an RCC gravity dam[J]. Water Science and Engineering, 2015,8(4): 326-334

Copyright by Water Science and Engineering