Consolidation Analysis of Nuozhadu High Earth-Rockfill Dam Based on the Coupling of Seepage and Stress-Deformation Physical State
Publication: International Journal of Geomechanics
Volume 16, Issue 3
Abstract
A consolidation analysis method for an earth-rockfill dam based on the coupling of physical state, stress deformation, and seepage was established. In this method, a permeability coefficient model considering physical state and shear stress level was introduced, and it was integrated with Biot’s consolidation theory to simulate the coupling relationship. Taking the Nuozhadu high earth-rockfill dam as an example, a parameter back-analysis method using a neural network and evolutionary algorithm was applied to back-analyze the permeability coefficient model parameters of the core material based on observation data of pore water pressure in the dam. Then, consolidation numerical analyses were performed by using the back-analyzed parameters and the constant permeability measured in situ, respectively. The spatial and temporal distribution of pore water pressure calculated by the back-analyzed parameters coincided quite well with the monitoring data during construction and operation. However, the numerical results with constant permeability are different from the observed values, which indicates that the permeability coefficient model and the consolidation analysis method can be applied effectively, reasonably, and necessarily to numerical simulations for high earth-rockfill dams.
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Acknowledgments
The authors appreciate the financial support of the National Natural Science Foundation of China (Grants 51179092 and 51379103) and the State Key Laboratory of Hydroscience and Engineering Project 2013-KY-4.
References
Biot, M. A. (1941). “General theory of three-dimensional consolidation.” J. Appl. Phys., 12(2), 155–164.
Biot, M. A. (1955). “Theory of elasticity and consolidation for a porous anisotropic solid.” J. Appl. Phys., 26(2), 182–185.
Carpenter, G. W., and Stephenson, R. W. (1986). “Permeability testing in the triaxial cell.” Geotech. Test. J., 9(1), 3–9.
Chen, L., Chen, Z., and Zhang, J. (2005). “Study on high pore pressure in clay core wall of earth dam in Xiaolangdi Project.” J. Hydraul. Eng., 36(2), 219–224 (in Chinese).
Chu, J., Bo, M., Chang, M., and Choa, V. (2002). “Consolidation and permeability properties of Singapore marine clay.” J. Geotech. Geoenviron. Eng., 724–732.
Duncan, J. M., Byrne, P., Wong, K. S., and Mabry, P. (1980). “Strength, stress-strain and bulk modulus parameters for finite element analysis of stresses and movements in soil masses.” Rep. No. UCB/GT/80-01, Univ. of California, Berkeley, CA.
Duncan, J. M., and Chang, C. Y. (1970). “Nonlinear analysis of stress and strain in soils.” J. Soil Mech. Found. Div., 96(5), 1629–1653.
Elia, G., Amorosi, A., Chan, A. H., and Kavvadas, M. J. (2011). “Numerical prediction of the dynamic behavior of two earth dams in Italy using a fully coupled nonlinear approach.” Int. J. Geomech., 504–518.
Feng, X., Zhao, H., and Li, S. (2004). “A new displacement back analysis to identify mechanical geo-material parameters based on hybrid intelligent methodology.” Int. J. Numer. Anal. Methods Geomech., 28(11), 1141–1165.
Huang, J., Griffiths, D., and Fenton, G. (2010). “Probabilistic analysis of coupled soil consolidation.” J. Geotech. Geoenviron. Eng., 417–430.
Kodikara, J. K., and Rahman, F. (2002). “Effects of specimen consolidation on the laboratory hydraulic conductivity measurement.” Can. Geotech. J., 39(4), 908–923.
Lei, H. (2010). “A study on seepage characteristics of clayey soil of high earth-rockfill dam with large shear deformation.” Ph.D. thesis, Tsinghua Univ., Beijing (in Chinese).
Lei, H., Wu, Y., Yu, Y., Zhang, B., and Lv, H. (2015). “Influence of shear on the permeability of clayey soil.” J. Geomech., in press.
Luo, Z., Liu, J., and Li, L. (2008). “Three-dimensional full coupling numerical simulation of groundwater dewatering and land-subsidence in quaternary loose sediments.” Chin. J. Geotech. Eng., 30(2), 193–198 (in Chinese).
Mesri, G. (1971). “Mechanisms controlling the permeability of clays.” Clays Clay Miner., 19(3), 151–158.
Nagaraj, T., Pandian, N., and Narasimha Raju, P. S. R. (1993). “Stress state-permeability relationships for fine-grained soils.” Géotechnique, 43(2), 333–336.
Sakurai, S., and Takeuchi, K. (1983). “Back analysis of measured displacements of tunnels.” Rock Mech. Rock Eng., 16(3), 173–180.
Samarasinghe, A. M., Huang, Y. H., and Drnevich, V. P. (1982). “Permeability and consolidation of normally consolidated soils.” J. Geotech. Eng. Div., 108(6), 835–850.
Swoboda, G., Ichikawa, Y., Dong, Q. X., and Zaki, M. (1999). “Back analysis of large geotechnical models.” Int. J. Numer. Anal. Methods Geomech., 23(13), 1455–1472.
Wu, Y., Yuan, H., Zhang, B., Zhang, Z., and Yu, Y. (2014). “Displacement-based back-analysis of the model parameters of the Nuozhadu high earth-rockfill dam.” Scientific World J., 2014, 1–10.
Xie, K., Zhuang, Y., and Li, X. (2005). “Laboratory investigation of permeability characteristics of Xiaoshan clay.” Chin. J. Geotech. Eng., 27(5), 591–594 (in Chinese).
Yao, W., Liu, Y., and Chen, J. (2012). “Characteristics of negative skin friction for superlong piles under surcharge loading.” Int. J. Geomech., 90–97.
Yu, Y. Z., Zhang, B. Y., and Yuan, H. I. (2007). “An intelligent displacement back-analysis method for earth-rockfill dams.” Comput. Geotech., 34(6), 423–434.
Zhang, B., Yuan, H., and Li, Q. (2005). “Displacement back analysis of embankment dam based on neural network and evolutionary algorithm.” Rock Soil Mech., 26(4), 547–552 (in Chinese).
Zhang, L. Q., Yue, Z. Q., Yang, Z. F., Qi, J. X., and Liu, F. C. (2006). “A displacement-based back-analysis method for rock mass modulus and horizontal in situ stress in tunneling. Illustrated with a case study.” Tunnelling Underground Space Technol., 21(6), 636–649.
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Published In
International Journal of Geomechanics
Volume 16 • Issue 3 • June 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Oct 28, 2014
Accepted: Jun 10, 2015
Published online: Dec 30, 2015
Discussion open until: May 30, 2016
Published in print: Jun 1, 2016
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