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Deformation analysis of high CFRD considering the scaling effects

  • Sukkarak, Raksiri (Department of Civil Engineering, King Mongkut's University of Technology Thonburi) ;
  • Pramthawee, Pornthap (Department of Civil Engineering, King Mongkut's University of Technology Thonburi) ;
  • Jongpradist, Pornkasem (Department of Civil Engineering, King Mongkut's University of Technology Thonburi) ;
  • Kongkitkul, Warat (Department of Civil Engineering, King Mongkut's University of Technology Thonburi) ;
  • Jamsawang, Pitthaya (Department of Civil Engineering, Soil Engineering Research Center, King Mongkut's University of Technology North Bangkok)
  • Received : 2017.01.23
  • Accepted : 2017.07.13
  • Published : 2018.02.28

Abstract

In this paper, a predictive method accounting for the scaling effects of rockfill materials in the numerical deformation analysis of rockfill dams is developed. It aims to take into consideration the differences of engineering properties of rockfill materials between in situ and laboratory conditions in the deformation analysis. The developed method is based on the modification of model parameters used in the chosen material model, which is, in this study, an elasto-plastic model with double yield surfaces, i.e., the modified Hardening Soil model. Datasets of experimental tests are collected from previous studies, and a new dataset of the Nam Ngum 2 dam project for investigating the scaling effects of rockfill materials, including particle size, particle gradation and density, is obtained. To quantitatively consider the influence of particle gradation, the coarse-to-fine content (C/F) concept is proposed in this study. The simple relations between the model parameters and particle size, C/F and density are formulated, which enable us to predict the mechanical properties of prototype materials from laboratory tests. Subsequently, a 3D finite element analysis of the Nam Ngum 2 concrete face slab rockfill dam at the end of the construction stage is carried out using two sets of model parameters (1) based on the laboratory tests and (2) in accordance with the proposed method. Comparisons of the computed results with dam monitoring data indicate that the proposed method can provide a simple but effective framework to take account of the scaling effect in dam deformation analysis.

Keywords

References

  1. Chen, J.F., Liu, J.X., Xue, J.F. and Shi, Z.M. (2014), "Stability analyses of a reinforced soil wall on soft soils using strength reduction method", Eng. Geol., 177, 83-92. https://doi.org/10.1016/j.enggeo.2014.05.018
  2. Cooke, J.B. (1984), "Progress in rock-fill dams, (18th Terzaghi Lecture)", J. Geotech. Eng., 110(10), 1381-1414. https://doi.org/10.1061/(ASCE)0733-9410(1984)110:10(1381)
  3. Desai, C.S. (1995), Constitutive Modeling Using the Disturbed State as Microstructure Self-Adjustment Concept, Continuum Models for Materials with Microstructure, Wiley, Chichester, U.K.
  4. Desai, C.S. (2001), Mechanics of Materials and Interfaces: The Disturbed State Concept, CRC Press, Boca Raton, Florida, U.S.A.
  5. Duncan, J.M. and Chang, C.Y. (1970), "Nonlinear analysis of stress-strain in soils", J. Soil Mech. Found. Div., 96(5), 1629-1653.
  6. Hamidi, A., Azini, E. and Masoudi, B. (2012), "Impact of gradation on the shear strength-dilation behavior of well graded sand-gravel mixtures", Sci. Iran., 19(3), 393-402. https://doi.org/10.1016/j.scient.2012.04.002
  7. Honkanadavar, N. and Sharma, K. (2014), "Testing and Modeling the Behavior of Riverbed and Blasted Quarried Rockfill Materials", J. Geomech., 14(6), 04014028. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000378
  8. Hosseinzadeh, S. and Joosse, J.F. (2015), "Design optimisation of retaining walls in narrow trenches using both analytical and numerical methods", Comput. Geotech., 68, 338-351.
  9. ICOLD (2004), Concrete Face Rockfill Dams: Concepts for Design and Construction 2004, International Commission on Large Dams, Paris, France.
  10. IWHR (2007), Report on Laboratory Tests of the Rockfill Materials of Nam Ngum 2 CFRD, Institute of Water Resources and Hydropower Research, Beijing, China.
  11. Jamsawang, P., Yoobanpot, N., Thanasisathit, N., Voottipruex, P. and Jongpradist, P. (2016), "Three-dimensional numerical analysis of a DCM column-supported highway embankment", Comput. Geotech., 72, 42-46. https://doi.org/10.1016/j.compgeo.2015.11.006
  12. Jia, Y. and Chi, S. (2015), "Back-analysis of soil parameters of the Malutang II concrete face rockfill dam using parallel mutation particle swarm optimization", Comput. Geotech., 65, 87-96. https://doi.org/10.1016/j.compgeo.2014.11.013
  13. Jongpradist, P., Kaewsri, T., Sawatparnich, A. Suwansawat, S., Youwai, S., Kongkitkul, W. and Sunitsakul, J. (2013), "Development of tunneling influence zones for adjacent pile foundations by numerical analyses", Tunnell. Undergr. Sp. Technol., 34, 96-109. https://doi.org/10.1016/j.tust.2012.11.005
  14. Kang, F., Jun, J.L. and Xu, Q. (2009), "Hybrid simplex artificial bee colony algorithm and its application in material dynamic parameter back analysis of concrete dams", Shuili Xuebao J. Hydraul. Eng., 40(6), 736-742.
  15. Kim, Y.S., Seo, M.W., Lee, C.W. and Kang, G.C. (2014), "Deformation characteristics during construction and after impoundment of the CFRD-type Daegok Dam, Korea", Eng. Geol., 178, 1-14. https://doi.org/10.1016/j.enggeo.2014.06.009
  16. Kokusho, T., Hara, T. and Hiraoka, R. (2004), "Undrained shear strength of granular soils with different particle gradations", J. Geotech. Geoenviron. Eng., 130(6), 621-629. https://doi.org/10.1061/(ASCE)1090-0241(2004)130:6(621)
  17. Li, S., Yu, S., Shangguan, Z. and Wang, Z. (2016), "Estimating model parameters of rockfill materials based on genetic algorithm and strain measurements", Geomech. Eng., 10(1), 37-48. https://doi.org/10.12989/gae.2016.10.1.037
  18. Liu, H. and Zou, D. (2013), "Associated generalized plasticity framework for modeling gravelly soils considering particle breakage", J. Eng. Mech., 139(5), 606-615. https://doi.org/10.1061/(ASCE)EM.1943-7889.0000513
  19. Lowe, J. (1964), "Shear strength of coarse embankment dam materials", Proceedings of the 8th International Congress on Large Dams, Edinburgh, Soctoland, May.
  20. Ma, G., Chang, X.L., Zhou, W. and Ng, T.T. (2014), "Mechanical response of rockfills in a simulated true triaxial test: A combined FDEM study", Geomech. Eng., 7(3), 317-333. https://doi.org/10.12989/gae.2014.7.3.317
  21. Marachi, N.D., Chan, C.K., Seed, H.B. and Duncan, J.M. (1969), Strength and Deformation Characteristics of Rockfill Materials, Rep. No. TE 69-5, Civil Engineering Deptartment, University of California, Berkeley, California, U.S.A.
  22. Marsal, R.J. (1967), "Large Scale Testing of Rockfill Materials", J. Soil Mech. Found. Div., 93(SM2), 27-43.
  23. Meng, F., Zhang, J.S., Chen, X.B. and Wang, Q.Y. (2014), "Deformation characteristics of coarse-grained soil with various gradations", J. Central South Univ., 21(6), 2469-2476. https://doi.org/10.1007/s11771-014-2201-3
  24. Mroz, Z. and Zienkiewicz, O.C. (1984), Uniform formulation of Constitutive Equations for Clay and Sand, in Mechanics of engineering materials, John Wiley and Sons, Chichester, England.
  25. NJHRI. (1999), "Specification of soil test (SL 237-1999)", Ministry of Water Resources of the People's Republic of China, China Water Resources and Hydropower Press, Beijing.
  26. Pramthawee, P., Jongpradist, P. and Kongkitkul, W. (2011), "Evaluation of hardening soil model on numerical simulation of behaviors of high rockfill dams", Songklanakarin J. Sci. Technol., 33(3), 325-334.
  27. Pramthawee, P., Jongpradist, P. and Sukkarak, R. (2017), "Integration of creep into a modified hardening soil model for time-dependent analysis of a high rockfill dam", Comput. Geotech., 91, 104-116. https://doi.org/10.1016/j.compgeo.2017.07.008
  28. Ramon, A., Romero, E.E. and Alonso, E.E. (2008), "Grain size effects on rockfill constitutive behaviour", Proceedings of the 1st European Conference on Unsaturated Soils, Durham, U.K., July.
  29. Rowe, P.W. (1962), "The stress-dilatancy relation for static equilibrium of an assembly of particles in contact", Proc. Royal Soc. A., 269, 500-527. https://doi.org/10.1098/rspa.1962.0193
  30. Sanchez-Leal, F. (2007), "Gradation Chart for Asphalt Mixes: Development", J. Mater. Civ. Eng., 19(2), 185-197. https://doi.org/10.1061/(ASCE)0899-1561(2007)19:2(185)
  31. Schanz, T., Vermeer, P.A. and Bonnier, P.G. (1999), The Hardening Soil Model-Formulation and Verification, in Beyond 2000 in Computational Geotechnics, Balkema, Amsterdam, Rotterdam, The Netherlands.
  32. Sukkarak, R., Pramthawee, P. and Jongpradist, P. (2017), "A Modified Elasto-plastic model with double yield surfaces and considering particle breakage for the settlement analysis of high rockfill dams", KSCE J. Civ. Eng., 21(3), 734-745. https://doi.org/10.1007/s12205-016-0867-9
  33. Tabibnejad, A., Heshmati, A., Salehzadeh, H. and Tabatabaei, S.H. (2014), "Effect of gradation curve and dry density on collapse deformation behavior of a rockfill material", KSCE J. Civ. Eng., 19(3), 631-640. https://doi.org/10.1007/s12205-013-0682-5
  34. Tunsakul, J., Jongpradist, P., Kongkitkul, W., Wonglert, A. and Youwai, S. (2013), "Investigation of failure behavior of continuous rock mass around cavern under high internal pressure", Tunnell. Undergr. Sp. Technol., 34, 110-123. https://doi.org/10.1016/j.tust.2012.11.004
  35. Varadarajan, A., Sharma, K., Venkatachalam, K. and Gupta, A. (2003), "Testing and modeling two rockfill materials", J. Geotech. Geoenviron., 129(3), 206-218. https://doi.org/10.1061/(ASCE)1090-0241(2003)129:3(206)
  36. Varadarajan, A., Sharma, K.G., Abbas, S.M. and Dhawan, A.K. (2006), "Constitutive model for rockfill materials and determination of material constants", J. Geomech., 6(4), 226-237. https://doi.org/10.1061/(ASCE)1532-3641(2006)6:4(226)
  37. Wang, Z., Liu, S., Vallejo, L. and Wand, L. (2014), "Numerical analysis of the causes of face slab cracks in Gongboxia rockfill dam", Eng. Geol., 181, 224-232. https://doi.org/10.1016/j.enggeo.2014.07.019
  38. Wei, K.M., Zhu, S.H. and Yu, X.H. (2014), "Influence of the scale effect on the mechanical parameters of coarse-grained soils", Iran. J. Sci. Technol. Trans. Civ. Eng., 38(C1), 75-84.
  39. Xiao, Y., Liu, H., Chen, Y. and Jiang, J. (2014), "Strength and deformation of rockfill material based on large-scale triaxial compression tests. I: Influences of density and pressure", J. Geotech. Geoenviron., 14(12), 04014070.
  40. Xu, B., Zou, J. and Liu, H. (2012b), "Three-dimensional simulation of the construction process of the Zipingpu concrete face rockfill dam based on a generalized plasticity model", Comput. Geotech., 43, 143-154. https://doi.org/10.1016/j.compgeo.2012.03.002
  41. Xu, M., Song, E. and Chen, J. (2012a), "A large triaxial investigation of the stress-path-dependent behavior of compacted rockfill", Acta. Geotech., 7(3), 167-175. https://doi.org/10.1007/s11440-012-0160-0
  42. Yu, S.Z., Jie, L.J. and Yu, W.H. (2007), "Inverse research for gravity dam parameters based on chaos artificial fish swarm algorithm", Yantu Lixue Rock Soil Mech., 28(10), 2193-2196.
  43. Zhang, G. and Zhang, J.M. (2008), "Unified modeling of monotonic and cyclic behavior of interface between structure and gravelly soil", Soil. Found., 48(2), 231-245. https://doi.org/10.3208/sandf.48.231
  44. Zhang, G., Zhang, J.M. and Yu, Y. (2007), "Modeling of Gravelly Soil with Multiple Lithologic Components and its Application", Soil. Found., 47(4), 799-810. https://doi.org/10.3208/sandf.47.799
  45. Zheng, D., Cheng, L., Bao, T. and Lv, B. (2013), "Integrated parameter inversion analysis method of a CFRD based on multioutput support vector machines and the clonal selection algorithm", Comput. Geotech., 47, 68-77. https://doi.org/10.1016/j.compgeo.2012.07.006
  46. Zhou, W., Hua, J., Chang, X. and Zhou, C. (2011), "Settlement analysis of the Shuibuya concrete-face rockfill dam", Comput. Geotech., 38(2), 269-280. https://doi.org/10.1016/j.compgeo.2010.10.004
  47. Zhou, W., Li, S.L.,Ma, G., Chang, X.L., Cheng, Y.G. and Ma, X. (2016), "Assessment of the crest cracks of the Pubugou rockfill dam based on parameters back analysis", Geomech. Eng., 11(4), 571-585. https://doi.org/10.12989/gae.2016.11.4.571