Influence of pressure and density on the rheological properties of rockfills

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Abstract

Long-term deformations of rockfill dams can be related to the type of dam, the pre-compaction achieved during the construction of the dam, the history of loading events, the rheological properties of the rockfill material used, the seepage behavior caused by defects of the sealing, the interactions of the dam building with the foundation, and the hydrothermal phenomena of the stressed rockfill material. The present paper investigates the rheological properties of coarse grained rockfill materials using a hypoplastic constitutive model. Particular attention is paid to wetting deformation under different deviatoric loading states and pre-compactions. To quantify the state of weathering a so-called “solid hardness” is used in the sense of a continuum description. It is shown that an appropriate modeling of wetting deformations requires a unified description of the interaction at least between the state of weathering, the stress state, the density and the rate of deformation. The results obtained from the numerical simulations are compared with available experimental data for a rockfill material used in Xiaolangdi earth dam.

Keywords

rockfills solid hardness wetting deformation hypoplasticity creep 

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References

  1. 1.
    Brauns J, Kast K, Blinde A. Compaction effects on the mechanical and saturation behaviour of disintegrated rockfill. In: Proceedings of the International conference on Compaction. Paris, 1980, 1: 107–112Google Scholar
  2. 2.
    Kast K. Mechanisches Verhalten von Granitschuettungen. In Veroeffentlichungen des Institutes fuer Bodenmechanik und Felsmechanik der Universitaet Fridericiana in Karlsruhe, Heft 125, 1992Google Scholar
  3. 3.
    Biarez J, Hicher P Y. Influence de la granulometrie et de son evolution par ruptures de grains sur Ie comportement mecanique de materiaux granulaires. Revue française de genie civil, 1(4): 607–631, 1997Google Scholar
  4. 4.
    Nobari E S, Duncan J M. Movements in dams due to reservoir filling. In: Proceedings of the ASCE Specialty conference on Performance of Earth and Earth-supported Structure. Lafayette: Purdue University, 1973, 797–815Google Scholar
  5. 5.
    Alonso E, Oldecop L A. Fundamentals of rockfill collapse. In: Proceedings of the 1st Asian Conf. on Unsaturated Soils. Rahardjo H, Toll DG, Leong EC, eds. Rotterdam: Balkema Press, 2000, 3–13Google Scholar
  6. 6.
    Oldecop L A, Alonso E. Theoretical investigation of the time-dependent behaviour of rockfill. Geotechnique, 2007, 57(3): 289–301CrossRefGoogle Scholar
  7. 7.
    Hu W, Frossart E, Hicher P Y, et al. A new method to evaluate the mechanical behavior of granular material with large particles: Theory and validation: In: Proceedings of the 2nd Int. Conf. on Long Term Behaviour of Dams. Bauer, Semprich and Zenz, eds. Graz: Publisher Graz University of Technology, 2009, 437–478Google Scholar
  8. 8.
    Alonso E, Cardoso R. Behaviour of Materials for Earth and Rockfill Dams: Perspective from Unsaturated Soil Mechanics. In: Proceedings of the 2nd Int. Conf. on Long Term Behaviour of Dams. Bauer, Semprich and Zenz, eds. Graz: Publisher Graz University of Technology, 1–38, 2009Google Scholar
  9. 9.
    Klammer D, Dietzel M. Weathering of Natural Minerals and Rocks — Effect of Composition and Structure of Solids and Solution Chemistry. In: Proceedings of the 6th Int. Conf. on Dam Engineering. Pina, Portela and Gomes, eds. Lisbon, Portugal, 2011Google Scholar
  10. 10.
    Ham T G, Nakata Y, Orense R, et al. Influence of water on the compressive behavior of decomposed granite soil. Journal of Geotechnical and Geoenvironmental Engineering, 2010, 136(5): 697–705CrossRefGoogle Scholar
  11. 11.
    Bauer E. Hypoplastic modelling of moisture-sensitive weathered rockfill materials. Acta Geotechnica, 2009, 4(4): 261–272CrossRefGoogle Scholar
  12. 12.
    Li G X. Triaxial Wetting Experiments on Rockfill Materials Used in Xiaolangdi Earth Dam. Research Report from Tsinghua University, 1988Google Scholar
  13. 13.
    Bauer E, Fu Z, Liu S. Hypoplastic constitutive modeling of wetting deformation of weathered rockfill materials. Frontiers of Architecture and Civil Engineering in China, 2010, 4(1): 78–91CrossRefGoogle Scholar
  14. 14.
    Kolymbas D. An outline of hypoplasticity. Archive of Applied Mechanics, 1991, 61: 143–151MATHGoogle Scholar
  15. 15.
    Wu W, Bauer E. A hypoplastic model for barotropy and pyknotropy of granular soils. In: Proceedings of the International Workshop on Modern Approaches to Plasticity. Elsevier, 225–245, 1993Google Scholar
  16. 16.
    Gudehus G. A comprehensive constitutive equation for granular materials. Soil and Foundation, 1996, 36(1): 1–12CrossRefGoogle Scholar
  17. 17.
    Gudehus G. Physical Soil Mechanics, Advances in Geophysical and Environmental Mechanics and Mathematics. Springer-Verlag Berlin-Heidelberg, 2011Google Scholar
  18. 18.
    Bauer E. Calibration of a comprehensive hypoplastic model for granular materials. Soil and Foundation, 1996, 36(1): 13–26CrossRefGoogle Scholar
  19. 19.
    Bauer E. Constitutive modelling of critical states in hypoplasticity. In: Proceedings of the 5th International Symposium on Numerical Models in Geomechanics. Pande and Pietruszczak, Balkema Press, 15–20, 1995Google Scholar
  20. 20.
    Bauer E, Zhu Y. Constitutive modelling of pressure, density and moisture content on the mechanical behaviour of rockfill materials. In: Proc. of the 4th Int. Conf. On Dam Eng. Wieland, M. Rena Q. Tan J S Y, eds. Nanjing: Balkema Publishers, 2004, 129–146Google Scholar
  21. 21.
    Bauer E. Constitutive modelling of critical states in hypoplasticity. In: Proceedings of the Fifth International Symposium on Numerical Models in Geomechanics. NUMOG-V, Davos, Switzerland, Balkema, 15–20, 1995Google Scholar
  22. 22.
    Bauer E. The critical state concept in hypoplasticity. In: Proceeding of the 9th Int. Conf. on Computer Methods and Advances in Geomechanics. IACMAG 97, Wuhan, China, 1997, 691–696Google Scholar
  23. 23.
    Matsuoka H, Nakai T. Stress-strain relationship of soil based on the “SMP”. In: Proceedings of Specialty Session 9, IX Int. Conf. Soil Mech. Found. Eng. Tokyo, 1977, 153–162Google Scholar
  24. 24.
    Bauer E. Conditions for embedding Casagrande’s critical states into hypoplasticity. Mechanics of Cohesive-Frictional Materials, 2000, 5(2): 125–148CrossRefGoogle Scholar
  25. 25.
    Fu Z, Bauer E. Hypoplastic constitutive modeling of the long term behaviour and wetting deformation of weathered granular materials. In: Proceedings of the 2nd Int. Conf. On Long Term Behaviour of Dams, Bauer, Semprich and Zenz, eds. Graz: Publisher Graz University of Technology, 437–478, 2009Google Scholar
  26. 26.
    Fu Z Z. Hypoplastic constitutive modelling for wetting deformation of granular materials and its application in Engineering. Dissertation for the Doctoral Degree. Nanjing: Hohai University, 2011 (in Chinese)Google Scholar
  27. 27.
    Bauer E, Fu Z. Modeling of weathered and moisture sensitive granular materials. In: Proceedings of the 9th International Workshop on Bifurcation and Degradation in Geomaterials. Bonelli S, Dascalu C, Nicot F, eds. Springer Series in Geomechanics & Geoengineering, 2011, 333–338Google Scholar
  28. 28.
    Herle I, Gudehus G. Determination of parameters of a hypoplastic constitutive model from properties of grain assemblies. Mechanics of Cohesive-Frictional Materials, 1999, 4(5): 461–486CrossRefGoogle Scholar
  29. 29.
    Bauer E, Tantono S F, Niemunis A, et al. Modelling the Disintegration of Weathered and Partly Saturated Grains of Rockfill Material. In: Proceedings of the 3rd Asian Conference on Unsaturated Soils. Beijing: Science Press, 2007, 335–340Google Scholar

Copyright information

© Higher Education Press and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Institute of Applied MechanicsGraz University of TechnologyGrazAustria
  2. 2.Geotechnical Engineering DepartmentNanjing Hydraulic Research InstituteNanjingChina
  3. 3.Institute of Hydraulic StructuresHohai UniversityNanjingChina

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