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Modelling of Bentonite for Nuclear Waste Disposal Facilities with Hypoplasticity

  • David MašínEmail author
Conference paper
Part of the Springer Series in Geomechanics and Geoengineering book series (SSGG)

Abstract

Summary of a coupled thermo-hydro-mechanical model based on hypoplasticity principles combined with the concept of double structure, aimed to predict bentonite behaviour in the simulations of planned nuclear waste repositories, is presented in this paper. The model has been developed by Mašín [11] by a hierarchical enhancement of the earlier model from [9], which did not consider the effects of temperature. That model, in turn, was a double structure enhancement of earlier models for unsaturated and saturated soils. Predictive performance of the model is presented by comparing model predictions with experiments.

Keywords

Bentonite Clay Hypoplasticity Waste disposal 

Notes

Acknowledgement

This project receives funding from the Euratom research and training programme 2014–2018 under grant agreement No. 745942. Institutional support by Center for Geosphere Dynamics (UNCE/SCI/006) is greatly appreciated.

References

  1. 1.
    Alonso, E.E., Vaunat, J., Gens, A.: Modelling the mechanical behaviour of expansive clays. Eng. Geol. 54, 173–183 (1999)CrossRefGoogle Scholar
  2. 2.
    Brooks, R., Corey, A.: Hydraulic properties of porous media. Hydrology paper no. Colorado State University (1964)Google Scholar
  3. 3.
    Gens, A., Alonso, E.: A framework for the behaviour of unsaturated expansive clays. Can. Geotech. J. 29, 1013–1032 (1992)CrossRefGoogle Scholar
  4. 4.
    Gudehus, G.: A comprehensive constitutive equation for granular materials. Soils Found. 36(1), 1–12 (1996)CrossRefGoogle Scholar
  5. 5.
    Hausmannová, L.: The influence of water pressure on the hydraulic conductivity and swelling pressure of Czech bentonites. Ph.D. thesis, Faculty of Civil Engineering, Czech Technical University (2017)Google Scholar
  6. 6.
    Mašín, D.: A hypoplastic constitutive model for clays. Int. J. Numer. Anal. Meth. Geomech. 29(4), 311–336 (2005)CrossRefGoogle Scholar
  7. 7.
    Mašín, D.: Predicting the dependency of a degree of saturation on void ratio and suction using effective stress principle for unsaturated soils. Int. J. Numer. Anal. Meth. Geomech. 34, 73–90 (2010)zbMATHGoogle Scholar
  8. 8.
    Mašín, D.: Hypoplastic Cam-clay model. Géotechnique 62(6), 549–553 (2012)CrossRefGoogle Scholar
  9. 9.
    Mašín, D.: Double structure hydromechanical coupling formalism and a model for unsaturated expansive clays. Eng. Geol. 165, 73–88 (2013)CrossRefGoogle Scholar
  10. 10.
    Mašín, D.: Clay hypoplasticity model including stiffness anisotropy. Géotechnique 64(3), 232–238 (2014)CrossRefGoogle Scholar
  11. 11.
    Mašín, D.: Coupled thermohydromechanical double structure model for expansive soils. ASCE J. Eng. Mech. 143(9), 04017067 (2017)CrossRefGoogle Scholar
  12. 12.
    Mašín, D., Khalili, N.: A hypoplastic model for mechanical response of unsaturatedsoils. Int. J. Numer. Anal. Meth. Geomech. 32(15), 1903–1926 (2008)CrossRefGoogle Scholar
  13. 13.
    Mašín, D., Khalili, N.: Swelling phenomena and effective stress in compacted expansive clays. Can. Geotech. J. 53(1), 134–147 (2016)CrossRefGoogle Scholar
  14. 14.
    Romero, E., Gens, A., Lloret, A.: Water permeability, water retention and microstructure of unsaturated compacted Boom clay. Eng. Geol. 54, 117–127 (1999)CrossRefGoogle Scholar
  15. 15.
    Tang, A.M., Cui, Y.J., Barnel, N.: Thermo-mechanical behaviour of a compacted swelling clay. Géotechnique 58(1), 45–54 (2008)CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Charles UniversityPragueCzech Republic

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