Granular Matter

, Volume 12, Issue 5, pp 517–525

Discrete element modelling of geomechanical behaviour of methane hydrate soils with pore-filling hydrate distribution

  • J. Brugada
  • Y. P. Cheng
  • K. Soga
  • J. C. Santamarina
Article

DOI: 10.1007/s10035-010-0210-y

Cite this article as:
Brugada, J., Cheng, Y.P., Soga, K. et al. Granular Matter (2010) 12: 517. doi:10.1007/s10035-010-0210-y

Abstract

Methane hydrate soil is a natural soil deposit that contains methane hydrate in its pores. The micro-scale processes of the geomechanical behaviour of methane hydrate-bearing soils are investigated by the Discrete Element method (DEM). A series of DEM simulations of triaxial compression tests were performed to study the influence of methane hydrate saturation (Sh) on the stress–strain relationship, the volumetric response and on the macroscopic geomechanical properties such as friction and dilation angle. Results of the numerical simulations are compared with laboratory triaxial test data performed on sandy methane hydrate samples. The simulations showed that for the pore-filling case, the hydrate contribution to the strength of the sediment is of a frictional nature, rather than of a cohesive nature.

Keywords

Discrete elementMethane hydratesPore-fillingTriaxial drained tests

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • J. Brugada
    • 1
  • Y. P. Cheng
    • 2
  • K. Soga
    • 1
  • J. C. Santamarina
    • 3
  1. 1.Department of EngineeringUniversity of CambridgeCambridgeUK
  2. 2.Department of Civil, Environmental and Geomatic EngineeringUniversity College LondonLondonUK
  3. 3.School of Civil and Environmental EngineeringGeorgia Institute of TechnologyAtlantaUSA