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Modeling the Mechanical Behavior of Gas Hydrate Bearing Sediments Based on Unified Hardening Framework

  • Kai Li
  • Rui-ming Liu
  • Liang KongEmail author
  • Xin-bo Zhao
Original Paper
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Abstract

Gas Hydrate Bearing Sediments (GHBS) are natural soil deposits that contain methane hydrate inside their pores and they have been considered as a potential energy resource. Deformation behavior and change in shear strength of sediments are not clearly understood on the occasion of methane hydrate production and its modeling poses great challenges. In this study, a new GHBS model based on unified hardening framework has been proposed with less and easily determined model parameters. This analytical model incorporates modified Cam-clay yield surface, plus the effect of hydrate saturation parameters to capture the mechanical behavior of GHBS. Comparisons of tri-axial compression tests with model simulations have been conducted to show the proposed model is able to predict the mechanical behavior of GHBS at different hydrate saturations and confinement conditions.

Keywords

Constitutive modeling Gas hydrate bearing sediments Unified hardening concept Shear strength Hydrate saturations 

Notes

Acknowledgements

This work is financially supported by the project of National Natural Science Foundation of China (Grant No. 11572165) and the project of Natural Science Foundation of Shandong Province (Grant No. ZR2016AB18).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interest.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Kai Li
    • 1
    • 2
  • Rui-ming Liu
    • 1
    • 2
  • Liang Kong
    • 1
    • 2
    Email author
  • Xin-bo Zhao
    • 1
    • 2
  1. 1.Department of ScienceQingdao University of TechnologyQingdaoChina
  2. 2.Qingdao Key Laboratory for Geomechanics and Offshore Underground EngineeringQingdaoChina

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