Discrete element modelling of geomechanical behaviour of methane hydrate soils with pore-filling hydrate distribution
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 Ele-ment method (DEM). A series of DEM simulations of triax-ial compression t...
| Main Authors: | , |
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| Format: | Text |
| Language: | English |
| Published: |
2010
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.653.5194 http://pmrl.ce.gatech.edu/papers/Brugada_2010a.pdf |
| Summary: | 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 Ele-ment method (DEM). A series of DEM simulations of triax-ial compression tests were performed to study the influence of methane hydrate saturation (Sh) on the stress–strain rela-tionship, the volumetric response and on the macroscopic geomechanical properties such as friction and dilation angle. Results of the numerical simulations are compared with labo-ratory 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. |
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