A state-dependent hypoplastic model for methane hydrate-bearing sands

被引:27
作者
Liu, Jun [1 ]
Wang, Shun [3 ]
Jiang, Mingjing [1 ,2 ]
Wu, Wei [3 ]
机构
[1] Tianjin Univ, Dept Civil Engn, Tianjin 300072, Peoples R China
[2] Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai 200092, Peoples R China
[3] Univ Bodenkultur Wien, Inst Geotech, Feistmantelstr 4, A-1180 Vienna, Austria
基金
中国国家自然科学基金; 欧盟地平线“2020”;
关键词
Critical state; Hypoplastic constitutive model; Methane hydrate; Phase state; Sands; CONSTITUTIVE MODEL; DEM SIMULATION; PURE WATER; DISSOCIATION; BEHAVIOR; SEDIMENT; EQUILIBRIUM; STABILITY; EVOLUTION;
D O I
10.1007/s11440-020-01076-7
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
The mechanical behaviors of methane hydrate-bearing sands (MHBS) are largely affected by the presence of methane hydrate, temperature, and pore pressure. In this study, we present a simple hypoplastic model for MHBS. Methane hydrate saturation is included as a state parameter affecting the mechanical behaviors of MHBS. A new phase parameter is introduced to account for the coupled effects of temperature and pore pressure on the mechanical behaviors of MHBS. The phase parameter can be determined by a simple function of temperature and pore pressure. Comparison of the predictions with experiments shows that the model is able to capture the salient behaviors of MHBS.
引用
收藏
页码:77 / 91
页数:15
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