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A chemo-elastic–plastic model for unsaturated expansive clays
Xiaoqin Lei; Henry Wong; Antonin Fabbri; Ali Limam; Y.M. Cheng
2016
Source PublicationInternational Journal of Solids and Structures
ISSN0020-7683
Pages354-378
AbstractClays are widely used as sealing materials in various geotechnical and geo-environmental engineering ap- plications. These clays are usually unsaturated and are sensitive to chemical composition of the saturat- ing solutions. During their service period, various mechanical, chemical, and hydraulic loading conditions, usually coupled with each other, can be encountered. It is necessary to use a chemo-elastic–plastic unsat- urated model to account for these coupled loading paths and simulate the possible behaviours of these clays in their realistic engineering context. In this paper, based on the thermodynamic framework (Lei et al., 2014) for unsaturated expansive clays, the chemo-elastic–plastic model developed by Loret et al. (2002) for saturated homoionic expansive clays is extended to the general unsaturated case. From a the- oretical analysis, it is shown that this model is sufficient to simulate the typical behaviours under various mechanical, chemical, and hydraulic loading conditions. The model is then validated against available ex- perimental data of oedometer tests concerning purely mechanical and mixed chemo-mechanical loadings under controlled matric suction on reconstituted Boom Clay mixed with NaNO 3 solution. Reasonably ac- curate estimates of quantitative responses of these complex coupled geochemical loading paths can be obtained, thus giving us a preliminary insight on chemo-hydro-mechanical coupled behaviours.
KeywordChemo-mechanical Coupling Elastic-plasticity Unsaturated Soil Expansive Clay Double Structure
DOI10.1016/j.ijsolstr.2016.01.008
Indexed BySCI
Language英语
Quartile3区
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/17687
Collection山地灾害与地表过程重点实验室
Recommended Citation
GB/T 7714
Xiaoqin Lei,Henry Wong,Antonin Fabbri,等. A chemo-elastic–plastic model for unsaturated expansive clays[J]. International Journal of Solids and Structures,2016:354-378.
APA Xiaoqin Lei,Henry Wong,Antonin Fabbri,Ali Limam,&Y.M. Cheng.(2016).A chemo-elastic–plastic model for unsaturated expansive clays.International Journal of Solids and Structures,354-378.
MLA Xiaoqin Lei,et al."A chemo-elastic–plastic model for unsaturated expansive clays".International Journal of Solids and Structures (2016):354-378.
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