Chemo-mechanical coupling constitutive model for chalk considering chalk-fluid physicochemical interaction
文献类型：期刊论文
| 作者 | Ma, T.1; Wei, C.1,2; Chen, P.1; Li, W.1 |
| 刊名 | GEOTECHNIQUE
 |
| 出版日期 | 2019-04-01 |
| 卷号 | 69期号:4页码:308-319 |
| 关键词 | chalk chemical properties constitutive relations partial saturation |
| ISSN号 | 0016-8505 |
| DOI | 10.1680/jgeot.17.P.115 |
| 英文摘要 | Chalk shows a pronounced water-weakening effect, which can be attributed to the microscopic physicochemical interactions between the pore fluid and the chalk matrix. In this paper a conceptual elastoplastic model is developed for describing the chemo-mechanical behaviour of chalk based on the framework of the modified Cam Clay model. Central to the model is the concept of intergranular stresses, introduced as the substitute for Terzaghi's effective stress to describe the chalk behaviour. In this context, the microscopic physicochemical interactions are characterised by introducing a macroscopic surface force potential. The composition and significance of pore water pressure are analysed, and the intergranular stress tensor is explicitly defined. To address the hardening effect of the microscopic physicochemical interactions, the preconsolidation pressure function is modified by introducing the intrinsic intergranular pressure as an additional hardening variable that accounts solely for the chalk-fluid interaction. It is shown that the proposed concept of intergranular stresses can address the effects of osmosis, adsorption and capillarity on the chalk behaviour in a consistent and systematic way. Comparisons between the theoretical simulations and experimental results demonstrate that the proposed model is capable of capturing the main features of the chemo-mechanical behaviour of chalk saturated with an individual or two (miscible or immiscible) fluids. |
| 资助项目 | Natural Science Foundation of China (NSFC)[11502276] ; Natural Science Foundation of China (NSFC)[41572293] ; Natural Science Foundation of China (NSFC)[51639008] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000461470000003 |
| 出版者 | ICE PUBLISHING |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/7484]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Ma, T. |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Hubei, Peoples R China 2.Guilin Univ Technol, Coll Civil & Architectural Engn, Guilin, Guangxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, T.,Wei, C.,Chen, P.,et al. Chemo-mechanical coupling constitutive model for chalk considering chalk-fluid physicochemical interaction[J]. GEOTECHNIQUE,2019,69(4):308-319. |
| APA | Ma, T.,Wei, C.,Chen, P.,&Li, W..(2019).Chemo-mechanical coupling constitutive model for chalk considering chalk-fluid physicochemical interaction.GEOTECHNIQUE,69(4),308-319. |
| MLA | Ma, T.,et al."Chemo-mechanical coupling constitutive model for chalk considering chalk-fluid physicochemical interaction".GEOTECHNIQUE 69.4(2019):308-319. |
入库方式： OAI收割
来源：武汉植物园
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