Shear strength degradation of gas hydrate-bearing sediment due to partial hydrate dissociation
文献类型：期刊论文
| 作者 | Zhou, Yuan1,3; Zhou, Jiazuo2; Chen, Pan1,3; Wei, Changfu1,3 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2024-07-01 |
| 卷号 | 16期号:7页码:2749-2763 |
| 关键词 | Hydrate-bearing soil Phase equilibrium condition Shear strength Unhydrated water content Mechanical behavior |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2023.10.002 |
| 英文摘要 | Extraction of methane hydrate from subseafloor reservoir may potentially trigger seabed slides and induce subsidence. To address the problems, it is crucial to properly characterize the phase equilibrium condition of pore hydrate and the shear strength of the soil. As one of the key constitutive components, the phase equilibrium condition enforces a constraint over pore gas pressure, temperature and unhydrated water content. Such a constraint, however, has been traditionally ignored in analyzing the mechanical behavior of hydrate-bearing soil. In this paper, a series of stepwise hydrate dissociation tests was performed, and the phase equilibrium condition of pore hydrate was determined, providing an effective way to evaluate the unhydrated water content during hydrate dissociation. Meanwhile, a series of direct shear tests was also conducted to explore the shear strength characteristics of the soil. It is shown that the shear strength of the hydrate-bearing soil can be significantly influenced by pore gas pressure, unhydrated water content, hydrate saturation and several other factors. In particular, the measured shear strength depends upon the initial water content of the sample, pointing to a potential problem that the shear strength could be wrongly determined if not properly interpreted. A shear strength criterion, which enforces the equilibrium condition of pore hydrate, is developed for hydrate-bearing soil, establishing a link between the equilibrium condition and the shear strength. The proposed equation describes well the shear strength characteristics of hydrate-bearing soils, remarkably unifying the effects of pore pressure, temperature, water content and hydrate saturation. (c) 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/). |
| 资助项目 | National Science Foundation of China (NSFC)[51939011] ; National Science Foundation of China (NSFC)[42171135] ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS)[2020326] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001268487300001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41951]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Wei, Changfu |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.China Univ Geosci, Wuhan 430074, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Yuan,Zhou, Jiazuo,Chen, Pan,et al. Shear strength degradation of gas hydrate-bearing sediment due to partial hydrate dissociation[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2024,16(7):2749-2763. |
| APA | Zhou, Yuan,Zhou, Jiazuo,Chen, Pan,&Wei, Changfu.(2024).Shear strength degradation of gas hydrate-bearing sediment due to partial hydrate dissociation.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(7),2749-2763. |
| MLA | Zhou, Yuan,et al."Shear strength degradation of gas hydrate-bearing sediment due to partial hydrate dissociation".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.7(2024):2749-2763. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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