| Mechanism of soil stratum instability induced by hydrate dissociation |
| Zhang XH(张旭辉) ; Lu XB(鲁晓兵); Chen XD; Zhang LM; Shi YH; Zhang, XH (reprint author), Chinese Acad Sci, Inst Mech, Beijing, Peoples R China.
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| 发表期刊 | OCEAN ENGINEERING
 |
| 2016
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| 卷号 | 122页码:74-83 |
| ISSN | 0029-8018
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| 摘要 | Gas hydrate dissociation may lead to soil stratum instability such as marine landslides in hydrate-bearing sediments. In this paper, centrifugal tests were conducted to investigate the soil responses and stratum instability of a 14 degrees slope during hydrate dissociation under centrifugal accelerations of 50g and 100g, different boundary conditions and heating modes. New phenomena such as sliding of the over layer, layered fractures between the hydrate layer and the over layer, and fractures in the over layer were observed. The fluid pressures, horizontal displacements and vertical displacements of the soils were measured and compared under different conditions. The observed mechanisms and decoupled formulations considering heat transfer, fluid seepage, soil deformation and critical soil failure were presented and discussed. The formation of layered fractures during hydrate dissociation is regarded as an important factor leading to the instability of the slope. (C) 2016 Elsevier Ltd. All rights reserved. |
| 关键词 | Hydrate Dissociation
Centrifugal Test
Heat Transfer
Slope Stability
Fractures
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| DOI | 10.1016/j.oceaneng.2016.06.015
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| URL | 查看原文
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| 收录类别 | SCI
; EI
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| 语种 | 英语
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| WOS记录号 | WOS:000381530800008
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| 关键词[WOS] | Hydrate dissociation
; Centrifugal test
; Heat transfer
; Slope stability
; Fractures
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| WOS研究方向 | Engineering
; Oceanography
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| WOS类目 | Engineering, Marine
; Engineering, Civil
; Engineering, Ocean
; Oceanography
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| 项目资助者 | This study is funded by China Geological Survey (No. GZH201100311), National Natural Science Foundation of China (Nos. 51239010, 11102209), and CNPC-CAS cooperation project (No. 2015A-4813).
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| 课题组名称 | LMFS海洋土力学(LHO)
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| 论文分区 | 一类
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| 力学所作者排名 | True
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/59746
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| 专题 | 流固耦合系统力学重点实验室
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| 通讯作者 | Zhang, XH (reprint author), Chinese Acad Sci, Inst Mech, Beijing, Peoples R China. |
推荐引用方式
GB/T 7714 |
Zhang XH,Lu XB,Chen XD,et al. Mechanism of soil stratum instability induced by hydrate dissociation[J]. OCEAN ENGINEERING,2016,122:74-83.
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| APA |
张旭辉,鲁晓兵,Chen XD,Zhang LM,Shi YH,&Zhang, XH .(2016).Mechanism of soil stratum instability induced by hydrate dissociation.OCEAN ENGINEERING,122,74-83.
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| MLA |
张旭辉,et al."Mechanism of soil stratum instability induced by hydrate dissociation".OCEAN ENGINEERING 122(2016):74-83.
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