Strength Estimation for Hydrate-Bearing Sediments From Direct Shear Tests of Hydrate-Bearing Sand and Silt
文献类型：期刊论文
| 作者 | Liu, Zhichao2,3; Dai, Sheng3; Ning, Fulong2,4; Peng, Li2; Wei, Houzhen1; Wei, Changfu1 |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 2018 |
| 卷号 | 45期号:2页码:715-723 |
| ISSN号 | 0094-8276 |
| DOI | 10.1002/2017GL076374 |
| 英文摘要 | Safe and economic methane gas production, as well as the replacement of methane while sequestering carbon in natural hydrate deposits, requires enhanced geomechanical understanding of the strength and volume responses of hydrate-bearing sediments during shear. This study employs a custom-made apparatus to investigate the mechanical and volumetric behaviors of carbon dioxide hydrate-bearing sediments subjected to direct shear. The results show that both peak and residual strengths increase with increased hydrate saturation and vertical stress. Hydrate contributes mainly the cohesion and dilatancy constraint to the peak strength of hydrate-bearing sediments. The postpeak strength reduction is more evident and brittle in specimens with higher hydrate saturation and under lower stress. Significant strength reduction after shear failure is expected in silty sediments with high hydrate saturation S-h >= 0.65. Hydrate contribution to the residual strength is mainly by increasing cohesion at low hydrate saturation and friction at high hydrate saturation. Stress state and hydrate saturation are dominating both the stiffness and the strength of hydrate-bearing sediments; thus, a wave velocity-based peak strength prediction model is proposed and validated, which allows for precise estimation of the shear strength of hydrate-bearing sediments through acoustic logging data. This method is advantageous to geomechanical simulators, particularly when the experimental strength data of natural samples are not available. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000425514300027 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/4201]  |
| 专题 | 岩土力学所知识全产出_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech 2.China Univ Geosci, Fac Engn ; 3.Georgia Inst Technol, Sch Civil & Environm Engn; 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources ; |
| 推荐引用方式 GB/T 7714 | Liu, Zhichao,Dai, Sheng,Ning, Fulong,et al. Strength Estimation for Hydrate-Bearing Sediments From Direct Shear Tests of Hydrate-Bearing Sand and Silt[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(2):715-723. |
| APA | Liu, Zhichao,Dai, Sheng,Ning, Fulong,Peng, Li,Wei, Houzhen,&Wei, Changfu.(2018).Strength Estimation for Hydrate-Bearing Sediments From Direct Shear Tests of Hydrate-Bearing Sand and Silt.GEOPHYSICAL RESEARCH LETTERS,45(2),715-723. |
| MLA | Liu, Zhichao,et al."Strength Estimation for Hydrate-Bearing Sediments From Direct Shear Tests of Hydrate-Bearing Sand and Silt".GEOPHYSICAL RESEARCH LETTERS 45.2(2018):715-723. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。