Strength and wear behaviors of methane hydrate-bearing silty sand: insights from multi-reversal direct shear tests
文献类型：期刊论文
| 作者 | Zhou, Jiazuo2; Dong, Yi3; Lu, Wanjun2; Ning, Fulong1; Li, Yanlong4; Wei, Changfu3 |
| 刊名 | ACTA GEOTECHNICA
 |
| 出版日期 | 2023-12-09 |
| 页码 | 17 |
| 关键词 | Long-distance slide Methane hydrate Multi-reversal direct shear test Strength and wear Shear plane |
| ISSN号 | 1861-1125 |
| DOI | 10.1007/s11440-023-02156-0 |
| 英文摘要 | Fractures and large shear deformation, aroused in gas hydrate reservoirs during gas production, may cause borehole collapse and submarine landslides. Currently, the behaviors of hydrate-bearing sediments undergoing long-distance shear displacement remain poorly understood. Here, a series of multi-reversal direct shear tests were performed on artificial samples of methane hydrate-bearing silty sand, aiming to reveal the strength and wear behaviors at the shear plane of hydrate reservoirs. Both peak and residual shear stress were extracted for hydrate-bearing samples. In addition to the primary fracture corresponding to the peak stress, the secondary fracture could occur due to the failure of asperities and depressions on the shear plane. Hydrate enhances strength mainly by increasing the apparent cohesion. The internal friction angle obtained from the peak strength of hydrate-bearing sediment is slightly higher than that derived from residual strength but closely approximates the internal friction angle obtained from hydrate-free strength. Dilatancy and wear are the two main factors controlling the internal friction angles of shear planes. As the shear distance increased, the hydrate-bearing sediment was worn with a stable reduction in volume. Normal stress aggravates wear and particle breakage for both hydrate-bearing and hydrate-free sediments. In contrast, hydrate has two opposed effects on wear: (1) Hydrate tends to increase roughness and thus enhance wear; and (2) hydrate cementation protects particles from wear. Under given normal stress, increasing hydrate saturation enhances strength and depresses wear significantly. |
| 资助项目 | National Natural Science Foundation of China[42171135] ; National Natural Science Foundation of China[51939011] ; National Natural Science Foundation of China[92058208] ; National Natural Science Foundation of China[42225207] ; CUG Scholar Scientific Research Funds at China University of Geosciences (Wuhan)[2022098] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001118715700004 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40044]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhou, Jiazuo; Wei, Changfu |
| 作者单位 | 1.China Univ Geosci, Fac Engn, Wuhan, Peoples R China 2.China Univ Geosci, Coll Marine Sci & Technol, Wuhan, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Peoples R China 4.Qingdao Inst Marine Geol, Key Lab Gas Hydrate, Minist Nat Resources, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Jiazuo,Dong, Yi,Lu, Wanjun,et al. Strength and wear behaviors of methane hydrate-bearing silty sand: insights from multi-reversal direct shear tests[J]. ACTA GEOTECHNICA,2023:17. |
| APA | Zhou, Jiazuo,Dong, Yi,Lu, Wanjun,Ning, Fulong,Li, Yanlong,&Wei, Changfu.(2023).Strength and wear behaviors of methane hydrate-bearing silty sand: insights from multi-reversal direct shear tests.ACTA GEOTECHNICA,17. |
| MLA | Zhou, Jiazuo,et al."Strength and wear behaviors of methane hydrate-bearing silty sand: insights from multi-reversal direct shear tests".ACTA GEOTECHNICA (2023):17. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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