Large-Scale Triaxial Test on Mechanical Behavior of Coral Sand Gravel Layered Samples
文献类型：期刊论文
| 作者 | Tang, Xinyue1,2; Xin, Dongfeng3; Lei, Xuewen2; Yao, Ting1; Meng, Qingshan1; Liu, Qingbing4 |
| 刊名 | JOURNAL OF MARINE SCIENCE AND ENGINEERING
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 12期号:10页码:19 |
| 关键词 | coral sand and gravel layered soil large-scale triaxial test step loading failure mode |
| DOI | 10.3390/jmse12101784 |
| 英文摘要 | Layered structures comprising coral sand and gravel have been observed in hydraulic filled foundations in the coral reefs in the South China Sea, leading to anisotropy in their physical and mechanical properties. However, the effect of a layered structure on the strength and deformation of the coral soil foundation remains unclear. In this study, a series of large-scale triaxial compression tests and step-loading tests were carried out on four types of samples, i.e., clean coral sand, clean coral gravel, sand-over-gravel layered sample, and gravel-over-sand layered sample, to investigate the impact of confining pressure and the layered structure on the strength and failure modes of these soils. The results indicate that the stress-strain relationships of all samples predominantly exhibit strain hardening under drained conditions. Under identical confining pressures, the peak strength of clean coral sand is the lowest, while that of coral gravel is the highest. The peak strengths of the two layered samples fall between these extremes, with the gravel-over-sand layered sample exhibiting higher strength. All four samples have similar peak friction angles, slightly exceeding 40 degrees. The difference in peak strength among the four types of samples is attributed to the variations in cohesion, with the cohesion of clean coral gravel being up to four times that of clean sand, and the cohesion of layered samples falling between these two. Both clean sand and clean gravel samples exhibit a bulging phenomenon in the middle, while the layered samples primarily exhibit bulging near the coral gravel layer. In the step-loading tests, the bearing capacity of the layered samples falls between those of clean coral sand and coral gravel, with the gravel-over-sand layered samples demonstrating higher strength. Moreover, the p-s curve of the gravel-over-sand layered samples obtained from the large-scale triaxial apparatus under a confining pressure of 400 kPa resembles that from the plate load tests on the same samples. |
| 资助项目 | National Natural Science Foundation of China ; Natural Science Foundation of Hubei Province[2022CFB422] ; [41877267] ; [42177154] ; [42377192] |
| WOS研究方向 | Engineering ; Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:001343055000001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42954]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Yao, Ting |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Wuhan Univ Sci & Technol, Sch Urban Construct, Wuhan 430065, Peoples R China 3.Huajin Aramco Petrochem Co Ltd, Panjin 124205, Peoples R China 4.China Univ Geosci Wuhan, Badong Natl Observat & Res Stn Geohazards, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, Xinyue,Xin, Dongfeng,Lei, Xuewen,et al. Large-Scale Triaxial Test on Mechanical Behavior of Coral Sand Gravel Layered Samples[J]. JOURNAL OF MARINE SCIENCE AND ENGINEERING,2024,12(10):19. |
| APA | Tang, Xinyue,Xin, Dongfeng,Lei, Xuewen,Yao, Ting,Meng, Qingshan,&Liu, Qingbing.(2024).Large-Scale Triaxial Test on Mechanical Behavior of Coral Sand Gravel Layered Samples.JOURNAL OF MARINE SCIENCE AND ENGINEERING,12(10),19. |
| MLA | Tang, Xinyue,et al."Large-Scale Triaxial Test on Mechanical Behavior of Coral Sand Gravel Layered Samples".JOURNAL OF MARINE SCIENCE AND ENGINEERING 12.10(2024):19. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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