Effect of Saturation on Shear Behavior and Particle Breakage of Coral Sand
文献类型：期刊论文
| 作者 | Chen, Xiang3; Shen, Jianhua3; Wang, Xing1,4; Yao, Ting3; Xu, Dongsheng2 |
| 刊名 | JOURNAL OF MARINE SCIENCE AND ENGINEERING
 |
| 出版日期 | 2022-09-01 |
| 卷号 | 10期号:9页码:- |
| 关键词 | coral sand saturation effective confining pressure shear behavior particle breakage |
| 英文摘要 | Coral sand is the main filling material for the island-reef foundation. Under tidal actions, the saturation (Sr) of coral sand layers varies with the specific depths in the reclaimed foundation. Studying the Sr effect of coral sand's mechanical behaviors is crucial for the stability of the reclaimed foundation of island-reefs. In this study, a quantitative injection method was designed to prepare coral sand with saturation ranging from 90% to 100%, and unconsolidated-undrained (UU) triaxial shear tests were conducted on coral sand under different effective confining pressures (sigma(3)'). The results indicated that the stress-strain curves of coral sand under various conditions were of the strain-softening type. When sigma(3)' = 200, 400, 600, and 800 kPa, the shear strength of coral sand decreased exponentially by 13.1, 9.1, 16.8, and 15.2%, respectively, with the increase in Sr from 90% to 100%. As Sr rose, the internal friction angle (phi) dropped by 3.77 degrees. The cohesion (c) was not significantly affected by Sr compared to phi. In consideration of the physical susceptibility of coral sand to breakage, relative breakage ratio (B-r) and modified relative breakage index (B-r*) were introduced to evaluate the particle breakage behaviors of coral sand samples with different Sr levels in the triaxial shear process. It was found that B-r and B-r* increase linearly with increasing Sr; the effect of Sr on the particle breakage of coral sand weakens significantly when sigma(3)' is sufficiently large. The median particle size (d(50)) of coral sand decreases with increasing Sr, and presents a negative linear correlation with both B-r and B-r*. Based on comparing the strength and particle breakage characteristics of coral sand samples with varying Sr levels, this study suggests that 92.5% should be considered as the Sr value of coral sand available for testing. |
| 学科主题 | Engineering ; Oceanography |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:000858600100001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35117]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.School of Civil Engineering, Guangzhou University, Guangzhou 510006, China 2.School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430062, China 3.State Key Laboratory of Geotechnical Mechanics and Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 4.Earthquake Engineering Research & Test Center, Guangzhou University, Guangzhou 510405, China |
| 推荐引用方式 GB/T 7714 | Chen, Xiang,Shen, Jianhua,Wang, Xing,et al. Effect of Saturation on Shear Behavior and Particle Breakage of Coral Sand[J]. JOURNAL OF MARINE SCIENCE AND ENGINEERING,2022,10(9):-. |
| APA | Chen, Xiang,Shen, Jianhua,Wang, Xing,Yao, Ting,&Xu, Dongsheng.(2022).Effect of Saturation on Shear Behavior and Particle Breakage of Coral Sand.JOURNAL OF MARINE SCIENCE AND ENGINEERING,10(9),-. |
| MLA | Chen, Xiang,et al."Effect of Saturation on Shear Behavior and Particle Breakage of Coral Sand".JOURNAL OF MARINE SCIENCE AND ENGINEERING 10.9(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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