Experimental Study on Small-Strain Shear Modulus of Unsaturated Silty-Fine Sand
文献类型：期刊论文
| 作者 | Yan, Kai; Wang, Yong; Yang, Zhiyong; Lai, Xianghua; Chen, Cheng |
| 刊名 | APPLIED SCIENCES-BASEL
 |
| 出版日期 | 2022-09-01 |
| 卷号 | 12期号:17 |
| 关键词 | unsaturated soil sand resonance column bending element small strain shear modulus |
| 英文摘要 | The small-strain stiffness of soil is significant in the accurate prediction of the deformation caused by interactions between foundation soil and structures. Considering the whole range of small strain (10(-6)similar to 10(-3)), a bending element-resonant column (BE-RC) combined test system was developed to conduct continuous tests on the shear modulus of unsaturated soil. Under the dehydration path, it was used to investigate the small-strain shear modulus of unsaturated silty-fine sand in Hangzhou Bay, China. The results show that the shear modulus under different net stresses and matrix suctions appeared to non-linearly decay with the increase in strain until stable values were reached at a large strain. At the beginning from the saturated state, the G(max), value increased slowly with decreasing saturation and reached its maximum value at the optimum saturation (S-r)(opt); then, it rapidly decayed to the level in the saturated, once the saturation degree decreased to a level lower than (S-r)(opt). Additionally, an improved prediction model was proposed for the G(max) of unsaturated sand, considering different saturations. Based on the mesoscopic evolution of internal pore water morphology and the variation in intergranular stress caused by capillary action, the variation in the G(max), could be divided into three segments of saturation: the boundary effect stage, the transition stage and the unsaturated residual stage. |
| 学科主题 | Chemistry ; Engineering ; Materials Science ; Physics |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:000850961900001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34862]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS |
| 推荐引用方式 GB/T 7714 | Yan, Kai,Wang, Yong,Yang, Zhiyong,et al. Experimental Study on Small-Strain Shear Modulus of Unsaturated Silty-Fine Sand[J]. APPLIED SCIENCES-BASEL,2022,12(17). |
| APA | Yan, Kai,Wang, Yong,Yang, Zhiyong,Lai, Xianghua,&Chen, Cheng.(2022).Experimental Study on Small-Strain Shear Modulus of Unsaturated Silty-Fine Sand.APPLIED SCIENCES-BASEL,12(17). |
| MLA | Yan, Kai,et al."Experimental Study on Small-Strain Shear Modulus of Unsaturated Silty-Fine Sand".APPLIED SCIENCES-BASEL 12.17(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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