Microscopic analysis of deformation and water-salt transport in chlorine saline soils under unidirectional freezing in cold and arid zones
文献类型：期刊论文
| 作者 | Dong, Chenxi3,4; Chen, Xin; Mu, Yanhu2; Duan, Zhao3; Xue, Qiang4 ; Sun, Chuanbo1; Li, Jiangshan4
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| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2025-04-01 |
| 卷号 | 17期号:4页码:2445-2460 |
| 关键词 | Chlorine saline soils Microstructure Unidirectional freezing Water-salt transport Deformation |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2024.02.049 |
| 英文摘要 | Sudden temperature drops cause soils in natural environments to freeze unidirectionally, resulting in soil expansion and deformation that can lead to damage to engineering structures. The impact of temperature-induced freezing on deformation and solute migration in saline soils, especially under extended freezing, is not well understood due to the lack of knowledge regarding the microscopic mechanisms involved. This study investigated the expansion, deformation, and water-salt migration in chlorinated saline soils, materials commonly used for canal foundations in cold and arid regions, under different roof temperatures and soil compaction levels through unidirectional freezing experiments. The microscopic structures of saline soils were observed using scanning electron microscopy (SEM) and optical microscopy. A quantitative analysis of the microstructural data was conducted before and after freezing to elucidate the microscopic mechanisms of water-salt migration and deformation. The results indicate that soil swelling is enhanced by elevated roof temperatures approaching the soil's freezing point and soil compaction, which prolongs the duration and accelerates the rate of water-salt migration. The unidirectional freezing altered the microstructure of saline soils due to the continuous temperature gradients, leading to four distinct zones: natural frozen zone, peak frozen zone, gradual frozen zone, and unfrozen zone, each exhibiting significant changes in pore types and fractal dimensions. Vacuum suction at the colder end of the soil structure facilitates the upward migration of salt and water, which subsequently undergoes crystallization. This process expands the internal pore structure and causes swelling. The findings provide a theoretical basis for understanding the evolution of soil microstructure in cold and arid regions and for the management of saline soil engineering. (c) 2025 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/ 4.0/). |
| 资助项目 | Open Fund of State Key Laboratory of Frozen Soil Engineering[SKLFSE201806] ; National Natural Science Foundation of China[42177155] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001471700300001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35638]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Jiangshan |
| 作者单位 | 1.Liaoning Tech Univ, Sch Civil Engn, Fuxin 123000, Peoples R China 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China 3.Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710054, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong, Chenxi,Chen, Xin,Mu, Yanhu,et al. Microscopic analysis of deformation and water-salt transport in chlorine saline soils under unidirectional freezing in cold and arid zones[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2025,17(4):2445-2460. |
| APA | Dong, Chenxi.,Chen, Xin.,Mu, Yanhu.,Duan, Zhao.,Xue, Qiang.,...&Li, Jiangshan.(2025).Microscopic analysis of deformation and water-salt transport in chlorine saline soils under unidirectional freezing in cold and arid zones.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,17(4),2445-2460. |
| MLA | Dong, Chenxi,et al."Microscopic analysis of deformation and water-salt transport in chlorine saline soils under unidirectional freezing in cold and arid zones".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 17.4(2025):2445-2460. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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