The infiltration characteristics of expansive soil subjected to drying-wetting cycles under surcharge
文献类型：期刊论文
| 作者 | Gao, Zhiao1,2; Kong, Lingwei1,2; Wang, Shuangjiao2,3; Wang, Gang1,2; Yan, Junbiao1,2 |
| 刊名 | CANADIAN GEOTECHNICAL JOURNAL
 |
| 出版日期 | 2024-10-15 |
| 页码 | 16 |
| 关键词 | drying-wetting cycle infiltration rate load expansive soil swelling and shrinkage deformation |
| ISSN号 | 0008-3674 |
| DOI | 10.1139/cgj-2023-0223 |
| 英文摘要 | This study investigates the infiltration characteristics of expansive soil subjected to drying-wetting cycles under surcharge. Infiltration tests are conducted on undisturbed expansive soil over four drying-wetting cycles. Additionally, the permeability coefficient under loading is determined prior to any drying-wetting cycles. Within the context of this study, the sample heights after drying and after wetting are monitored to determine the natural swelling and shrinkage deformations. Experimental results show that the infiltration rate decreases as the pressure increases. The sample's swelling-shrinkage deformation decreases with each progressive drying-wetting cycle, whereas the infiltration rate consistently increases. The infiltration curve under the drying-wetting cycle can be divided into three stages according to the infiltration characteristics, which is significantly different from the infiltration curve of the sample without the drying-wetting cycle. Moreover, the proposed model can fit the infiltration curves well, and its fitting parameters are described using dimensionless pressure and the number of drying-wetting cycles. The drying of the expansive soil produces cracks that are advantageous for infiltration. Additionally, the microscopic connection between aggregates reflects changes in the internal structure of the soil during successive drying-wetting cycles. As the number of drying-wetting cycle increases, small particles aggregate into large aggregates, and the contact relationship between the aggregate changes from face-face to point-point contact, reducing the swelling potential and increasing the porosity and infiltration capacity of the soil. |
| 资助项目 | National Key Research and Development Program of China[2019YFC1509901] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001334221300001 |
| 出版者 | CANADIAN SCIENCE PUBLISHING |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42801]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Kong, Lingwei |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Shale Gas & Geoengn, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Zhiao,Kong, Lingwei,Wang, Shuangjiao,et al. The infiltration characteristics of expansive soil subjected to drying-wetting cycles under surcharge[J]. CANADIAN GEOTECHNICAL JOURNAL,2024:16. |
| APA | Gao, Zhiao,Kong, Lingwei,Wang, Shuangjiao,Wang, Gang,&Yan, Junbiao.(2024).The infiltration characteristics of expansive soil subjected to drying-wetting cycles under surcharge.CANADIAN GEOTECHNICAL JOURNAL,16. |
| MLA | Gao, Zhiao,et al."The infiltration characteristics of expansive soil subjected to drying-wetting cycles under surcharge".CANADIAN GEOTECHNICAL JOURNAL (2024):16. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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