Swelling behaviors of heterogeneous red-bed mudstone subjected to different vertical stresses
文献类型：期刊论文
| 作者 | Huang, Kang1,2; Dai, Zhangjun1; Yan, Chengzeng3,4; Yu, Fei1; Zhang, Wei1,2; Chen, Shanxiong1 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2024-05-01 |
| 卷号 | 16期号:5页码:1847-1863 |
| 关键词 | Heterogeneous red-bed mudstone Self-sealing band Matric swelling and crack expansion FDEM Microcracks Energy evolution |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2023.08.004 |
| 英文摘要 | In this study, the axial swelling strain of red-bed mudstone under different vertical stresses are measured by swell-under-load method, and the microstructure of mudstone after hygroscopic swelling is studied by mercury intrusion porosimetry (MIP). The weakening coefficient and Weibull distribution function are introduced into the coupling model of mudstone moisture diffusion-swelling deformation-fracture based on finite-discrete element method (FDEM). The weakening effect of moisture on mudstone's mechanical parameters, as well as the heterogeneity of swelling deformation and stress distribution, is considered. The microcrack behavior and energy evolution of mudstone during hygroscopic swelling deformation under different vertical stresses are studied. The results show that the axial swelling strain of mudstone decreases with increase of the vertical stress. At low vertical stresses, moisture absorption in mudstone leads to formation of cracks caused by hydration-induced expansion. Under high vertical stresses, a muddy sealing zone forms on the mudstone surface, preventing further water infiltration. The simulation results of mudstone swelling deformation also demonstrate that it involves both swelling of the mudstone matrix and swelling caused by crack expansion. Notably, crack expansion plays a dominant role in mudstone swelling. With increasing vertical stress, the cracks in mudstone change from tensile cracks to shear cracks, resulting in a significant reduction in the total number of cracks. While the evolution of mudstone kinetic energy shows similarities under different vertical stresses, the evolution of strain energy varies significantly due to the presence of different types of cracks in the mudstone. The findings provide a theoretical basis for understanding the hygroscopic swelling deformation mechanism of red-bed mudstone at various depths. (c) 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting 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 | National Natural Science Foundation of China[42172308] ; Youth Innovation Promotion Association CAS[2022331] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001290936900001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42178]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Dai, Zhangjun |
| 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.China Univ Geosci, Fac Engn, Wuhan, Peoples R China 4.China Univ Geosci, Int Joint Res Ctr Deep Earth Drilling & Resource D, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Kang,Dai, Zhangjun,Yan, Chengzeng,et al. Swelling behaviors of heterogeneous red-bed mudstone subjected to different vertical stresses[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2024,16(5):1847-1863. |
| APA | Huang, Kang,Dai, Zhangjun,Yan, Chengzeng,Yu, Fei,Zhang, Wei,&Chen, Shanxiong.(2024).Swelling behaviors of heterogeneous red-bed mudstone subjected to different vertical stresses.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(5),1847-1863. |
| MLA | Huang, Kang,et al."Swelling behaviors of heterogeneous red-bed mudstone subjected to different vertical stresses".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.5(2024):1847-1863. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。