Influence of freeze-thaw cycles on mechanical properties of moraine soils
文献类型：期刊论文
| 作者 | Qiu, Enxi1,3,4; He, Qiaoling1; Chen, Qiuling1; Sun, Xiwang2; Zhang, Rui2; Qu, Mengfei1; Wan, Xusheng1 |
| 刊名 | TRANSPORTATION GEOTECHNICS
 |
| 出版日期 | 2023-09-01 |
| 卷号 | 42页码:14 |
| 关键词 | Freeze-thaw cycle Acoustic emission Failure mode UCS Elastic modulus |
| ISSN号 | 2214-3912 |
| DOI | 10.1016/j.trgeo.2023.101097 |
| 英文摘要 | The changes of mechanical properties of the soil caused by freeze-thaw cycles pose significant threats to the transportation systems that pass through the distribution area of moraine deposits. In order to study the mechanical mechanism and deformation characteristics of moraine soils, this study carried out a series of uniaxial compression tests, and the effects of different freeze-thaw cycles (0, 1, 3, 6 and 10), rock content (19.8 %, 41.9 %, 53.9 %) as well as water content (6 %, 9 %, 12 %, 15 %, 18 %) were considered. Besides, acoustic emission (AE) was utilized here to analyze the samples deformation response after the freeze-thaw cycle. Research results indicate that the stress-strain curves of the moraine soils exhibited four deformation stages. The AE counts of the samples were closely related to the rock content. After the freeze-thaw cycle, the AE signals of the samples with low rock content were more active in the compression stage and the linear elastic stage. However, there is no significant change in the AE counts of the samples with high rock content. Based on the fracture morphology, the failure modes of moraine soil could be divided into four types: oblique shear failure, splitting failure, bifurcation failure and bulging failure. After undergoing freeze-thaw cycles, the mechanical strength of the moraine soils is continuously reduced, and the reduction is fastest under the optimal water content for the uniaxial compressive strength (UCS). In addition, by orthogonal analysis, it was found that the most critical factors affecting the elastic modulus and UCS were water content and rock content, respectively. Studying the mechanical properties and failure mechanisms of moraine soils with different rock and water content after freeze-thaw cycles can guide the protection measures design for moraine soil slopes under different conditions. |
| 资助项目 | Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[SKLGME021014] ; National Natural Science Foundation of China[2020YJ0416] ; research on the disaster causing mechanism of high-level glacial ice-rock detrital accumulation bodies in Southeast Tibet ; research on expansive micromechanical behavior of red mudstone foundations of high-speed railways ; [42071087] ; [SKLGP2021K017] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001097428000001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39866]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Qu, Mengfei |
| 作者单位 | 1.Southwest Petr Univ, Sch Civil Engn & Geomatics, Chengdu 610500, Sichuan, Peoples R China 2.China Railway Eryuan Engn Grp Co Ltd, Chengdu 610031, Sichuan, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.State Key Lab Geohazard Prevent & Geoenvironm nt P, Chengdu 610059, Sichuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qiu, Enxi,He, Qiaoling,Chen, Qiuling,et al. Influence of freeze-thaw cycles on mechanical properties of moraine soils[J]. TRANSPORTATION GEOTECHNICS,2023,42:14. |
| APA | Qiu, Enxi.,He, Qiaoling.,Chen, Qiuling.,Sun, Xiwang.,Zhang, Rui.,...&Wan, Xusheng.(2023).Influence of freeze-thaw cycles on mechanical properties of moraine soils.TRANSPORTATION GEOTECHNICS,42,14. |
| MLA | Qiu, Enxi,et al."Influence of freeze-thaw cycles on mechanical properties of moraine soils".TRANSPORTATION GEOTECHNICS 42(2023):14. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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