Experimental study on mechanical behavior deterioration of undisturbed loess considering freeze-thaw action | |
Yang, Shuangshuang; Chou, Yaling![]() ![]() | |
2024 | |
发表期刊 | SOILS AND ROCKS
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ISSN | 1980-9743 |
卷号 | 47期号:1 |
摘要 | To solve the problem that the mechanical behavior of undisturbed loess in seasonally frozen soil area is affected by freeze-thaw action, triaxial shear tests of undisturbed loess under freeze-thaw condition were carried out. The results show that the mechanical properties of undisturbed loess are greatly affected by factors including freeze-thaw process, water content, natural density and confining pressure. Freeze-thaw action has a certain impact on the failure surface shape and stress-strain curve. Before and after freeze-thaw, the shape of the shear failure surface is complex, including single oblique failure surface, double oblique failure surface, vertical failure surface, X-shaped failure surface, bulging failure, etc. And under the conditions of low water content, low confining pressure and high dry density, the stress-strain curve tends to be softened. Conversely, the curve tends to harden. Freeze-thaw action can make the stress-strain curve transition from softening to hardening. In addition, the freeze-thaw action significantly weakens the failure strength, shear strength, cohesion, initial tangent modulus and failure ratio of undisturbed soil, but does not change the internal friction angle obviously. Also, the heterogeneity of natural soil is also an important factor affecting the mechanical parameters, failure surface shape and stress-strain curve of undisturbed loess. |
关键词 | Freeze-thaw action Undisturbed loess Triaxial shear test Failure form Stress-strain curve |
DOI | 10.28927/SR.2024.005822 |
收录类别 | ESCI |
语种 | 英语 |
资助项目 | National Natural Science Foundation of China [51769013, 52168052]; China Energy Construction Group Gansu Electric Power Design Institute Co., LTD.; Science and Technology Project |
WOS研究方向 | Engineering |
WOS类目 | Engineering, Geological |
WOS记录号 | WOS:001167534100012 |
出版者 | BRAZILIAN ASSOC SOIL MECH & GEOTECH ENGN, PORTUGUESE GEOTECH SOC |
原始文献类型 | Article |
EISSN | 2675-5475 |
引用统计 | 无
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文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/169886 |
专题 | 土木工程学院 法学院 |
通讯作者 | Chou, Yaling |
作者单位 | Lanzhou Univ Technol, Key Lab Disaster Prevent & Mitigat Civil Engn Gans, Lanzhou, Gansu, Peoples R China |
第一作者单位 | 兰州理工大学 |
通讯作者单位 | 兰州理工大学 |
第一作者的第一单位 | 兰州理工大学 |
推荐引用方式 GB/T 7714 | Yang, Shuangshuang,Chou, Yaling,Wang, Lijie,et al. Experimental study on mechanical behavior deterioration of undisturbed loess considering freeze-thaw action[J]. SOILS AND ROCKS,2024,47(1). |
APA | Yang, Shuangshuang,Chou, Yaling,Wang, Lijie,&Zhang, Peng.(2024).Experimental study on mechanical behavior deterioration of undisturbed loess considering freeze-thaw action.SOILS AND ROCKS,47(1). |
MLA | Yang, Shuangshuang,et al."Experimental study on mechanical behavior deterioration of undisturbed loess considering freeze-thaw action".SOILS AND ROCKS 47.1(2024). |
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