Time-Dependence of the Mechanical Behavior of Loess after Dry-Wet Cycles
The structure, time-dependent mechanical deformation, and strength characteristics of loess, which is loose and porous with well-developed vertical joints, are greatly affected by the dry-wet cycles, which are attributed to periodic artificial irrigation, rainfall, and water evaporation. To better u...
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MDPI AG
2022-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/3/1212 |
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| author | Kai Liu Tianfeng Gu Xingang Wang Jiading Wang |
| author_facet | Kai Liu Tianfeng Gu Xingang Wang Jiading Wang |
| author_sort | Kai Liu |
| collection | DOAJ |
| description | The structure, time-dependent mechanical deformation, and strength characteristics of loess, which is loose and porous with well-developed vertical joints, are greatly affected by the dry-wet cycles, which are attributed to periodic artificial irrigation, rainfall, and water evaporation. To better understand the creep characteristics of loess under the effect of dry-wet cycles, Q<sub>2</sub> loess samples obtained from the South Jingyang County, China, were subjected to different dry-wet cycles (0, 5, 10, 15, 20) and sheared in triaxial creep tests. The experimental results revealed that: firstly, the maximum value of the deviatoric stress corresponding to creep failure gradually decreases with an increase in the dry-wet cycles. Secondly, the long-term strength of the loess after dry-wet cycles were obtained through the Isochronous Curve Method. It is found that the long-term strength and the number of dry-wet cycles showed an exponential decreasing relationship. In addition, the creep damage mechanism of loess due to dry-wet cycles is proposed. This study may provide the basis for understanding the mechanical behavior of the loess under the effect of dry-wet cycles, as well as guidelines for the prevention and prediction of loess landslide stability. |
| first_indexed | 2024-03-10T00:15:03Z |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T00:15:03Z |
| publishDate | 2022-01-01 |
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| spelling | doaj.art-783d3ca1629047739078062110441f0c2023-11-23T15:53:45ZengMDPI AGApplied Sciences2076-34172022-01-01123121210.3390/app12031212Time-Dependence of the Mechanical Behavior of Loess after Dry-Wet CyclesKai Liu0Tianfeng Gu1Xingang Wang2Jiading Wang3State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, ChinaState Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, ChinaState Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, ChinaState Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, ChinaThe structure, time-dependent mechanical deformation, and strength characteristics of loess, which is loose and porous with well-developed vertical joints, are greatly affected by the dry-wet cycles, which are attributed to periodic artificial irrigation, rainfall, and water evaporation. To better understand the creep characteristics of loess under the effect of dry-wet cycles, Q<sub>2</sub> loess samples obtained from the South Jingyang County, China, were subjected to different dry-wet cycles (0, 5, 10, 15, 20) and sheared in triaxial creep tests. The experimental results revealed that: firstly, the maximum value of the deviatoric stress corresponding to creep failure gradually decreases with an increase in the dry-wet cycles. Secondly, the long-term strength of the loess after dry-wet cycles were obtained through the Isochronous Curve Method. It is found that the long-term strength and the number of dry-wet cycles showed an exponential decreasing relationship. In addition, the creep damage mechanism of loess due to dry-wet cycles is proposed. This study may provide the basis for understanding the mechanical behavior of the loess under the effect of dry-wet cycles, as well as guidelines for the prevention and prediction of loess landslide stability.https://www.mdpi.com/2076-3417/12/3/1212loessdry-wet cyclestriaxial creep testcreep behaviorstrain-timelong-term strength |
| spellingShingle | Kai Liu Tianfeng Gu Xingang Wang Jiading Wang Time-Dependence of the Mechanical Behavior of Loess after Dry-Wet Cycles Applied Sciences loess dry-wet cycles triaxial creep test creep behavior strain-time long-term strength |
| title | Time-Dependence of the Mechanical Behavior of Loess after Dry-Wet Cycles |
| title_full | Time-Dependence of the Mechanical Behavior of Loess after Dry-Wet Cycles |
| title_fullStr | Time-Dependence of the Mechanical Behavior of Loess after Dry-Wet Cycles |
| title_full_unstemmed | Time-Dependence of the Mechanical Behavior of Loess after Dry-Wet Cycles |
| title_short | Time-Dependence of the Mechanical Behavior of Loess after Dry-Wet Cycles |
| title_sort | time dependence of the mechanical behavior of loess after dry wet cycles |
| topic | loess dry-wet cycles triaxial creep test creep behavior strain-time long-term strength |
| url | https://www.mdpi.com/2076-3417/12/3/1212 |
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