Coupling Action of Cooling and Dynamic Load Impact on Deformation Characteristics of High-Salinity Saline Soils
In order to grasp the characteristics and mechanism of saline soil deformation under the coupling action of cooling and dynamic load, three types of subgrade fillings from the Qarhan-Golmud Highway in Qinghai-Tibet Plateau were selected as experimental soil samples for the experimental study. Firstl...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/2304164 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832561598648025088 |
|---|---|
| author | Yu Zhang Meisi Zou Runze Tian Anhua Xu Yunlong Hou Bingbing Han Xuemei Li |
| author_facet | Yu Zhang Meisi Zou Runze Tian Anhua Xu Yunlong Hou Bingbing Han Xuemei Li |
| author_sort | Yu Zhang |
| collection | DOAJ |
| description | In order to grasp the characteristics and mechanism of saline soil deformation under the coupling action of cooling and dynamic load, three types of subgrade fillings from the Qarhan-Golmud Highway in Qinghai-Tibet Plateau were selected as experimental soil samples for the experimental study. Firstly, the freezing temperature experiment was carried out on SS (sandy silt) and HS (high-sulfate silty clay). The test results showed that the freezing temperature of SS is -0.32°C, while that of HC (high-chloride silty clay) and HS will not freeze at -20°C, due to the presence of salt. Secondly, the three soil samples were subjected to deformation characteristic test under coupling action of cooling and dynamic load, respectively, and the time history curve of temperature gradient change, the time history curve of the change rate of deformation, and deformation rate were summarized. Finally, the model of deformation rate vs. time and the model of change rate of deformation vs. deformation rate under the coupling action of cooling and dynamic load are proposed. The test results found that (1) the cooling rate of the temperature gradient curve of the three soil samples showed a rapid cooling rate in the early stage, and it tends to stabilize in the later stage. The distance of the 0°C line from the top gradually decreases, which is affected by the freezing temperature and the salt content. (2) Affected by the freezing temperature and salt type, SS exhibits frost heave, and HS and HC appear to settlement. The final deformation is 1.0%, -0.73%, and -1.10%, respectively. (3) The model of deformation rate vs. time and the model of change rate of deformation vs. deformation rate under the coupling action of cooling and dynamic load were proposed and verified, which are helpful for the evaluation of engineering stability on saline soil subgrade fillings. |
| format | Article |
| id | doaj-art-dfaccdf4da4a48aab9b2bafb280f3d3d |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-dfaccdf4da4a48aab9b2bafb280f3d3d2025-02-03T01:24:42ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/23041642304164Coupling Action of Cooling and Dynamic Load Impact on Deformation Characteristics of High-Salinity Saline SoilsYu Zhang0Meisi Zou1Runze Tian2Anhua Xu3Yunlong Hou4Bingbing Han5Xuemei Li6School of Traffic and Transportation, Lanzhou Jiaotong University, Lanzhou 730070, ChinaSchool of Automotive Engineering, Jiujiang Vocational and Technical College, Jiujiang 332005, ChinaSchool of Traffic and Transportation, Lanzhou Jiaotong University, Lanzhou 730070, ChinaQinghai Communications Technical College, Xining 810003, ChinaGansu Institute of Engineering Geology, Lanzhou 730000, ChinaGansu Institute of Engineering Geology, Lanzhou 730000, ChinaFaculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, ChinaIn order to grasp the characteristics and mechanism of saline soil deformation under the coupling action of cooling and dynamic load, three types of subgrade fillings from the Qarhan-Golmud Highway in Qinghai-Tibet Plateau were selected as experimental soil samples for the experimental study. Firstly, the freezing temperature experiment was carried out on SS (sandy silt) and HS (high-sulfate silty clay). The test results showed that the freezing temperature of SS is -0.32°C, while that of HC (high-chloride silty clay) and HS will not freeze at -20°C, due to the presence of salt. Secondly, the three soil samples were subjected to deformation characteristic test under coupling action of cooling and dynamic load, respectively, and the time history curve of temperature gradient change, the time history curve of the change rate of deformation, and deformation rate were summarized. Finally, the model of deformation rate vs. time and the model of change rate of deformation vs. deformation rate under the coupling action of cooling and dynamic load are proposed. The test results found that (1) the cooling rate of the temperature gradient curve of the three soil samples showed a rapid cooling rate in the early stage, and it tends to stabilize in the later stage. The distance of the 0°C line from the top gradually decreases, which is affected by the freezing temperature and the salt content. (2) Affected by the freezing temperature and salt type, SS exhibits frost heave, and HS and HC appear to settlement. The final deformation is 1.0%, -0.73%, and -1.10%, respectively. (3) The model of deformation rate vs. time and the model of change rate of deformation vs. deformation rate under the coupling action of cooling and dynamic load were proposed and verified, which are helpful for the evaluation of engineering stability on saline soil subgrade fillings.http://dx.doi.org/10.1155/2021/2304164 |
| spellingShingle | Yu Zhang Meisi Zou Runze Tian Anhua Xu Yunlong Hou Bingbing Han Xuemei Li Coupling Action of Cooling and Dynamic Load Impact on Deformation Characteristics of High-Salinity Saline Soils Geofluids |
| title | Coupling Action of Cooling and Dynamic Load Impact on Deformation Characteristics of High-Salinity Saline Soils |
| title_full | Coupling Action of Cooling and Dynamic Load Impact on Deformation Characteristics of High-Salinity Saline Soils |
| title_fullStr | Coupling Action of Cooling and Dynamic Load Impact on Deformation Characteristics of High-Salinity Saline Soils |
| title_full_unstemmed | Coupling Action of Cooling and Dynamic Load Impact on Deformation Characteristics of High-Salinity Saline Soils |
| title_short | Coupling Action of Cooling and Dynamic Load Impact on Deformation Characteristics of High-Salinity Saline Soils |
| title_sort | coupling action of cooling and dynamic load impact on deformation characteristics of high salinity saline soils |
| url | http://dx.doi.org/10.1155/2021/2304164 |
| work_keys_str_mv | AT yuzhang couplingactionofcoolinganddynamicloadimpactondeformationcharacteristicsofhighsalinitysalinesoils AT meisizou couplingactionofcoolinganddynamicloadimpactondeformationcharacteristicsofhighsalinitysalinesoils AT runzetian couplingactionofcoolinganddynamicloadimpactondeformationcharacteristicsofhighsalinitysalinesoils AT anhuaxu couplingactionofcoolinganddynamicloadimpactondeformationcharacteristicsofhighsalinitysalinesoils AT yunlonghou couplingactionofcoolinganddynamicloadimpactondeformationcharacteristicsofhighsalinitysalinesoils AT bingbinghan couplingactionofcoolinganddynamicloadimpactondeformationcharacteristicsofhighsalinitysalinesoils AT xuemeili couplingactionofcoolinganddynamicloadimpactondeformationcharacteristicsofhighsalinitysalinesoils |