Measurement and modeling of excess pore-water pressure in warm saturated frozen soil based on dynamic loading effect
Measuring pore-water pressure (PWP) in frozen soils poses significant challenges in geotechnical testing experiments, and understanding PWP is crucial for unraveling the mechanism of frost heave generation in cold regions. This paper aims to clarify the development pattern of PWP in frozen soil thro...
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| Language: | English |
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Elsevier
2025-01-01
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| Series: | Alexandria Engineering Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016824011633 |
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| author | Hu Zhang Jintao Hu Zheng Li Bo Zheng Huijun Jin Yaling Chou Hongchun Li Ming Lu Suiqiao Yang |
| author_facet | Hu Zhang Jintao Hu Zheng Li Bo Zheng Huijun Jin Yaling Chou Hongchun Li Ming Lu Suiqiao Yang |
| author_sort | Hu Zhang |
| collection | DOAJ |
| description | Measuring pore-water pressure (PWP) in frozen soils poses significant challenges in geotechnical testing experiments, and understanding PWP is crucial for unraveling the mechanism of frost heave generation in cold regions. This paper aims to clarify the development pattern of PWP in frozen soil through laboratory tests, specifically focusing on excess PWP generated under dynamic loading. Seven sets of triaxial tests were conducted to investigate the variations in excess PWP and deformation influenced by temperature, dynamic stress amplitude, and dry density. The results reveal that excess PWP in warm saturated frozen soil undergoes two stages: pore pressure increase and dissipation. The change of external factors mainly affects the peak value of excess PWP and the change rate of excess PWP. Unlike unfrozen soil, excess PWP has a small dissipation rate after the peak and may remain dynamically stable in the later stage of loading. In addition, two empirical models of excess PWP applicable to saturated frozen soils were proposed based on the developmental patterns of excess PWP in frozen soils, and the feasibility was validated using the results obtained from laboratory tests. The model is of great significance for predicting the development of excess PWP in frozen soil under dynamic load. |
| format | Article |
| id | doaj-art-4f0c45f01f5f46aebbec340e63f7a4b7 |
| institution | Kabale University |
| issn | 1110-0168 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj-art-4f0c45f01f5f46aebbec340e63f7a4b72025-01-09T06:13:22ZengElsevierAlexandria Engineering Journal1110-01682025-01-01110132144Measurement and modeling of excess pore-water pressure in warm saturated frozen soil based on dynamic loading effectHu Zhang0Jintao Hu1Zheng Li2Bo Zheng3Huijun Jin4Yaling Chou5Hongchun Li6Ming Lu7Suiqiao Yang8School of Civil Engineering and Transportation, Northeast Forestry University, Harbin, Heilongjiang Province 150040, China; State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu Province 730000, China; Corresponding author at: School of Civil Engineering and Transportation, Northeast Forestry University, Harbin, Heilongjiang Province 150040, China.School of Civil Engineering and Transportation, Northeast Forestry University, Harbin, Heilongjiang Province 150040, ChinaCollege of Civil Engineering, Lanzhou University of Technology, Lanzhou, Gansu Province 730000, ChinaSouthwest Research Institute Co. Ltd. of C.R.E.C., Chengdu, Sichuan Province 611731, ChinaSchool of Civil Engineering and Transportation, Northeast Forestry University, Harbin, Heilongjiang Province 150040, China; State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu Province 730000, ChinaCollege of Civil Engineering, Lanzhou University of Technology, Lanzhou, Gansu Province 730000, ChinaSchool of Civil Engineering and Transportation, Northeast Forestry University, Harbin, Heilongjiang Province 150040, ChinaSchool of Civil Engineering and Transportation, Northeast Forestry University, Harbin, Heilongjiang Province 150040, ChinaSchool of Civil Engineering and Transportation, Northeast Forestry University, Harbin, Heilongjiang Province 150040, ChinaMeasuring pore-water pressure (PWP) in frozen soils poses significant challenges in geotechnical testing experiments, and understanding PWP is crucial for unraveling the mechanism of frost heave generation in cold regions. This paper aims to clarify the development pattern of PWP in frozen soil through laboratory tests, specifically focusing on excess PWP generated under dynamic loading. Seven sets of triaxial tests were conducted to investigate the variations in excess PWP and deformation influenced by temperature, dynamic stress amplitude, and dry density. The results reveal that excess PWP in warm saturated frozen soil undergoes two stages: pore pressure increase and dissipation. The change of external factors mainly affects the peak value of excess PWP and the change rate of excess PWP. Unlike unfrozen soil, excess PWP has a small dissipation rate after the peak and may remain dynamically stable in the later stage of loading. In addition, two empirical models of excess PWP applicable to saturated frozen soils were proposed based on the developmental patterns of excess PWP in frozen soils, and the feasibility was validated using the results obtained from laboratory tests. The model is of great significance for predicting the development of excess PWP in frozen soil under dynamic load.http://www.sciencedirect.com/science/article/pii/S1110016824011633Dynamic triaxialFrozen soilExcess pore-water pressurePore pressure model |
| spellingShingle | Hu Zhang Jintao Hu Zheng Li Bo Zheng Huijun Jin Yaling Chou Hongchun Li Ming Lu Suiqiao Yang Measurement and modeling of excess pore-water pressure in warm saturated frozen soil based on dynamic loading effect Alexandria Engineering Journal Dynamic triaxial Frozen soil Excess pore-water pressure Pore pressure model |
| title | Measurement and modeling of excess pore-water pressure in warm saturated frozen soil based on dynamic loading effect |
| title_full | Measurement and modeling of excess pore-water pressure in warm saturated frozen soil based on dynamic loading effect |
| title_fullStr | Measurement and modeling of excess pore-water pressure in warm saturated frozen soil based on dynamic loading effect |
| title_full_unstemmed | Measurement and modeling of excess pore-water pressure in warm saturated frozen soil based on dynamic loading effect |
| title_short | Measurement and modeling of excess pore-water pressure in warm saturated frozen soil based on dynamic loading effect |
| title_sort | measurement and modeling of excess pore water pressure in warm saturated frozen soil based on dynamic loading effect |
| topic | Dynamic triaxial Frozen soil Excess pore-water pressure Pore pressure model |
| url | http://www.sciencedirect.com/science/article/pii/S1110016824011633 |
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