Investigating the Shear Characteristics of Geomembrane–Sand Interfaces Under Freezing Conditions
This study experimentally investigates the effects of freezing conditions on the shear characteristics of geomembrane–soil interfaces, employing a temperature-controlled direct shear apparatus. The findings reveal significant variations in shear stress–shear displacement patterns at the soil–geomemb...
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| Language: | English |
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MDPI AG
2025-01-01
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| Series: | Designs |
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| Online Access: | https://www.mdpi.com/2411-9660/9/1/9 |
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| author | Dun Chen Guoyu Li Pengfei He Hang Zhang Jie Sheng Miao Wang |
| author_facet | Dun Chen Guoyu Li Pengfei He Hang Zhang Jie Sheng Miao Wang |
| author_sort | Dun Chen |
| collection | DOAJ |
| description | This study experimentally investigates the effects of freezing conditions on the shear characteristics of geomembrane–soil interfaces, employing a temperature-controlled direct shear apparatus. The findings reveal significant variations in shear stress–shear displacement patterns at the soil–geomembrane interface under different thermal conditions. At positive temperatures, the interface manifests strain hardening behavior, whereas at negative temperatures, it transitions from weak softening at low normal stress to strong strain softening at high normal stress. The shear displacement–normal displacement curves under varying temperature and normal stress conditions demonstrate dilatant behavior, with initial increases in normal displacement followed by a decrease as temperature drops. Notably, the interface friction angle is markedly higher at negative temperatures compared to positive, undergoing an initial increase, a period of stable development, and a subsequent rise with further temperature reduction. The average shear strength ratio at the interface is observed to be as low as 0.58 at 20 °C, approaches unity between −2 °C and −6 °C, and exhibits a significant increase at −10 °C. These findings are helpful for the application of geomembranes in frozen soil engineering. |
| format | Article |
| id | doaj-art-ae8034cbd8a346b78e36c4e391e55eb5 |
| institution | DOAJ |
| issn | 2411-9660 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Designs |
| spelling | doaj-art-ae8034cbd8a346b78e36c4e391e55eb52025-08-20T03:12:08ZengMDPI AGDesigns2411-96602025-01-0191910.3390/designs9010009Investigating the Shear Characteristics of Geomembrane–Sand Interfaces Under Freezing ConditionsDun Chen0Guoyu Li1Pengfei He2Hang Zhang3Jie Sheng4Miao Wang5State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, 320 Donggangxilu Rd., Lanzhou 730000, ChinaState Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, 320 Donggangxilu Rd., Lanzhou 730000, ChinaSchool of Civil Engineering, Lanzhou University of Technology, 287 Langongping Rd., Lanzhou 730000, ChinaElectric Power Research Institute, State Grid Heilongjiang Electric Power Company Limited, Harbin 150030, ChinaElectric Power Research Institute, State Grid Heilongjiang Electric Power Company Limited, Harbin 150030, ChinaHeilongjiang Provincial Hydraulic Research Institute, Harbin 150050, ChinaThis study experimentally investigates the effects of freezing conditions on the shear characteristics of geomembrane–soil interfaces, employing a temperature-controlled direct shear apparatus. The findings reveal significant variations in shear stress–shear displacement patterns at the soil–geomembrane interface under different thermal conditions. At positive temperatures, the interface manifests strain hardening behavior, whereas at negative temperatures, it transitions from weak softening at low normal stress to strong strain softening at high normal stress. The shear displacement–normal displacement curves under varying temperature and normal stress conditions demonstrate dilatant behavior, with initial increases in normal displacement followed by a decrease as temperature drops. Notably, the interface friction angle is markedly higher at negative temperatures compared to positive, undergoing an initial increase, a period of stable development, and a subsequent rise with further temperature reduction. The average shear strength ratio at the interface is observed to be as low as 0.58 at 20 °C, approaches unity between −2 °C and −6 °C, and exhibits a significant increase at −10 °C. These findings are helpful for the application of geomembranes in frozen soil engineering.https://www.mdpi.com/2411-9660/9/1/9soil–geosynthetic interactionshear strengthstrength ratiofrozen soilfriction angle |
| spellingShingle | Dun Chen Guoyu Li Pengfei He Hang Zhang Jie Sheng Miao Wang Investigating the Shear Characteristics of Geomembrane–Sand Interfaces Under Freezing Conditions Designs soil–geosynthetic interaction shear strength strength ratio frozen soil friction angle |
| title | Investigating the Shear Characteristics of Geomembrane–Sand Interfaces Under Freezing Conditions |
| title_full | Investigating the Shear Characteristics of Geomembrane–Sand Interfaces Under Freezing Conditions |
| title_fullStr | Investigating the Shear Characteristics of Geomembrane–Sand Interfaces Under Freezing Conditions |
| title_full_unstemmed | Investigating the Shear Characteristics of Geomembrane–Sand Interfaces Under Freezing Conditions |
| title_short | Investigating the Shear Characteristics of Geomembrane–Sand Interfaces Under Freezing Conditions |
| title_sort | investigating the shear characteristics of geomembrane sand interfaces under freezing conditions |
| topic | soil–geosynthetic interaction shear strength strength ratio frozen soil friction angle |
| url | https://www.mdpi.com/2411-9660/9/1/9 |
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