- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | HE Fei, WANG Xu, JIANG Daijun, ZHOU Yalong, LI Junshan, CHEN Hangjie, CHEN Mingwei. Creep Characteristics of Frozen Sand-Concrete Interface Based on Ice Content[J]. Journal of Southwest Jiaotong University, 2024, 59(2): 361-368. doi: 10.3969/j.issn.0258-2724.20220552
|
Ensuring the long-term stability of the pile foundation in ice-rich frozen soil areas is the key to the safe use of bridge pile foundations in permafrost areas. In order to analyze the influence of ice content on the creep characteristics of the frozen sand-concrete interface, the creep tests of the frozen sand-concrete interface with ice content of 6%, 12%, 16%, 23%, 36%, 60%, and 80% were carried out under −2 ℃ by using self-designed large-scale shear apparatus. According to the test results, except for the accelerated creep of the specimen with 6% ice content, other specimens only experience decay creep and stable creep stages under constant shear stress. With the increase in ice content, the proportion of viscous deformation in the specimen increases, and the viscous deformation in the specimen with 80% ice content exceeds 80% of the total deformation. The stable creep speed is affected comprehensively by the dry density and ice content and is the lowest when the ice content is 16%. Burgers viscoelastic model can simulate the creep curve of frozen sand-concrete interface with high ice content better. With the increase in ice content, the initial shear modulus and viscosity coefficient at the stable creep stage increase first and decrease then. The progressive shear modulus at the initial creep stage decreases exponentially, and the viscosity coefficient at the initial creep stage increases exponentially.
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HE Fei, WANG Xu, JIANG Daijun, ZHOU Yalong, LI Junshan, CHEN Hangjie, CHEN Mingwei. Creep Characteristics of Frozen Sand-Concrete Interface Based on Ice Content[J]. Journal of Southwest Jiaotong University, 2024, 59(2): 361-368. doi: 10.3969/j.issn.0258-2724.20220552
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