Deterioration Characteristics of Pre-flawed Granites Subjected to Freeze-Thaw Cycles and Compression
| Autor: | Chen Qiao, Yu Wang, Yong-jie Tong, He-ping Yang, Changhong Li |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
0211 other engineering and technologies Frost heaving Soil Science Uniaxial compression Geology 02 engineering and technology 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences eye diseases Stress (mechanics) Volume expansion Architecture Crack size Geotechnical engineering Compression (geology) Rock mass classification Loss rate 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Geotechnical and Geological Engineering. 39:5907-5916 |
| ISSN: | 1573-1529 0960-3182 |
| Popis: | In order to reveal the evolution characteristics of the frost heaving pressure caused by the water–ice phase transition and volume expansion of the fractured rock mass subjected to the periodic freeze-thaw cycles, and the degradation effect of the freeze-thaw cycle on the mechanical properties of the fractured rocks, the long-term frost heaving pressure monitoring and uniaxial compression test were carried out on saturated fractured granite with different crack size. The results show that the evolution curve of frost heaving pressure can be divided into five stages. With the increase of freeze-thaw cycles, the peak frost heaving pressure decreases exponentially. The peak frost heaving pressure increases linearly with the increase of crack length. The influence of size effect on frost heaving pressure decreases with the increase of freeze-thaw cycles. As the number of freeze-thaw cycles increases, the rate of P-wave velocity decreases gradually. The peak stress loss rate of rock with different crack length increases in the form of power function with the increase of freeze-thaw cycles. The peak strain changes in the form of quadratic polynomial function with the increase of freeze-thaw cycles. The research results can provide reference for theoretical calculation and numerical analysis of frost heaving pressure of fractured rock mass in cold regions. |
| Databáze: | OpenAIRE |
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