| Autor: |
Wang, Liping, Li, Ning, Tian, Yanzhe, Liu, Naifei, Xu, Shuanhai |
| Zdroj: |
Arabian Journal of Geosciences; Jan2022, Vol. 15 Issue 1, p1-8, 8p |
| Abstrakt: |
The formation and growth of ice layers in fractured rock masses are one of the main causes of frost weathering in bedrock in cold regions. The growth of ice layers requires a continuous supply of water; when there is no nearby recharge water source on the Earth's surface, the water may migrate upward from deep groundwater to the ice layer through fractures. To study the migration of capillary water in vertical parallel-plate bedrock fractures in cold regions, the authors developed test equipment, simulated vertical parallel-plate fractures in rock masses with spliced samples of plexiglass plates, and carried out an experimental study on water migration with a temperature gradient. The experimental results and theoretical analysis of the parallel plates based on the Young–Laplace equation showed that, in the temperature ranges involved in cold regions, the effect of temperature gradients on capillary water migration in vertical parallel-plate fractures can be ignored. According to the Wenzel model combined with the fractal dimension theory of rock surfaces, the apparent contact angle for rock surfaces tends toward zero, indicating that rock surfaces are completely hydrophilic. Therefore, the height of capillary water migration in the vertical parallel-plate fractures of the rock mass in cold regions is mainly determined by the gap width. When the gap width is less than or equal to 0.1 mm, the height of capillary water migration in the fractures becomes significant. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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