期刊
COLD REGIONS SCIENCE AND TECHNOLOGY
卷 192, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.coldregions.2021.103379
关键词
Frost heave; Stress level; Temperature gradient; Prediction model
资金
- National Natural Science Foundation of China [42171128, 41971076]
- National Key R&B Program of China [2016YFE0202400]
- Major Science and Technology Project of Xinjiang Uygur Autonomours Region [2018A03003-4]
This study found that temperature gradient is the core driving force of soil frost heave, while the increase of deviator stress and confining pressure would limit its development. Additionally, the growth of warm end temperature would also restrain soil frost heaving.
The frost heave of soil has a significant influence on the stability and durability of various infrastructures. It is necessary to investigate the occurrence mechanism and development law of soil frost heaving. In this research, a triaxial frost heave experimental setup was developed, and a series of frost heave experiments were carried out by considering different confining pressures, deviator stresses, temperature gradients, and water supply conditions. The research found that the temperature gradient was the core driving force of soil frost heave. The increase of deviator stress and confining pressure would limit the development of frost heave by inhibiting water absorption. The growth of warm end temperature would increase the temperature of both water supply and soil near the warm end, which restrained the development of soil frost heaving. Finally, an improved prediction model for saturated clay soil's frost heave ratio was developed based on Takashi's one-dimensional frost heave ratio model, considering the effects of stress level and temperature gradient.
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