Effects of original ground temperature on the temperature
Effects of original ground temperature on the temperature-thawing time response and required thawing time for frozen soil curtain: (a) temperature-thawing time response at X = 3 m (monitor point 2 ...
Furthermore, sensitivity analysis of influencing factors such as the thermal conductivity, latent heat of phase change, ambient temperature inside tunnel, freezing time , and original ground ...
Key Details About Effects Of Original Ground Temperature On The Temperature Thawing Time
The results obtained in this paper can be directly applied to address scientific problems such as the time requirements for unidirectional freezing ( thawing ) and freeze-thaw cycling tests of soil columns, the acquisition of the frozen ground initial temperature field, and the impact of construction time on subgrade disasters in cold regions.
During thawing , the initial thawing temperature of clay was generally below 0 °C, and the thawing temperature exhibited a power function relationship with total water content. Model analysis revealed hysteresis effects in the unfrozen water content curve during freeze-thaw cycles.
Model Test Study on Natural Thawing Temperature Field of ...
The soil temperature in the natural thawing process went through the four stages of a rapid rise, short hysteresis, a second rapid rise, and a linear slow rise. By fitting the test data, the distribution function of the pipe wall temperature along the pipe length under natural thawing conditions was obtained.
In this study, the variations of the temperatures and volumetric unfrozen water contents for two fine-grained soils (i.e., silty clay and silt) with high degrees of saturation during a freezing- thawing process were experimentally studied. Experimental results show that for the two soils, the supercooling phenomenon only happens in the early stage of freezing process, and the supercooling ...
Experimental study of freeze
These complex processes have significant consequences for soil engineering structures and emphasize the need for practical solutions to mitigate the effects of freeze-thaw cycles. To mitigate the adverse effects of temperature differences on soil and prevent volumetric deformations, engineers employ various methods of soil thermal protection.
Plain Language Summary Understanding the freezing and thawing behavior of soils is critical for construction in cold regions. The soil freezing characteristic curve (SFCC), which describes the relationship between temperature and unfrozen water content, is essential for characterizing soil behavior during freeze-thaw cycles.
A New Frozen Soil Parameterization Including Frost and Thaw Fronts in ...
The model was also used for year-long simulations of soil temperature and freeze-thaw processes to check its applicability in continuous simulation. The results show that CLM4.5_FTF performed better than the original model, and the improvement was better for lower levels than for the upper level.
To reduce the influence of unfrozen water content and thermal parameter variations caused by freeze-thaw cycles on temperature field predictions, the water content of unfrozen sand and clay was measured during freeze and thaw. The specific heat capacity, apparent specific heat capacity, and thermal conductivity of frozen soil were calculated using the mass-weighted average, equivalent latent ...