Preparation of target for frozen soil anti-penetration test and numerical simulation of frozen temperature field
There are significant differences in thermal physics of frozen soil under different storage temperatures.Before analysing anti-penetration properties of permafrost in high-cold and high-altitude permafrost areas,it is the most basic and important work to prepare frozen soil target that meets the temperature control requirements as well as revealing the distribution law of temperature fields.By studying the coupling influence of thermophysical parameters on the preparation of frozen soil targets at different temperatures,obtain the internal temperature gradient distribution law of the frozen target required for the model test,and determine the time required for the test target to reach the set temperature.The target preparation technology of frozen soil anti-penetration test is expounded and the numerical simulation of the temperature fields of three typical frozen soil anti-penetration targets,including frozen clay,frozen sand,and frozen silt,is carried out.The study shows that under the same conditions,the time required for the temperature gradient inside the silt target to reach consistency is the longest,followed by the clay target,and sand target requires the shortest time,which provides a basis for the subsequent test.
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维普
