人工冻结过程中温度场的试验研究

为了研究人工冻结过程中温度场的变化规律，利用自行研制的人工冻结冻胀融沉模型试验装置，对徐州地区常见的粘土进行了12次大规模的冻融试验，分别模拟了封闭系统和开敞系统下人工冻土中温度场的变化情况，并与现场实测数据进行了分析比较，提出了在冻土体和受冻结影响的土体中的温度与距离分别近似成线性，已冻土体中的温度梯度比未受冻结影响土体中的大等几点结论．

Experimental Study of Temperature Field in Course of Artificial Freezing

The temperature field in the course of artificial freezing is not only one of important factors affecting the freezing process and the frost heave and thawing settlement, but also one of major foundations for predicting and numerical simulating the frost heave. 12 freezing and thawing experiments on the clay in Xuzhou have been carried out in order to study the laws of the temperature field and obtain the information for predicting the frost heave and numerical simulation of the artificially frozen soil. The self-made test device for studying the frost heave and thawing settlement has been used. The developing laws of the temperature field of artificially frozen soil in the close and the open systems have been studied. The reliability of the test data has been verified by means of comparing with the on-the-spot test data. Some useful conclusions have been obtained. For example, the relationship between the temperature and the distance is linear in the frozen part, so is it in the affected part. The temperature gradient is bigger in the frozen part than that in the affected part and so on.