短时冻区花岗岩残积土冻结温度试验研究

为了解短时冻区花岗岩残积土的冻结温度值,以福建省短时冻区花岗岩残积土为例,通过测温试验,分析土壤冻结温度随残积土含水率及含盐率的变化规律。结果表明:不同含盐率导致黄壤和红壤两种典型土冻结温度差别显著。随着含水率的增大,土样冻结温度呈现升高趋势,而随着含盐率的增加,试样冻结温度明显降低,并对曲线分别进行数据拟合得出相应的公式。

Experimental Study on Freezing Temperature of Granite Residual Soil in Short-term Frozen Area

In order to find out the freezing temperature value of granite residual soil in short-term frozen area, herein the granite residual soil in short-term frozen area in Fujian Province was taken as an example, and by temperature measuring test, to analyze the law how this temperature changes with the water and salt content of residual soil. The result shows that, the different salt content may lead to significant difference between the freezing temperature of two typical soil, i.e. yellow and red soil; the freezing temperature of soil sample shows a rising trend with the increase of water content, while drops sharply with the increase of salt content. Then the relevant formulas are obtained by data fitting according to the curves respectively.