土的导热系数与其干密度、饱和度和温度的关系

摘要

Using the transient method,this paper tests the thermal conductivities of the sand,silt and silty clay in different dry density,saturation and temperature by employing a probe at certain heating power,and obtains the change rule of three kinds of soil and the experience formula. The research shows that the thermal conductivity in-creases with the dry density and saturation,and its change with temperature is not monotonic linear.%采用瞬态法，利用探针施加一恒定加热功率，对砂土、粉土和粉质黏土在不同干密度、不同饱和度和不同温度条件下的导热系数进行了测试，得到了3种土导热系数的变化规律和经验公式。研究表明，导热系数随干密度和饱和度的增大而增大，随温度的变化并不是线性单调的。