武汉地区三级阶地粘性土热物理性质试验研究

摘要

It is very important to make research on the relationship of thermal property with temperature, density, moisture content and void ratio of clayey soil.During the detailed explored phase of Wuhan metro engineering, experiment of thermal property and soil test were conducted under different temperatures by taking undisturbed 26 samples of clayey soil in three-stage terrace.Experimental studies prove that temperature during testing influences results slightly; thermal conductivity increases with increases of density and decreases with increases of void ratio specific heat increases with increase of moisture content increasing.Empirical formulas are given to calculate the thermal conductivity and specific heat, which is easy to operate in engineering design.%研究粘性土热物理性质与温度、密度、含水量及孔隙比等参数间的关系.在武汉地铁详勘阶段,采取三级阶地粘性土原状土样26组,在不同室温下进行热物理性质试验,同时测试土样的含水量及密度.结果表明:测试温度对原状土样导热系数及比热容的影响较小;粘性土导热系数随原状土样密度的增加而增加,随孔隙比的增加而降低;比热容随原状土样含水量的增加而增加.并给出便于工程使用的导热系数及比热容计算公式.