稳态平板热流计法岩土导热系数的室内测定

The Laboratory Testing of Rock and Soil Thermal Conductivity Using Steady Plate Heat Flux Gage Method

随着浅层地热能广泛应用于工业、居民生活,岩土热物性指标的测试技术日益提高,岩土的导热系数的测试方法也不断更新。稳态平板热流计法测试岩土的导热系数以其准确、操作简单、成本低廉等优点被各试验室所接受;但是由于缺少相关统一规范,在检测过程中难免会出现结果的偏差。为此以DRPL-Ⅱ平板热流计法导热系数仪为例,探讨该试验方法的一些操作要点、注意事项等。据文内示例数据显示,该方法能够满足本行业测试技术要求,为室内获取岩土试件导热系数数值的可靠方法。

With the shallow geothermal energy widely using in industry and residents？ livelihood,the test technology of rock and soil thermal physical index develops quickly. Meanwhile the method of testing is updating continuously. The steady plate heat flux gage method which is used in testing conductivity are adopted by most laboratories because of its accuracy,simply operation and low cost. But for the lack of interrelated rule,the deviation of result in the course of testing is inevitable. Take DRPL-Ⅱfor instance to discuss this method？s operation points,attention and result analysis. According to the sample date,the method can meet the requirements of testing technology of this iudustry,and provide reliable meth-od for obtaining numerical heat trausfer coefficient of indoor geotechnical sample.