Measuring solid percentage of saturated soil using single probe heat pulse method
This study took two typical saturated soils with different moisture contents oil sand tailings soil as an example.Using two independent single probes and based on the thermal pulse method and Blackwell equation,three methods for obtaining contact thermal conductivity were proposed:HT,HK,and Hav methods.The applicability of different methods was tested by comparing the values measured by the thermal pulse method with the true values obtained by the drying method.The results showed that the thermal conductivity,thermal diffusivity,and heat capacity of different soil samples measured by different single probes were basically consistent,indicating that the differences in contact thermal conductivity caused by probes did not affect the determination of soil thermal characteristics.However,there were significant differences in diffusion rate and heat capacity under the HT,HK and Hav method.The single probe thermal pulse method based on the HT method had better consistency and stability in measuring the solid percentage of oil sand tailings in different scenarios compared to the drying method and can pro-vide reliable results for measuring the dry and wet conditions of saturated soil with silt.Although the HK and Hav method performed well in the first set of samples,the accuracy of the measurement results for the second set of sam-ples was not high,indicating the limitations of pre-calibration methods for the contact thermal conductivity values of the same probe.It is still necessary to obtain the contact thermal conductivity values by fitting the temperature rise curve.
万方数据
维普
