Leakage detection method of buried heating pipelines based on soil temperature and humidity

According to the practical problems in the leakage test of buried heating pipelines, analyses the soil surface temperature field and the soil moisture change above the pipeline when the leakage of the buried heating pipeline exists and the thermal insulation layer is damaged. According to the operation mode of thermal pipeline in practical engineering, sets up a simplified experimental platform for thermal operation of buried heating pipeline. Carries out the experiments on the intact insulation layer, the damage of the upper, lateral and lower sides of the insulation layer, and the leakage at the upper, lateral and lower sides of the pipelines. Records the temperature and humidity information of the soil during the experiment by infrared thermal imager and soil moisture analyzer, analyses the influence of heat and mass transfer on the soil temperature and humidity at the top of the pipeline when the pipeline leaks or the insulation layer is damaged, providing the more accurate and scientific basis for the detection and judgment of pipeline leakage in actual heating operation.