Analysis of influence factors for field heat response test of ground heat conduction coefficient

Studies the effect of testing time, abnegating initial time and heating power on heat conduction coefficient of ground rock and soil within the depth scope of buried pipe with consecutive 15 and 6.25 days of rock thermal response test on a test well in Jiaxing. The results show that the measured heat conduction coefficient is relatively stable when test time is from 72 to 96 hours. The abnegating initial time should be determined according to the heating power. The larger the heating power is, the smaller the heat conduction coefficient is.