Rock thermophysics on-site test method under non-constant power condition
An on-site testing, non-constant technology, applied in soil material testing, measuring devices, material thermal analysis, etc., can solve problems such as power instability, test failure, and long test cycle, so as to reduce stability requirements and test costs , the effect of shortening the test time
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[0058] The method of the invention is used to test the thermal physical parameters of underground rock and soil in a construction site. In this test, the depth of the buried pipe is 100 meters, and the geological composition is: 1-3 meters is clay, and 3-100 meters is sandstone. About 24 hours after the start of the test, the heating of the tester was interrupted for about 40 minutes due to power supply. After restarting the heater, the test continued for about 4 hours, and the heating was interrupted again for about 14 hours due to power supply. Thereafter, restart the heater again, continue the test for about 6 hours, and then stop the test. The test results show that the average thermal conductivity of underground rock and soil is 3.18W / m℃, and the average volumetric specific heat is 2.59×10 6 J / m3 ℃. Figure 4 It is a comparison between the actual measurement of the change of the average temperature of the circulating water in the buried pipe with time and the average t...
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