Method and device for detecting thermal physical parameters of rock through press-in in-site delamination

Abstract

The invention discloses a device for detecting thermal physical parameters of rock through press-in in-site delamination, and the device comprises an in-site probe (2) with a threaded connector (1), wherein a probe cavity (10) is arranged in the in-site probe (2); a hydraulic box component and an in-site needle (5) are arranged in the probe cavity (10); the in-site needle (5) comprises a needle pipe (17) and a needle tip (18); a heating filament (14) and a thermocouple (13) are respectively arranged in the inner cavity (15) of the needle pipe (17); a low-heat-capacity filler (16) made of a low-heat-capacity material is filled in the inner cavity (15) of the needle pipe (17); the needle pipe (17) is fixedly connected with the bottom of a piston (4); a heating wire (21) is connected with the heating filament (14); and a temperature receiving wire (11) is connected with the thermocouple (13). The invention simultaneously provides a method for detecting the thermal physical parameters of the rock through the press-in in-site delamination by utilizing the device.

Description

technical field [0001] The invention relates to a method for in-situ testing of thermal physical parameters of rock and soil, in particular to a method for on-site testing of thermal physical parameters of rock and soil layers with any buried depth by means of static pressure. Background technique [0002] Currently there is no method that can test the thermophysical parameters of rock and soil layers at any buried depth in situ. The existing method for testing the thermal properties of layered rock and soil is as follows: sampling rock and soil with different buried depths in the laboratory, and then performing a thermal physical property test on the taken out rock and soil samples, so as to obtain corresponding parameters. [0003] In the process of sampling rock and soil from the site to the laboratory, there are serious problems as follows: first, the structure of the rock and soil is destroyed during the sampling and transportation process; The third is that the deep r...

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Problems solved by technology

[0003] In the process of sampling the rock and soil from the site to the laboratory, there are serious problems as follows: first, the structure of the rock and soil is destroyed during the sampling and transportation process; The third is that the deep rock and soil mass is taken above the ground, and the sample taken out becomes loose after unloading and rebounding; the fourth is that due to the volume limitation of the test soil sample, it is difficult to satisfy the assumption that the boundary between the linear heat source and the measured rock and soil mass is infinite

Due to the limitation of the soil sample volume in the indoor test, the heat from the line heat source will quickly affect the soil sample boundary, resulting in untrue test data

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