Integrated device for in-situ testing of thermophysical property parameters of rock and soil

Abstract

The invention provides an integrated device for in-situ testing of thermophysical property parameters of rock and soil. The integrated device is characterized by comprising a spiral drill rod, wherein a holed conical probe is arranged at the bottom of the spiral drill rod, is conical and is filled with filler, a probe hole is formed in the vertex of the holed conical probe, a probe rod is arranged inside the spiral drill rod, the bottom of the probe rod is connected with a probe, a temperature sensor and a heating wire are encapsulated inside the probe and the probe rod, the heating wire is connected with a constant-voltage direct-current power supply, the temperature sensor is connected with a temperature receiver, the temperature receiver and the constant-voltage direct-current power supply are connected with a computer through a programmable logic controller, a GPS (Global Positioning System) navigator is connected with the computer, spiral blades which are in spiral distribution and are uniformly spaced are arranged on the outside surface of the spiral drill rod, and the spiral drill rod is fixedly connected with a mechanical rotator. According to the integrated device, the spiral drill rod can be conveniently injected into a soil layer at a certain speed and extend out the probe, so as to accurately test in-situ thermophysical property parameters of the rock and the soil.

Description

technical field [0001] The invention belongs to the field of thermal physical property testing devices, and relates to a thermal physical parameter testing device of rock and soil, in particular to an integrated device for testing thermal physical property parameters of in-situ rock and soil mass. Background technique [0002] With the rapid development of the economy, the vigorous use of traditional energy sources such as coal and oil has led to a rapid increase in energy consumption on the one hand and worsened environmental evolution on the other hand. Therefore, it is an inevitable trend to develop a new energy source, and geothermal energy has the advantages of cleanness, high efficiency, renewable, and huge reserves. However, the technical equipment for in-situ exploration of shallow geothermal energy in rock and soil is relatively limited and immature. Most of them are tested in laboratories. The few that can be tested in situ are generally drilled with penetrators fi...

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Problems solved by technology

However, the technical equipment for in-situ exploration of shallow geothermal energy in rock and soil is relatively limited and immature. Most of them are tested in laboratories. The few that can be tested in situ are generally drilled with penetrators first. Then test the thermal physical parameters, but this will lead to in-situ soil disturbance and moisture changes, and the test data cannot reflect the real situation. At the same time, there is little data on the thermal physical properties of rock and soil, and most of them only get thermal conductivity. For in-depth research on rock and soil The thermophysical properties of soil and the change of ground temperature have certain limitations

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