Transparent soil model test device and test method capable of superposing underground energy wall

Abstract

The invention discloses a superposable underground energy wall transparent soil model test device and a test method, belongs to the technical field of underground energy wall test models, and solves the problems of insufficient monitoring data accuracy and incapability of visualization in a research test of an underground energy wall. The system specifically comprises an underground energy wall model system, a cold and hot cyclic load system and an image acquisition system. The cold and hot cyclic load system is connected with the underground energy wall model system and applies a cold and hot cyclic load to the underground energy wall model system; and the image acquisition system monitors the thermal response of the underground energy wall model system under the cold and hot cyclic load. According to the invention, the cold and hot cyclic load system provides a cold and hot cyclic load for the underground energy wall model system so as to test the thermal response of the underground energy wall model system under the cold and hot cyclic load; the image acquisition system can monitor and record changes of the underground energy wall model system in real time in the testing process, and reference is provided for research results of the underground energy wall.

Description

Technical Field

[0001] The invention relates to the technical field of underground energy wall test models, and in particular to a test device and a test method for a superimposable underground energy wall transparent soil model. Background Art

[0002] As the demand for sustainable energy solutions grows, geothermal energy, as an efficient and clean energy source, has been increasingly widely used. The energy underground structure mainly extracts shallow geothermal energy, where the underground energy wall combines the underground continuous wall with the heat exchange pipes of the ground source heat pump system, making it have the dual functions of bearing external loads and extracting shallow geothermal energy.

[0003] However, it is difficult to directly observe the deformation of the energy wall-soil in the current thermodynamic model test of the traditional underground energy wall, and the temperature monitoring of the energy wall-soil under the cold and hot cycle load cannot meet the data accuracy requirements. The wall depth is a significant influencing factor in the study of the heat transfer performance of the underground energy wall, but it is difficult for the traditional model to achieve flexible changes in the wall depth. Therefore, in order to solve the limitations of the traditional model test in visualization research, it is urgent to propose a superimposable underground energy wall transparent soil model test device and test method. By using transparent soil technology, transparent soil is used instead of traditional soil for model testing to achieve real-time monitoring and visualization of the test process. At the same time, the superimposability of the underground energy wall model improves the operability and economy of the test. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a test device and test method for a transparent soil model of a superimposable underground energy wall, which solves the problems of insufficient accuracy of monitoring data and inability to visualize the test process in research and testing of underground energy walls.

[0005] In the first aspect, in order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is:

[0006] A superimposable underground energy wall transparent soil model test device comprises an underground energy wall model system, a cold and hot cycle load system and an image acquisition system; the cold and hot cycle load system is connected to the underground energy wall model system to apply the cold and hot cycle load to the underground energy wall model system; the image acquisition system monitors the thermal response of the underground energy wall model system under the cold and hot cycle load.

[0007] In this scheme, the hot and cold cycle load system provides hot and cold cycle loads for the underground energy wall model system to test its thermal response under the hot and cold cycle loads; the image acquisition system can monitor and record the changes of the underground energy wall model system during the test in real time, providing a reference for the research results of the underground energy wall.

[0008] Furthermore, the underground energy wall model system includes a transparent soil model box, which is filled with sandy transparent soil; an underground energy wall is buried in the sandy transparent soil; the underground energy wall includes an aluminum alloy hollow cuboid, which is buried in the sandy transparent soil; a water inlet is provided on one side of the aluminum alloy hollow cuboid, and a water outlet is provided on the other side of the aluminum alloy hollow cuboid; a circulation channel with an S-shaped structure is provided inside the aluminum alloy hollow cuboid, and both ends of the circulation channel are respectively connected to the water inlet and the water outlet; a hot and cold circulation load system is connected to the water inlet and the water outlet.

[0009] In this scheme, sandy transparent soil is filled inside the transparent soil model box to simulate the actual soil, and an underground energy wall is buried inside the sandy transparent soil. Hot and cold cycle loads are applied to the underground energy wall through the hot and cold cycle load system to monitor the changes of the sandy transparent soil and the underground energy wall, thereby realizing the visualization of the underground energy wall research.

[0010] Furthermore, the hot and cold cycle load system includes a water tank, which is connected to a water inlet pipe and a water outlet pipe; the water inlet pipe is provided with a self-priming pump and a flow meter; the end of the water inlet pipe away from the water tank is connected to the water inlet, and the end of the water outlet pipe away from the water tank is connected to the water outlet; an electric heating rod is provided in the water tank; the water tank is connected to the refrigerator through a refrigeration pipeline.

[0011] In this scheme, the self-priming pump changes the flow rate of the heat exchange fluid by changing the water pressure, and the flow meter is used to measure the fluid flow rate flowing through the water inlet pipe per unit time; the self-priming pump drives the heat exchange fluid in the water tank into the underground energy wall through the water inlet pipe, and then flows back to the water tank through the water outlet pipe to achieve heat exchange with the underground energy wall; the electric heating rod and the refrigerator are both used to control the temperature of the heat exchange fluid inside the water tank, which is convenient for precise control of the cold and hot loads on the underground energy wall.

[0012] Furthermore, the image acquisition system includes an infrared thermal imager, a beam laser device and a CCD industrial camera; the infrared thermal imager and the CCD industrial camera are both arranged on the side of the transparent soil model box; and the output light path of the beam laser device irradiates the transparent soil model box.

[0013] In this scheme, the infrared thermal imager is used to monitor the temperature changes of the sandy transparent soil and the underground energy wall; the beam laser device irradiates the sandy transparent soil to produce a speckle field, and the speckle field displayed on the sandy transparent soil can clearly show the displacement changes of the sandy transparent soil and the underground energy wall; the CCD industrial camera records the changes of the speckle field according to the set time interval, which is convenient for subsequent research on the displacement of the sandy transparent soil.

[0014] Furthermore, the underground energy wall includes a plurality of aluminum alloy hollow cuboids; a slot is provided at the bottom of each aluminum alloy hollow cuboid, and the plurality of aluminum alloy hollow cuboids are stacked in sequence through the slot; after stacking, the water inlet and the water outlet of two adjacent aluminum alloy hollow cuboids are connected, the water inlet of the aluminum alloy hollow cuboid at the top position is connected to the water inlet pipe, and the water outlet of the aluminum alloy hollow cuboid at the bottom position is connected to the water outlet pipe.

[0015] In this scheme, a number of aluminum alloy hollow cuboids are provided, and the wall depth of the underground energy wall is changed by stacking different numbers of aluminum alloy hollow cuboids; so as to be suitable for test models of various magnitudes.

[0016] In a second aspect, the present invention provides a method for testing a transparent soil model of a superimposable underground energy wall based on a test device for a transparent soil model of a superimposable underground energy wall provided in the first aspect, comprising the following steps:

[0017] S1: Prepare sandy transparent soil, and place the sandy transparent soil and underground energy wall into a transparent soil model box;

[0018] S2: Install the image acquisition system on the side of the transparent soil model box;

[0019] S3: Start the self-priming pump, which drives the heat exchange fluid in the water tank to flow through the underground energy wall, applying a cold and hot cycle load to the underground energy wall;

[0020] S4: The image acquisition system collects the thermal response of the underground energy wall and sandy transparent soil under the action of thermal cycling loads.

[0021] In this scheme, a self-priming pump is used to drive the heat exchange fluid in the water tank to circulate inside the underground energy wall to explore the thermal response and displacement change law of sandy transparent soil and underground energy wall under hot and cold cycle loads, and record them through an image acquisition system to provide reference for related model test research on underground energy walls.

[0022] Furthermore, S1 includes:

[0023] S101: adding a pore liquid having the same refractive index as the quartz sand to the quartz sand, stirring and mixing the mixture evenly to obtain sandy transparent soil;

[0024] S102: injecting sandy transparent soil into the transparent soil model box, and stopping the injection when the height of the sandy transparent soil is half of the height of the transparent soil model box;

[0025] S103: placing an underground energy wall into the transparent soil model box, and connecting the underground energy wall to a water inlet pipe and a water outlet pipe;

[0026] S104: Continue to inject sandy transparent soil on the top of the underground energy wall until the sandy transparent soil completely buries the underground energy wall.

[0027] In this scheme, when injecting sandy transparent soil into the transparent soil model box, a part of the sandy transparent soil is injected first and then the underground energy wall is placed, and then the sandy transparent soil is continued to be injected on the top of the underground energy wall. This method can ensure that the underground energy wall is completely buried in the sandy transparent soil, and the sandy transparent soil around the underground energy wall is evenly distributed, which provides a guarantee for the subsequent study of the displacement of the speckle field and also improves the accuracy of the test results.

[0028] Furthermore, in S2, the positions of the infrared thermal imager, the beam laser device and the CCD industrial camera are all adjusted to a position half the height of the transparent soil model box.

[0029] Furthermore, in S3, the self-priming pump drives the heat exchange fluid in the water tank to flow into the underground energy wall through the water inlet pipe, and then flows back to the water tank through the water outlet pipe; wherein the flow rate of the heat exchange fluid is 0.2m / s to 1.2m / s.

[0030] Furthermore, in S4, an infrared thermal imager is used to monitor the temperature changes of the sandy transparent soil and the underground energy wall in the transparent soil model box; a beam laser device is used to irradiate the sandy transparent soil in the transparent soil model box to form a transparent soil speckle field; and a CCD industrial camera is used to record the displacement and deformation of the sandy transparent soil.

[0031] The beneficial effects of the present invention are:

[0032] In the stackable underground energy wall transparent soil model test device provided by the present invention, multiple aluminum alloy hollow rectangular modules are used to simulate the underground energy wall. The wall depth of the continuous wall is changed by changing the number of stacked modules to explore the thermal response of the underground energy wall at different wall depths, improve the test operability, and simplify the test steps; the visualization of the thermal response study of the underground energy wall is realized, and the thermal characteristics research test device of the underground energy wall is optimized. In the hot and cold cycle load system, a refrigerator and an electric heating rod are used to adjust the temperature of the heat exchange fluid in the water tank, and a self-priming pump is used to change the flow rate of the heat exchange fluid to explore the thermal response of the underground energy wall at different temperatures and different flow rates, so as to provide reference for the relevant model test research and research of the underground energy wall.

[0033] In the superimposable underground energy wall transparent soil model test method provided by the present invention, an infrared thermal imager is used to monitor the temperature changes of the sandy transparent soil and the underground energy wall; a beam laser device irradiates the sandy transparent soil to generate a speckle field, and the speckle field displayed on the sandy transparent soil can clearly show the displacement changes of the sandy transparent soil and the underground energy wall; a CCD industrial camera records the changes of the speckle field according to a set time interval, which is convenient for subsequent research on the displacement of the sandy transparent soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of a transparent soil model test device capable of stacking underground energy walls according to the present invention;

[0035] Figure 2 A schematic diagram of the structure of an underground energy wall composed of a single aluminum alloy hollow cuboid;

[0036] Figure 3 It is a schematic diagram of the structure of an underground energy wall composed of multiple aluminum alloy hollow cuboids;

[0037] Figure 4 This is a schematic diagram of the cross-sectional structure of an underground energy wall composed of multiple aluminum alloy hollow cuboids.

[0038] Reference numerals:

[0039] 1. Underground energy wall model system; 101. Aluminum alloy hollow cuboid; 1011. Water inlet; 1012. Water outlet; 1013. Circulation channel; 1014. Card slot; 102. Underground energy wall; 103. Transparent soil model box; 2. Hot and cold cycle load system; 201. Refrigerator; 202. Electric heating rod; 203. Self-priming pump; 204. Flow meter; 2061. Water inlet pipe; 2062. Water outlet pipe; 205. Water tank; 3. Image acquisition system; 301. Infrared thermal imager; 302. Beam laser device; 303. CCD industrial camera; DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. The specific implementation of the present invention is described below to facilitate the understanding of the present invention by those skilled in the art, but it should be clear that the present invention is not limited to the scope of the specific implementation. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the attached claims, these changes are obvious, and all inventions and creations using the concept of the present invention are protected.

[0041] Example 1

[0042] like Figure 1 As shown, this embodiment provides a transparent soil model test device for superimposed underground energy wall, which uses sandy transparent soil to simulate the actual soil, and buries the underground energy wall in the sandy transparent soil, thereby realizing the visualization of the thermal response study of the underground energy wall; it specifically includes:

[0043] Underground energy wall model system 1, hot and cold cycle load system 2 and image acquisition system 3;

[0044] Among them, the hot and cold cycle load system 2 is connected to the underground energy wall model system 1, and hot and cold cycle loads are applied to the underground energy wall model system 1 to test its thermal response under the hot and cold cycle loads; the image acquisition system 3 monitors the thermal response of the underground energy wall model system 1 under the hot and cold cycle loads to provide a reference for the research results of the underground energy wall 102.

[0045] The underground energy wall model system 1 includes sandy transparent soil, an underground energy wall 102 and a transparent soil model box 103; the transparent soil model box 103 is filled with sandy transparent soil; and the underground energy wall 102 is buried in the sandy transparent soil.

[0046] like Figure 2 As shown, the underground energy wall 102 includes an aluminum alloy hollow cuboid 101, which is buried in sandy transparent soil; a water inlet 1011 is provided on one side of the aluminum alloy hollow cuboid 101, and a water outlet 1012 is provided on the other side of the aluminum alloy hollow cuboid 101; a circulation channel 1013 with an S-shaped structure is provided inside the aluminum alloy hollow cuboid 101, and both ends of the circulation channel 1013 are respectively connected to the water inlet 1011 and the water outlet 1012; a cold and hot cycle load system 2 is connected to the water inlet 1011 and the water outlet 1012.

[0047] The hot and cold cycle load system 2 includes a water tank 205, to which a water inlet pipe 2061 and a water outlet pipe 2062 are connected; the water inlet pipe 2061 is provided with a self-priming pump 203 and a flow meter 204; the end of the water inlet pipe 2061 away from the water tank 205 is connected to the water inlet 1011, and the end of the water outlet pipe 2062 away from the water tank 205 is connected to the water outlet 1012; an electric heating rod 202 is provided in the water tank 205; the water tank 205 is connected to the refrigerator 201 through a refrigeration pipeline. The self-priming pump 203 changes the flow rate of the heat exchange fluid by changing the water pressure, and the flow meter 204 is used to measure the fluid flow rate flowing through the water inlet pipe 2061 per unit time; the self-priming pump 203 drives the heat exchange fluid in the water tank 205 to enter the underground energy wall 102 through the water inlet pipe 2061, and then flows back to the water tank 205 through the water outlet pipe 2062 to achieve heat exchange with the underground energy wall 102; the electric heating rod 202 and the refrigerator 201 are both used to control the temperature of the heat exchange fluid inside the water tank 205, which is convenient for accurately controlling the cold and hot loads on the underground energy wall 102.

[0048] The image acquisition system 3 includes an infrared thermal imager 301, a beam laser device 302 and a CCD industrial camera 303; the infrared thermal imager 301 and the CCD industrial camera 303 are both installed on the side of the transparent soil model box 103 through a camera bracket; the output light path of the beam laser device 302 irradiates the transparent soil model box 103; the infrared thermal imager 301 is used to monitor the temperature changes of the sandy transparent soil and the underground energy wall 102; the beam laser device 302 irradiates the sandy transparent soil to produce a speckle field, and the speckle field displayed on the sandy transparent soil can clearly show the displacement changes of the sandy transparent soil and the underground energy wall 102; the CCD industrial camera 303 records the changes in the speckle field according to the set time interval, which is convenient for subsequent research on the displacement of the sandy transparent soil.

[0049] like Figure 3 and Figure 4 As shown, the underground energy wall 102 includes a plurality of aluminum alloy hollow cuboids 101; a slot 1014 is provided at the bottom of each aluminum alloy hollow cuboid 101, and a plurality of aluminum alloy hollow cuboids 101 are stacked in sequence through the slot 1014; after stacking, the water inlet 1011 and the water outlet 1012 of two adjacent aluminum alloy hollow cuboids 101 are connected, the water inlet 1011 of the aluminum alloy hollow cuboid 101 at the top position is connected to the water inlet pipe 2061, and the water outlet 1012 of the aluminum alloy hollow cuboid 101 at the bottom position is connected to the water outlet pipe 2062. A plurality of aluminum alloy hollow cuboids 101 are provided, and the wall depth of the underground energy wall 102 is changed by stacking different numbers of aluminum alloy hollow cuboids 101; so as to be applicable to test models of various magnitudes.

[0050] In this embodiment, the length, width and height of the transparent soil model box 103 are 350 mm, 50 mm and 380 mm respectively; the height of the sandy transparent soil in the transparent soil model box 103 is 300 mm.

[0051] The length, width and height of the aluminum alloy hollow cuboid 101 are 300 mm, 40 mm and 80 mm respectively; the water inlet 1011 or the water outlet 1012 is closed with a rubber plug, and the water inlet pipe 2061 or the water outlet pipe 2062 is inserted into the circulation channel 1013 through the rubber plug.

[0052] Example 2

[0053] This embodiment provides a transparent soil model test method for a superimposable underground energy wall 102 based on a transparent soil model test device for a superimposable underground energy wall 102 provided in Embodiment 1, comprising the following steps:

[0054] S1: Prepare sandy transparent soil, and place the sandy transparent soil and the underground energy wall 102 into the transparent soil model box 103; specifically including:

[0055] S101: adding a pore liquid having the same refractive index as the quartz sand to the quartz sand, stirring and mixing the mixture evenly to obtain sandy transparent soil;

[0056] S102: injecting sandy transparent soil into the transparent soil model box 103, and stopping the injection when the height of the sandy transparent soil is half of the height of the transparent soil model box 103;

[0057] S103: placing the underground energy wall 102 into the transparent soil model box 103, and connecting the underground energy wall 102 with the water inlet pipe 2061 and the water outlet pipe 2062;

[0058] S104: Continue to inject sandy transparent soil on the top of the underground energy wall 102 until the sandy transparent soil completely buries the underground energy wall 102; this method can ensure that the underground energy wall 102 is completely buried in the sandy transparent soil, and the sandy transparent soil around the underground energy wall 102 is evenly distributed, which provides a guarantee for the subsequent study of the displacement of the speckle field and also improves the accuracy of the test results.

[0059] S2: Installing the image acquisition system 3 on the side of the transparent soil model box 103;

[0060] In the image acquisition system 3 , the positions of the infrared thermal imager 301 , the beam laser device 302 and the CCD industrial camera 303 are all adjusted to a position half the height of the transparent soil model box 103 .

[0061] S3: Start the self-priming pump 203, which drives the heat exchange fluid in the water tank 205 to flow into the underground energy wall 102 through the water inlet pipe 2061, and then flows back to the water tank 205 through the water outlet pipe 2062; the flow rate of the heat exchange fluid is 0.2m / s to 1.2m / s.

[0062] S4: The image acquisition system 3 acquires the thermal response of the underground energy wall 102 and the sandy transparent soil under the action of the cold and hot cycle load; specifically:

[0063] The infrared thermal imager 301 is used to monitor the temperature changes of the sandy transparent soil and the underground energy wall 102 in the transparent soil model box 103; the beam laser device 302 is used to irradiate the sandy transparent soil in the transparent soil model box 103 to form a transparent soil speckle field; the CCD industrial camera 303 is used to record the displacement and deformation of the sandy transparent soil.

[0064] Those skilled in the art will appreciate that the embodiments herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical revelations disclosed by the present invention, and these variations and combinations are still within the protection scope of the invention.

Claims

1. A transparent soil model test device capable of superimposing an underground energy wall, characterized in that: The invention comprises an underground energy wall model system (1), a cold and hot cycle load system (2) and an image acquisition system (3); the cold and hot cycle load system (2) is connected to the underground energy wall model system (1) to apply a cold and hot cycle load to the underground energy wall model system (1); and the image acquisition system (3) monitors the thermal response of the underground energy wall model system (1) under the cold and hot cycle load.

2. The superimposable underground energy wall transparent soil model test device according to claim 1 is characterized in that: The underground energy wall model system (1) comprises a transparent soil model box (103), wherein the transparent soil model box (103) is filled with sandy transparent soil; an underground energy wall (102) is buried inside the sandy transparent soil; The underground energy wall (102) comprises an aluminum alloy hollow cuboid (101), and the aluminum alloy hollow cuboid (101) is buried in the sandy transparent soil; a water inlet (1011) is provided on one side of the aluminum alloy hollow cuboid (101), and a water outlet (1012) is provided on the other side of the aluminum alloy hollow cuboid (101); a circulation channel (1013) with an S-shaped structure is provided inside the aluminum alloy hollow cuboid (101), and two ends of the circulation channel (1013) are respectively connected to the water inlet (1011) and the water outlet (1012); The hot and cold cycle load system (2) is connected to the water inlet (1011) and the water outlet (1012).

3. The superimposable underground energy wall transparent soil model test device according to claim 2 is characterized in that: The hot and cold cycle load system (2) comprises a water tank (205), and the water tank (205) is connected to a water inlet pipe (2061) and a water outlet pipe (2062); the water inlet pipe (2061) is provided with a self-priming pump (203) and a flow meter (204); one end of the water inlet pipe (2061) away from the water tank (205) is connected to the water inlet (1011), and one end of the water outlet pipe (2062) away from the water tank (205) is connected to the water outlet (1012); An electric heating rod (202) is arranged in the water tank (205); the water tank (205) is connected to a refrigerator (201) via a refrigeration pipeline.

4. The superimposable underground energy wall transparent soil model test device according to claim 3 is characterized in that: The image acquisition system (3) comprises an infrared thermal imager (301), a beam laser device (302) and a CCD industrial camera (303); the infrared thermal imager (301) and the CCD industrial camera (303) are both arranged on the side of the transparent soil model box (103); and the output light path of the beam laser device (302) is irradiated on the transparent soil model box (103).

5. The superimposable underground energy wall transparent soil model test device according to claim 4 is characterized in that: The underground energy wall (102) comprises a plurality of aluminum alloy hollow cuboids (101); a slot (1014) is provided at the bottom of each aluminum alloy hollow cuboid (101), and the plurality of aluminum alloy hollow cuboids (101) are stacked in sequence through the slot (1014); after stacking, the water inlets (1011) and water outlets (1012) of two adjacent aluminum alloy hollow cuboids (101) are connected, the water inlet (1011) of the aluminum alloy hollow cuboid (101) at the top position is connected to the water inlet pipe (2061), and the water outlet (1012) of the aluminum alloy hollow cuboid (101) at the bottom position is connected to the water outlet pipe (2062).

6. A test method for the superimposable underground energy wall transparent soil model test device according to claim 5, characterized in that: The following steps are involved: S1: preparing sandy transparent soil, and placing the sandy transparent soil and the underground energy wall (102) into a transparent soil model box (103); S2: installing an image acquisition system (3) on the side of the transparent soil model box (103); S3: starting the self-priming pump (203), the self-priming pump (203) drives the heat exchange fluid in the water tank (205) to flow through the underground energy wall (102), and applies a cold and hot cycle load to the underground energy wall (102); S4: The image acquisition system (3) acquires thermal responses of the underground energy wall (102) and the sandy transparent soil under the action of the cold and hot cycle load.

7. The test method of the superimposable underground energy wall transparent soil model test device according to claim 6 is characterized in that: The S1 includes: S101: adding a pore liquid having the same refractive index as the quartz sand to the quartz sand, stirring and mixing the mixture evenly to obtain sandy transparent soil; S102: injecting sandy transparent soil into the transparent soil model box (103), and stopping the injection when the height of the sandy transparent soil is half of the height of the transparent soil model box (103); S103: placing the underground energy wall (102) into the transparent soil model box (103), and connecting the underground energy wall (102) with the water inlet pipe (2061) and the water outlet pipe (2062); S104: Continue to inject sandy transparent soil on the top of the underground energy wall (102) until the sandy transparent soil completely buries the underground energy wall (102).

8. The test method of the superimposable underground energy wall transparent soil model test device according to claim 7 is characterized by: In S2, the positions of the infrared thermal imager (301), the beam laser device (302) and the CCD industrial camera (303) are all adjusted to a position half the height of the transparent soil model box (103).

9. The test method of the superimposable underground energy wall transparent soil model test device according to claim 6 is characterized by: In S3, the self-priming pump (203) drives the heat exchange fluid in the water tank (205) to flow into the underground energy wall (102) through the water inlet pipe (2061), and then flows back to the water tank (205) through the water outlet pipe (2062); wherein the flow rate of the heat exchange fluid is 0.2 m / s to 1.2 m / s.

10. The test method of the superimposable underground energy wall transparent soil model test device according to claim 6, characterized in that: In S4, the infrared thermal imager (301) is used to monitor the temperature changes of the sandy transparent soil and the underground energy wall (102) in the transparent soil model box (103); the beam laser device (302) is used to irradiate the sandy transparent soil in the transparent soil model box (103) to form a transparent soil speckle field; and the CCD industrial camera (303) is used to record the displacement and deformation of the sandy transparent soil.

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