Rock-soil thermal response test device and intelligent data processing method

Abstract

The invention belongs to the technical field of rock-soil thermal response tests, and discloses a rock-soil thermal response test device and an intelligent data processing method.The rock-soil thermal response test device comprises a buried pipe water circulation system and a data acquisition and control system; the buried pipe water circulation system comprises a double-U-shaped buried pipe, a heating box, a water tank and a circulating water pump and is used for providing power for water circulation in the double-U-shaped buried pipe and heating circulating water according to set power. The data acquisition and control system comprises a plurality of data acquisition units, a temperature measuring line, a controller, a gateway, an antenna and a touch screen, and is used for acquiring real-time data of each monitoring point in the test process, uploading test data to the cloud platform and controlling start and stop and power adjustment of the circulating water pump and the heating box; and data processing software preset in the cloud platform can perform analysis processing, parameter calculation and result output on test data after the test, so that intelligent processing of the test data is realized, and the efficiency of obtaining the result of the rock-soil thermal response test is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geotechnical thermal response test, in particular to a geotechnical thermal response test device and an intelligent data processing method. BACKGROUND

[0002] In recent years, the ground source heat pump system is more widely used in engineering. Because the heat transfer performance of double U-shaped ground heat exchanger is better than that of single U-shaped ground heat exchanger, double U-shaped ground heat exchanger is widely used in engineering. Through the geotechnical thermal response test of double U-shaped ground heat exchanger, the initial temperature of soil at different depths is measured, the circulating water quantity, heating power and inlet and outlet water temperature of ground heat exchanger are monitored, and the data is calculated and analyzed, so that the initial average temperature of geotechnical, comprehensive thermal conductivity of geotechnical, comprehensive specific heat capacity of geotechnical, reference value of heat exchange of ground heat exchanger under test condition and reference value of heat exchange of ground heat exchanger under given design condition can be obtained, which provides an important reference for the design of ground source heat pump system.

[0003] The recommended duration of geotechnical thermal response test is 50h or 60h, and the minimum cannot be lower than 48h. However, in the current geotechnical thermal response test process, the start and stop of the heater and the circulating water pump, the adjustment of the circulating flow and the heating power need to be operated by the staff on site, and cannot be remotely controlled. In addition, the processing and analysis of test data and the calculation of results after the test also need manual operation, which consumes a lot of manpower.

[0004] In view of the above problems, the present application provides a geotechnical thermal response test device and an intelligent data processing method. The test device can be remotely controlled through the cloud platform, and the test data can be uploaded to the cloud platform. The data processing software preset in the cloud platform can automatically process and calculate the test data after the test is completed. SUMMARY

[0005] The present application aims to provide a geotechnical thermal response test device and an intelligent data processing method to solve the problems of the existing geotechnical thermal response test device that cannot be remotely monitored and controlled and the lack of intelligent data processing.

[0006] The technical scheme of the present application is as follows:

[0007] A geotechnical thermal response test device, characterized in that it comprises a ground heat exchanger water circulation system and a data acquisition and control system.

[0008] The ground pipe water circulation system comprises a double U-shaped ground pipe 27, a heating tank 2, a water tank 14 and a circulating water pump 1. The double U-shaped ground pipe 27 is arranged in a drill hole 28 and comprises a U-shaped ground pipe 125 and a U-shaped ground pipe 226 connected in parallel through a water inlet three-way joint 23 and a water outlet three-way joint 24. A single port end of the water inlet three-way joint 23 is connected to the other end of a water inlet joint 21 at a water inlet 39 through a pipeline, and double port ends of the water inlet three-way joint 23 are respectively connected to inlets of the U-shaped ground pipe 125 and the U-shaped ground pipe 226. A single port end of the water outlet three-way joint 24 is connected to one end of a water outlet joint 22 at a water outlet through a pipeline, and double port ends of the water outlet three-way joint 24 are respectively connected to outlets of the U-shaped ground pipe 125 and the U-shaped ground pipe 226. An inlet of the heating tank 2 is connected to the other end of the water outlet joint 22 at a water outlet 40 through a pipeline, and an outlet of the heating tank 2 is connected to an inlet of the circulating water pump 1 to heat circulating water. The water tank 14 is connected between the outlet of the heating tank 2 and the inlet of the circulating water pump 1 through a pipeline, and a water level of the water tank 14 is higher than that of the water outlet pipeline. An outlet of the circulating water pump 1 is connected to the other end of the water inlet joint 21 to pump water from the water tank 14 and the heating tank 2 into the double U-shaped ground pipe 27.

[0009] The data acquisition and control system comprises several data collectors, temperature measuring line 31, controller 15, gateway 16, antenna 17 and touch screen 20; the several data collectors comprise voltage sensor 8, current sensor 7, inlet water temperature sensor 10, flow meter 9, inlet water pressure gauge 19, return water temperature sensor 11 and return water pressure gauge 18; the voltage sensor 8 and current sensor 7 are arranged on the heating tank 2 to monitor the voltage and current during heating; the inlet water temperature sensor 10, flow meter 9 and inlet water pressure gauge 19 are arranged on the pipeline of inlet water between the circulating water pump 1 and the inlet joint 21 to monitor the temperature, pressure and flow during inlet water; the return water temperature sensor 11 and return water pressure gauge 18 are arranged on the pipeline of return water to monitor the temperature and pressure during return water; the temperature sensors 32 are arranged at equal intervals on the temperature measuring line 31, which is vertically arranged in the temperature measuring buried pipe 30, and the upper end of the temperature measuring line 31 extends out of the temperature measuring buried pipe 30 through the temperature measuring buried pipe head 33; the temperature measuring buried pipe 30 is arranged in the drilling 28; the controller 15 is connected with the heating tank 2, circulating water pump 1, temperature measuring line 31 extending out of the temperature measuring buried pipe 30, voltage sensor 8, current sensor 7, inlet water temperature sensor 10, return water temperature sensor 11, inlet water pressure gauge 19, return water pressure gauge 18 and flow meter 9 to monitor the feedback data of the heating tank 2, circulating water pump 1, temperature measuring line 31, voltage sensor 8, current sensor 7, inlet water temperature sensor 10, return water temperature sensor 11, inlet water pressure gauge 19, return water pressure gauge 18 and flow meter 9, and further control the start-stop and power of the circulating water pump 1 and heating tank 2; the gateway 16 is connected with the controller 15 to collect the data of the controller 15 in real time; the antenna 17 is connected with the gateway 16 to send the data of the gateway 16 to the cloud platform 37; the touch screen 20 is connected with the controller 15, which can directly input instructions to control the start-stop and power adjustment of the circulating water pump 1 and heating tank 2, and realize human-computer interaction.

[0010] Further, the pipeline between the inlet of the circulating water pump 1 and the return water port 40 is provided with a dirt remover 12 to remove impurities in the circulating water; the pipeline of the outlet of the circulating water pump 1 is provided with a water hammer eliminator 5 to eliminate the water hammer phenomenon when the circulating water pump 1 stops, and to protect the circulating water pump 1 and the pipeline; the pipeline between the circulating water pump 1 and the inlet port 39 is provided with an automatic exhaust valve 6 to automatically exhaust air in the pipeline; the pipeline between the water tank 14 and the circulating water pump 1 is provided with a water replenishment valve 13 to control the start-stop of water replenishment.

[0011] Further, the heating tank 2 is composed of independent electric heater 13 and electric heater 24, the electric heater 13 is a 5kW constant heating power, the electric heater 24 is connected with the automatic pressure regulator 38, the heating power is adjustable from 0 to 5kW, and the heating tank 2 can realize stepless adjustment from 0 to 10kW through the control of the controller 15.

[0012] Furthermore, the cloud platform 37 can monitor and control the operating status of the geotechnical thermal response test device in real time.

[0013] Furthermore, the unit housing 34 is provided with a layered partition 35 inside, which separates the heating box 2, water tank 14 and circulating water pump 1 in the lower layer inside the unit housing 34, and the controller 15, gateway 16 and antenna 17 are placed in the upper layer inside the unit housing 34. Lockable wheels 36 are installed at the bottom of the unit housing 34 to facilitate the movement and fixation of the device.

[0014] Furthermore, the return water pressure gauge 18 and the inlet water pressure gauge 19 are embedded in the unit casing 34 to facilitate data reading and monitoring of the operating status of the geotechnical thermal response test monitoring device.

[0015] Furthermore, the space between the double U-shaped buried pipe 27 and the temperature measuring buried pipe 30 inside the drilling well 28 is filled with drilling backfill material 29.

[0016] A method for intelligent processing of thermal response test data in soil and rock, characterized in that it is implemented using a thermal response test apparatus for soil and rock as described in any one of claims 1-8, and specifically includes the following steps:

[0017] Step 1: The cloud platform receives and stores the test data transmitted by the controller;

[0018] Step 2: After the experiment, the cloud platform analyzes and processes the experimental data to calculate the initial temperature T of the soil and rock. 0 ∞ Soil overall thermal conductivity λ s Soil thermal diffusivity α s Specific heat capacity of soil by volume ρ s c s The calculation method is as follows:

[0019] 1) Initial data filtering:

[0020]

[0021] In the formula, Z represents the error control coefficient; r b Let τ be the borehole radius, in meters. Test data after time τ are valid and will be used in subsequent calculations. Test data before time τ (including time τ) will be discarded.

[0022] 2) Calculate the initial temperature T of the soil and rock. 0 ∞ :

[0023]

[0024] In the formula, N is the number of temperature sensors on the temperature measuring line; T iThe soil temperature measured by each temperature sensor at different depths, ℃

[0025] 3) Calculate the average temperature T of the fluid in the double-U-shaped ground heat exchanger f :

[0026]

[0027] where T in is the inlet water temperature of the double-U-shaped ground heat exchanger measured by the inlet water temperature sensor, ℃; T out is the return water temperature of the double-U-shaped ground heat exchanger measured by the return water temperature sensor, ℃;

[0028] 4) Calculate the heat release rate q of the double-U-shaped ground heat exchanger per unit length l :

[0029]

[0030] where Q is the heating power of the heating box, W; H is the drilling depth, m;

[0031] 5) Calculate the comprehensive thermal conductivity λ of the soil s :

[0032] According to the effective data, a fitting straight line of the average temperature of the fluid in the double-U-shaped ground heat exchanger and the natural logarithm of the heating time of the heating box is made, and the slope k and the intercept m of the fitting straight line are obtained; the comprehensive thermal conductivity of the soil is calculated by using the slope k of the fitting straight line:

[0033]

[0034] 6) Calculate the borehole thermal resistance R b :

[0035]

[0036] where d i is the inner diameter of the double-U-shaped ground heat exchanger, m; d o is the outer diameter of the double-U-shaped ground heat exchanger, m; d b is the drilling diameter, m; D is the center distance of the double-U-shaped ground heat exchanger, m; λ p is the thermal conductivity of the double-U-shaped ground heat exchanger, W / (m·K); λ b is the thermal conductivity of the drilling backfill material, W / (m·K); h is the convective heat transfer coefficient between the circulating water and the inner wall of the double-U-shaped ground heat exchanger, W / (m 2 ·K);

[0037] 7) Calculate the soil thermal diffusivity α s :

[0038]

[0039] wherein r b is the radius of the well, m; γ is the Euler constant; m is the intercept of the fitting straight line;

[0040] 8) Calculate the volumetric specific heat capacity of soil ρ s c s :

[0041]

[0042] Step three: the data processing software automatically outputs the initial temperature of rock and soil T 0 ∞ , the comprehensive thermal conductivity of soil λ s , the thermal diffusivity of soil α s , and the volumetric specific heat capacity of soil ρ s c s .

[0043] Compared with the prior art, the present application has the following benefits:

[0044] The present application can upload test data to a cloud platform in real time, and the running state of the test device can be monitored and remotely controlled through the cloud platform, so that the test personnel can not need to be on site for regulation and control, and the consumption of manpower is reduced.

[0045] The data processing software pre-installed in the cloud platform analyzes and processes test data, calculates parameters, and outputs results after the test is completed, realizes intelligent processing of test data, and greatly improves the efficiency of obtaining rock and soil thermal response test results. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0047] Figure 1 The rock and soil thermal response test device structure schematic diagram provided by the embodiments of the present application;

[0048] Figure 2 The data acquisition and control system architecture diagram provided by the embodiments of the present application;

[0049] The components represented by the numbers in the figure are listed as follows: 1-circulating water pump; 2-heating tank; 3-electric heater 1; 4-electric heater 2; 5-water hammer eliminator; 6-automatic exhaust valve; 7-current sensor; 8-voltage sensor; 9-flow meter; 10-inlet water temperature sensor; 11-return water temperature sensor; 12-purifier; 13-water replenishment valve; 14-water tank; 15-controller; 16-gateway; 17-antenna; 18-return water pressure gauge; 19-inlet water pressure gauge; 20-touch screen; 21-inlet water inlet joint; 22-return water outlet joint; 23-inlet water inlet tee joint; 24-return water outlet tee joint; 25-U-shaped buried pipe 1; 26-U-shaped buried pipe 2; 27-double U-shaped buried pipe; 28-drilling well; 29-drilling well backfill material; 30-temperature measuring buried pipe; 31-temperature measuring wire; 32-temperature sensor; 33-temperature measuring buried pipe end cap; 34-unit shell; 35-layered partition; 36-wheel; 37-cloud platform; 38-automatic pressure regulator; 39-inlet water inlet; 40-return water outlet. DETAILED DESCRIPTION

[0050] The application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] Reference Figure 1 The geotechnical thermal response test device includes a buried pipe water circulation system and a data acquisition and control system.

[0052] The buried pipe water circulation system comprises a double U-shaped buried pipe 27, a heating tank 2, a water tank 14 and a circulating water pump 1. The double U-shaped buried pipe 27 is arranged in a borehole 28 and comprises a U-shaped buried pipe 125 and a U-shaped buried pipe 226 connected in parallel through a water inlet three-way joint 23 and a water outlet three-way joint 24. A single port end of the water inlet three-way joint 23 is connected to a water inlet joint 21 at a water inlet 39 through a pipeline, and double port ends of the water inlet three-way joint 23 are connected to inlets of the U-shaped buried pipe 125 and the U-shaped buried pipe 226 respectively. A single port end of the water outlet three-way joint 24 is connected to a water outlet joint 22 at a water outlet 40 through a pipeline, and double port ends of the water outlet three-way joint 24 are connected to outlets of the U-shaped buried pipe 125 and the U-shaped buried pipe 226 respectively. An inlet of the heating tank 2 is connected to the other end of the water outlet joint 22 through a pipeline, and an outlet of the heating tank 2 is connected to an inlet of the circulating water pump 1 to heat circulating water. The water tank 14 is connected between the outlet of the heating tank 2 and the inlet of the circulating water pump 1 through a pipeline, and a water level of the water tank 14 is higher than that of the water outlet pipeline. An outlet of the circulating water pump 1 is connected to the other end of the water inlet joint to pump water in the water tank 14 and the circulating water of the heating tank 2 into the double U-shaped buried pipe 27. A decontaminator 12 is arranged on a pipeline between the inlet of the circulating water pump 1 and the water outlet 40 to remove impurities in the circulating water. A water hammer eliminator 5 is arranged on a pipeline of the outlet of the circulating water pump 1 to eliminate water hammer phenomenon when the circulating water pump 1 stops, thereby protecting the circulating water pump 1 and the pipeline. An automatic air vent valve 6 is arranged on a pipeline between the circulating water pump 1 and the water inlet 39 to automatically discharge air in the pipeline. A water supplement valve 13 is arranged on a pipeline between the water tank 14 and the circulating water pump 1 to control start and stop of water supplement. The heating tank 2 is composed of an independent electric heater 13 and an electric heater 24. The electric heater 13 has a constant heating power of 5 kW, the electric heater 24 is connected to an automatic pressure regulator 38 and has an adjustable heating power of 0-5 kW, and the heating tank 2 can realize stepless adjustment of 0-10 kW through control of a controller 15. A layered partition plate 35 is arranged inside a unit shell 34 to separate the heating tank 2, the water tank 14 and the circulating water pump 1 in a lower layer inside the device, and the controller 15, a gateway 16 and an antenna 17 are arranged in an upper layer inside the unit shell 34. Lockable wheels 36 are installed at a bottom of the unit shell 34 to facilitate movement and fixation of the device. Figure 2The data acquisition and control system comprises a plurality of data collectors, a temperature measuring line 31, a controller 15, a gateway 16, an antenna 17 and a touch screen 20. The plurality of data collectors comprises a voltage sensor 8, a current sensor 7, a water inlet temperature sensor 10, a flow meter 9, a water inlet pressure gauge 19, a water return temperature sensor 11 and a water return pressure gauge 18. The voltage sensor 8 and the current sensor 7 are arranged on the heating tank 2 to monitor the voltage and current during heating. The water inlet temperature sensor 10, the flow meter 9 and the water inlet pressure gauge 19 are arranged on the pipeline of the water inlet between the circulating water pump 1 and the water inlet joint 21 to monitor the temperature, pressure and flow during water inlet. The water return temperature sensor 11 and the water return pressure gauge 18 are arranged on the water return pipeline to monitor the temperature and pressure during water return. The temperature sensors 32 are arranged at equal intervals on the temperature measuring line 31, which is vertically arranged in the temperature measuring buried pipe 30, and the upper end of the temperature measuring line 31 extends out of the temperature measuring buried pipe 30 through the temperature measuring buried pipe head 33. The temperature measuring buried pipe 30 is arranged in the drilling 28. The controller 15 is connected with the heating tank 2, the circulating water pump 1, the temperature measuring line 31 extending out of the temperature measuring buried pipe 30, the voltage sensor 8, the current sensor 7, the water inlet temperature sensor 10, the water return temperature sensor 11, the water inlet pressure gauge 19, the water return pressure gauge 18 and the flow meter 9 to monitor the feedback data of the heating tank 2, the circulating water pump 1, the temperature measuring line 31, the voltage sensor 8, the current sensor 7, the water inlet temperature sensor 10, the water return temperature sensor 11, the water inlet pressure gauge 19, the water return pressure gauge 18 and the flow meter 9, and to further control the start-stop and power of the circulating water pump 1 and the heating tank 2. The gateway 16 is connected with the controller 15 to collect the data of the controller 15 in real time. The antenna 17 is connected with the gateway 16 to send the data of the gateway 16 to the cloud platform 37. The touch screen 20 is connected with the controller 15, and the start-stop and power adjustment of the circulating water pump 1 and the heating tank 2 can be directly inputted and controlled, so as to realize human-computer interaction.

[0053] The intelligent processing method of the geotechnical thermal response test data is realized by using the geotechnical thermal response test device, and specifically comprises the following steps:

[0054] Step one: the cloud platform receives and stores the test data transmitted by the controller;

[0055] Step two: the cloud platform analyzes and processes the test data after the test is completed, and calculates the initial temperature T 0 ∞ , the comprehensive soil thermal conductivity λ s , the soil thermal diffusivity α s and the soil volumetric specific heat capacity ρ s c s , and the calculation method is as follows:

[0056] 1) initial data screening:

[0057]

[0058] wherein Z represents an error control coefficient; r b is the borehole radius, m;

[0059] The test data after the time τ are effective data, which are involved in the subsequent calculation process, and the test data before the time τ (including the time τ) are excluded;

[0060] 2) Calculate the initial temperature T 0 ∞ :

[0061]

[0062] wherein N is the number of temperature sensors on the temperature measuring line; T i is the soil temperature at different depths measured by each temperature sensor, ℃;

[0063] 3) Calculate the average temperature T f :

[0064]

[0065] wherein T in is the inlet water temperature of the double U-shaped buried pipe measured by the inlet water temperature sensor, ℃; T out is the return water temperature of the double U-shaped buried pipe measured by the return water temperature sensor, ℃;

[0066] 4) Calculate the heat flow q released by the unit length of the double U-shaped buried pipe l :

[0067]

[0068] wherein Q is the heating power of the heating box, W; H is the drilling depth, m;

[0069] 5) Calculate the comprehensive thermal conductivity λ of the soil s :

[0070] According to the effective data, a fitting straight line of the average temperature of the fluid in the double U-shaped buried pipe and the natural logarithm of the heating time of the heating box is made, the slope k and the intercept m of the fitting straight line are obtained, and the comprehensive thermal conductivity of the soil is calculated by using the slope k of the fitting straight line:

[0071]

[0072] 6) Calculate the borehole thermal resistance R b :

[0073]

[0074] wherein di D is the diameter of the borehole, m; D is the center distance of the double U-shaped ground heat exchanger, m; λ o D is the diameter of the borehole, m; D is the center distance of the double U-shaped ground heat exchanger, m; λ b D is the diameter of the borehole, m; D is the center distance of the double U-shaped ground heat exchanger, m; λ p D is the diameter of the borehole, m; D is the center distance of the double U-shaped ground heat exchanger, m; λ b D is the diameter of the borehole, m; D is the center distance of the double U-shaped ground heat exchanger, m; λ 2 D is the diameter of the borehole, m; D is the center distance of the double U-shaped ground heat exchanger, m; λ

[0075] 7) Calculate the soil thermal diffusivity α s :

[0076]

[0077] In the formula, r b D is the diameter of the borehole, m; D is the center distance of the double U-shaped ground heat exchanger, m; λ

[0078] 8) Calculate the soil volumetric specific heat capacity ρ s c s :

[0079]

[0080] Step three: The data processing software automatically outputs the initial temperature T 0 ∞ , the soil comprehensive thermal conductivity λ s , the soil thermal diffusivity α s and the soil volumetric specific heat capacity ρ s c s calculated results.

[0081] The above embodiments only illustrate the technical concept and characteristics of the present application, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A geotechnical thermal response test apparatus, characterized by, The buried pipe water circulation system and a data acquisition and control system are included. The buried pipe water circulation system includes a double U-shaped buried pipe (27), a heating tank (2), a water tank (14) and a circulating water pump (1). The double U-shaped buried pipe (27) is arranged in a drill hole (28) and is composed of U-shaped buried pipe 1 (25) and U-shaped buried pipe 2 (26) connected in parallel through a water inlet three-way joint (23) and a water outlet three-way joint (24). The single-port end of the water inlet three-way joint (23) is connected to one end of a water inlet joint (21) at a water inlet (39) through a pipeline, and the double-port end of the water inlet three-way joint (23) is connected to the inlets of the U-shaped buried pipe 1 (25) and the U-shaped buried pipe 2 (26) respectively. The single-port end of the water outlet three-way joint (24) is connected to one end of a water outlet joint (22) at a water outlet (40) through a pipeline, and the double-port end of the water outlet three-way joint (24) is connected to the outlets of the U-shaped buried pipe 1 (25) and the U-shaped buried pipe 2 (26) respectively. The inlet of the heating tank (2) is connected to the other end of the water outlet joint (22) through a pipeline, and the outlet of the heating tank (2) is connected to the inlet of the circulating water pump (1) to heat the circulating water. The water tank (14) is connected between the outlet of the heating tank (2) and the inlet of the circulating water pump (1) through a pipeline, and the water level of the water tank (14) is higher than that of the water outlet pipeline. The outlet of the circulating water pump (1) is connected to the other end of the water inlet joint (21) to pump the water supplement of the water tank (14) and the circulating water of the heating tank (2) into the double U-shaped buried pipe (27). The data acquisition and control system comprises a plurality of data collectors, temperature measuring lines (31), a controller (15), a gateway (16), an antenna (17) and a touch screen (20); the plurality of data collectors comprise voltage sensors (8), current sensors (7), water inlet temperature sensors (10), flow meters (9), water inlet pressure gauges (19), water return temperature sensors (11) and water return pressure gauges (18); the voltage sensors (8) and the current sensors (7) are arranged on the heating box (2) to monitor the voltage and the current during heating; the water inlet temperature sensors (10), the flow meters (9) and the water inlet pressure gauges (19) are arranged on the pipeline of the water inlet between the circulating water pump (1) and the water inlet joint (21) to monitor the temperature, the pressure and the flow during water inlet; the water return temperature sensors (11) and the water return pressure gauges (18) are arranged on the pipeline of the water return to monitor the temperature and the pressure during water return; the temperature measuring lines (31) are vertically arranged in the temperature measuring buried pipes (30) and are provided with temperature sensors (32) at equal intervals; the upper ends of the temperature measuring lines (31) extend out of the temperature measuring buried pipes (30) through the temperature measuring buried pipe sealing heads (33); the temperature measuring buried pipes (30) are arranged in the drilling wells (28); the controller (15) is connected with the heating box (2), the circulating water pump (1), the one end of the temperature measuring line (31) extending out of the temperature measuring buried pipe (30), the voltage sensors (8), the current sensors (7), the water inlet temperature sensors (10), the water return temperature sensors (11), the water inlet pressure gauges (19), the water return pressure gauges (18) and the flow meters (9) to monitor the feedback data of the heating box (2), the circulating water pump (1), the temperature measuring line (31), the voltage sensors (8), the current sensors (7), the water inlet temperature sensors (10), the water return temperature sensors (11), the water inlet pressure gauges (19), the water return pressure gauges (18) and the flow meters (9) and to further control the start and stop and the power of the circulating water pump (1) and the heating box (2); the gateway (16) is connected with the controller (15) to collect the data of the controller (15) in real time; the antenna (17) is connected with the gateway (16) to send the data of the gateway (16) to the cloud platform (37); the touch screen (20) is connected with the controller (15) and can directly input instructions to control the start and stop and the power adjustment of the circulating water pump (1) and the heating box (2) to realize man-machine interaction.

2. The geotechnical thermal response test apparatus of claim 1, wherein, The pipeline between the inlet and the water return port (40) of the circulating water pump (1) is provided with a dirt remover (12) to remove impurities in the circulating water; the pipeline of the outlet of the circulating water pump (1) is provided with a water hammer eliminator (5) to eliminate the water hammer phenomenon when the circulating water pump (1) stops and to protect the circulating water pump (1) and the pipeline; the pipeline between the circulating water pump (1) and the water inlet (39) is provided with an automatic exhaust valve (6) to automatically exhaust air in the pipeline; the pipeline between the water tank (14) and the circulating water pump (1) is provided with a water supplement valve (13) to control the start and stop of water supplement.

3. The geotechnical thermal response test apparatus of claim 1, wherein, The heating tank (2) is composed of independent electric heater 1 (3) and electric heater 2 (4), the electric heater 1 (3) is 5kW constant heating power, the electric heater 2 (4) is connected with automatic pressure regulator (38), the heating power is 0-5kW adjustable, the heating tank (2) is controlled by the controller (15) and can realize 0-10kW stepless regulation of the heating tank.

4. The geotechnical thermal response test apparatus of claim 1, wherein, The cloud platform (37) can monitor and control the operation state of the geotechnical thermal response test device in real time.

5. The geotechnical thermal response test apparatus of claim 1, wherein, The machine set shell (34) is internally provided with layered partition plates (35), which separate the heating tank (2), the water tank (14) and the circulating water pump (1) in the lower layer inside the machine set shell (34), the controller (15), the gateway (16) and the antenna (17) are arranged in the upper layer inside the machine set shell (34), and the bottom of the machine set shell (34) is provided with lockable wheels (36), so as to facilitate the movement and fixation of the device.

6. The geotechnical thermal response test apparatus of claim 5, wherein, The return water pressure gauge (18) and the water inlet pressure gauge (19) are embedded on the machine set shell (34) to facilitate reading data and monitoring the operation state of the geotechnical thermal response test device.

7. The geotechnical thermal response test apparatus of claim 1, wherein, The drilling backfill material (29) is filled between the double U-shaped buried pipe (27) and the temperature measuring buried pipe (30) in the drilling (28). 8.The intelligent data processing method for geotechnical thermal response test according to claim 1, characterized in that, The cloud platform (37) is preinstalled with data processing software, which is used for analyzing and processing test data, calculating parameters and outputting results after the test is completed.

9. A geotechnical thermal response test data intelligent processing method, characterized in that, The geotechnical thermal response test device of any one of claims 1-8 is adopted, and the specific steps include the following: Step one: the cloud platform receives and stores the test data transmitted by the controller; Step two: the cloud platform analyzes and processes the test data after the test is completed, calculates the initial temperature T of the rock-soil 0 ∞ The comprehensive soil thermal conductivity λ s The soil thermal diffusivity α s And the volumetric specific heat capacity of soil ρ s c s The calculation method is as follows: 1) initial data screening: Let In the formula, Z represents an error control coefficient; r b is the drilling radius; the test data after the moment τ is effective data, which participates in the subsequent calculation process, and the test data before the moment τ is screened out. 2) Calculate the initial temperature of the ground T 0 ∞ : In the formula, N is the number of temperature sensors on the temperature measuring line; T i is the soil temperature at different depths measured by each temperature sensor; 3) Calculate the average temperature of the fluid in the double U- shaped ground heat exchanger T f : In the formula, T in is the inlet water temperature of the double U-shaped ground heat exchanger measured by the inlet water temperature sensor; T out is the return water temperature of the double U-shaped ground heat exchanger measured by the return water temperature sensor; 4) Calculating the heat flow rate q released by a double U- shaped buried pipe per unit length l : In the formula, Q is the heating power of the heating tank; H is the drilling depth; 5) Calculate the overall thermal conductivity of the soil λ s : According to the effective data, the fitting straight line of the average temperature of the fluid in the double U-shaped buried pipe and the natural logarithm of the heating time of the heating tank is calculated, the slope k and the intercept m of the fitting straight line are obtained, and the comprehensive thermal conductivity of the soil is calculated by using the slope k of the fitting straight line: 6) Calculate the bore thermal resistance R b : wherein d i is the inner diameter of the double U-shaped ground heat exchanger; d o is the outer diameter of the double U-shaped ground heat exchanger; d b is the diameter of the borehole; D is the center distance of the double U-shaped ground heat exchanger; λ p is the thermal conductivity of the wall of the double U-shaped ground heat exchanger; λ b is the thermal conductivity of the backfill material of the borehole; h is the convective heat transfer coefficient between the circulating water and the inner wall of the double U-shaped ground heat exchanger; 7) Calculate the soil thermal diffusivity a s : where r b is the radius of the well; γ is Euler's constant; and m is the intercept of the fitted straight line. 8) Calculate the volumetric heat capacity of the soil p s c s : Step three: The data processing software automatically outputs the initial temperature of the rock-soil T 0 ∞ The integrated thermal conductivity of the soil λ s The thermal diffusivity of the soil α s The volumetric specific heat capacity of the soil ρ s c s Calculation results.

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