Multifunctional in-situ soil layer thermophysical parameter measuring device and method based on active heating optical fiber and RTK technology

Abstract

The invention discloses a multifunctional in-situ soil layer thermophysical parameter measuring device and measuring method based on an active heating optical fiber and an RTK technology, and relates to the field of soil layer parameter measurement, and the multifunctional in-situ soil layer thermophysical parameter measuring device comprises a mobile station system which comprises a cylindrical spiral drill rod, a mobile station host, a conical drill bit and a supporting force application assembly, an active heating optical fiber sensor is fixed in the cylindrical spiral drill rod; the base station system communicates with the mobile station host through wireless connection and sends observation data and observation station coordinate information; the computer display and processing system comprises an FBG (Fiber Bragg Grating) demodulator, an RTK (Real-time Kinematic) data acquisition system and data display and processing software built in a computer, and the RTK data acquisition system communicates with the mobile station host through wireless connection; and actively heating the optical fiber connection cable. The invention aims to provide the measuring device and the measuring method which can accurately position, shorten the test time, are convenient to carry, and can efficiently cover a survey area in a wider range, and technical support is provided for soil layer thermophysical property parameter survey.

Description

Technical Field

[0001] The invention relates to the field of soil layer parameter measurement, and in particular to a multifunctional in-situ soil layer thermophysical parameter measurement device and a measurement method based on active heating optical fiber and RTK technology. Background Art

[0002] Shallow geothermal energy (SGE) refers to the thermal energy stored in rock and soil, groundwater, surface water and geothermal tailwater at a depth of less than 200m. The energy mainly comes from the earth's interior and solar radiation. It has the advantages of wide distribution, huge reserves, stable and continuous, clean and environmentally friendly, and mature technology. It is very worthy of development and utilization. The development of shallow geothermal energy using technologies such as ground source heat pumps requires sufficient and accurate preliminary exploration. Therefore, accurate measurement of the thermophysical parameters of the in-situ soil layer is crucial in the shallow geothermal energy development and utilization project.

[0003] At present, the investigation of soil thermophysical parameters is divided into indoor experiments and in-situ tests, but the experimental samples are easily disturbed during sampling and transportation, so there are differences with the actual parameters; and the existing in-situ test methods, such as thermal response testing, require drilling holes and burying circulation pipes, which is time-consuming and labor-intensive, and some other thermal probes cannot meet the requirements of accurate, locatable and continuous measurement. Therefore, a multifunctional in-situ soil thermophysical parameter measurement device based on active heating optical fiber and RTK technology is designed to provide technical support for the investigation of soil thermophysical parameters. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a multifunctional in-situ soil thermal physical parameter measurement device and method based on active heating optical fiber and RTK technology, which can accurately locate, shorten the test time, be easy to carry, and can efficiently cover a wider area of ​​the survey.

[0005] The object of the present invention is to achieve the following technical solution: a multifunctional in-situ soil thermal physical parameter measurement device based on active heating optical fiber and RTK technology, comprising:

[0006] The mobile station system comprises a cylindrical spiral drill rod, a mobile station host arranged at the top of the cylindrical spiral drill rod, a conical drill bit arranged at the bottom of the cylindrical spiral drill rod, and a support force component arranged at the outer periphery of the cylindrical spiral drill rod, an active heating optical fiber sensor is fixed inside the cylindrical spiral drill rod, and the support force component is used to drive the cylindrical spiral drill rod to rotate and support the cylindrical spiral drill rod at the same time;

[0007] The base station system is fixed at the base position and communicates with the mobile station host through a wireless connection to send observation data and station coordinate information;

[0008] A computer display and processing system, including an FBG demodulator, an RTK data acquisition system and data display and processing software built into the computer. The RTK data acquisition system communicates with the mobile station host through a wireless connection. The mobile station host corrects the data information transmitted from the base station system according to the satellite signals received in real time to obtain its own precise position, and displays and stores it in the computer;

[0009] An active heating optical fiber connecting cable comprises a power supply line and a connecting optical fiber. The power supply line passes through the top of a cylindrical spiral drill rod and is electrically connected to a DC voltage-regulated power supply. The bottom of the power supply line is electrically connected to an active heating optical fiber sensor to realize power supply. The bottom of the connecting optical fiber is connected to communicate with the active heating optical fiber sensor. The connecting optical fiber passes through the top of the cylindrical spiral drill rod and is connected to communicate with an FBG demodulator, thereby displaying real-time temperature information in the computer, and using the data display and processing software to calculate the thermal physical parameters of the soil layer.

[0010] As a further technical solution, the active heating optical fiber sensor is provided with an optical fiber core, a fiber core heat-resistant protective cover, a fiber core armored metal protective cover, a heating copper mesh and an optical cable protective cover from the inside to the outside. The optical fiber core is used to measure the temperature change along the core direction and transmit the data to the FBG demodulator; the heating copper mesh is powered by a DC regulated power supply and generates heat as a resistance wire to generate heat energy; the fiber core heat-resistant protective cover is sandwiched between the optical fiber core and the heating copper mesh to form heat-resistant protection for the optical fiber core; the optical cable protective cover is wrapped in the outermost layer, i.e., the outer periphery of the heating copper mesh.

[0011] As a further technical solution, a detachable conical drill bit is installed at the bottom of the cylindrical spiral drill rod, and the conical drill bit is replaced according to different soil bodies.

[0012] As a further technical solution, a drill rod spiral blade is arranged on the outer wall of the lower part of the cylindrical spiral drill rod.

[0013] As a further technical solution, the base station system has a built-in battery and uses carrier phase observations for real-time dynamic positioning, thereby providing the three-dimensional coordinates of the measuring station in a specified coordinate system in real time in the field and achieving centimeter-level accuracy.

[0014] As a further technical solution, the mobile station host is cylindrical, includes buttons and indicator lights on the front, is provided with a network interface and a radio station at the bottom, and has a built-in battery.

[0015] As a further technical solution, the supporting force assembly includes a wrench frame fixing ring and a support frame fixing ring. A number of foldable rotating power-assisting wrench frames are arranged on the outer periphery of the wrench frame fixing ring for rotating the cylindrical spiral drill rod; a number of foldable support frames are arranged on the outer periphery of the support frame fixing ring for supporting the cylindrical spiral drill rod.

[0016] As a further technical solution, the wrench frame fixing ring and the support frame fixing ring are both connected to the outer wall of the cylindrical spiral drill rod through threads; a rubber pad is arranged on the inner circle of the support frame fixing ring, which forms a stable support structure with triangular support after being connected with the foldable support frame.

[0017] A multifunctional in-situ soil thermal physical parameter measurement method based on active heating optical fiber and RTK technology, using the above-mentioned measurement device, includes the following steps:

[0018] Step 1: Set up the base station system and complete the base station settings by debugging the host of the base station system;

[0019] Step 2, assembling the mobile station host, the cylindrical spiral drill rod and the conical drill bit;

[0020] Step 3, turn on the mobile station host, debug the configuration, connect to the base station system and receive its data;

[0021] Step 4: Turn on the computer display and processing system, connect to the base station system and the mobile station host by wireless, and debug and calibrate the RTK data acquisition system;

[0022] Step 5, connecting the DC regulated power supply and the computer display and processing system to the active heating optical fiber sensor via the active heating optical fiber connecting cable;

[0023] Step 6, turn on the DC regulated power supply to provide a constant load to the active heating optical fiber sensor, and debug and correct the optical fiber test data through the FBG demodulator of the computer display and processing system;

[0024] Step 7: After all calibrations are completed, turn off the DC regulated power supply;

[0025] Step 8, select the test point position to erect the cylindrical auger rod, install the support frame fixing ring on the cylindrical auger rod, and then connect the foldable support frame with the support frame fixing ring to form a triangular support structure to ensure that the cylindrical auger rod is erected at the test point;

[0026] Step 9, tighten and fix the wrench frame fixing ring on the cylindrical auger rod, and then connect the foldable rotary power-assisted wrench frame to the wrench frame fixing ring to complete the assembly of the supporting force application component;

[0027] Step 10, driving the cylindrical auger rod to rotate by means of a foldable rotating power-assisted wrench frame, and inserting the cylindrical auger rod into the soil layer at a depth to be measured;

[0028] Step 11, recording the position information of the measuring point through the RTK data acquisition system of the computer display and processing system;

[0029] Step 12, recording the initial ground temperature distribution at each insertion depth through the FBG demodulator of the computer display and processing system;

[0030] Step 13, turning on the DC regulated power supply again to provide a constant load to the active heating optical fiber sensor;

[0031] Step 14, using the FBG demodulator of the computer display and processing system, record the temperature change of each point at the full insertion depth during the heating process, and stop when the temperature reaches a stable state;

[0032] Step 15, driving the cylindrical auger rod to rotate by means of a foldable rotating power-assisted wrench frame, and pulling the cylindrical auger rod out of the soil layer at the depth to be measured;

[0033] Step 16, move the mobile station system to the next measurement point and repeat steps 1 to 15;

[0034] Step 17: After the survey area is measured, disconnect the connections between the various parts and disassemble the base station system and the mobile station system;

[0035] Step 18, using the data display and processing software built into the computer display and processing system, the initial formation temperature, thermal conductivity, thermal resistance and other information of the measurement points at each position are exported;

[0036] Step 19, using 3D modeling software, visualize the geothermal distribution, thermal conductivity and thermal resistance information of the survey area.

[0037] As a further technical solution, in step 8, the support frame fixing ring and the cylindrical spiral drill rod are initially tightened, but not completely tightened; in step 10, after the cylindrical spiral drill rod is completely inserted into the soil layer, the support frame fixing ring and the cylindrical spiral drill rod are completely tightened.

[0038] The beneficial effects of the present invention are:

[0039] 1. The mobile station host corrects the data information sent by the base station according to the satellite signals received in real time, thereby obtaining its own precise position, which can be displayed and stored in the computer. Through the computer display and processing system, the position and thermal physical property information of the target test point in the survey area can be quickly recorded;

[0040] 2. Actively heat the fiber core heat-resistant protective cover and the fiber core armored metal protective cover outside the fiber optic sensor to form multiple protections, thereby improving the reliability and service life of the fiber optic sensor;

[0041] 3. A conical drill bit is set at the bottom of the cylindrical spiral drill rod, which can be replaced according to different soil bodies and has strong versatility;

[0042] 4. The lower half of the cylindrical spiral drill rod is equipped with spiral blades. When external force is applied, the drill rod can easily penetrate the target survey depth by rotating with the help of the blades, which is more labor-saving.

[0043] 5. The base station system, computer display and processing system communicate with the mobile station host wirelessly, without the need for additional connecting cables, making mobile measurement convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural schematic diagram of the present invention.

[0045] Figure 2 It is a schematic diagram of the structure of the active heating optical fiber sensor in the present invention.

[0046] Explanation of the reference numerals: DC regulated power supply 1, base station system 2, computer display and processing system 3, mobile station host 4, cylindrical spiral drill rod 5, active heating optical fiber connecting cable 6, foldable rotating power-assisted wrench stand 7, wrench stand fixing ring 8, support frame fixing ring 9, foldable support frame 10, drill rod spiral blade 11, active heating optical fiber sensor 12, conical drill bit 13, mobile station system 14, optical fiber core 121, fiber core heat-resistant protective cover 122, fiber core armored metal protective cover 123, heating copper mesh 124, optical cable protective cover 125. DETAILED DESCRIPTION

[0047] The present invention will be described in detail below with reference to the accompanying drawings:

[0048] Embodiment 1: As attached Figure 1 , 2 As shown, a multifunctional in-situ soil thermal physical parameter measuring device based on active heating optical fiber and RTK technology includes a DC regulated power supply 1, a base station system 2, a computer display and processing system 3, a mobile station host 4, a cylindrical spiral drill rod 5, an active heating optical fiber connecting cable 6, a foldable rotating power-assisted wrench frame 7, a wrench frame fixing ring 8, a support frame fixing ring 9, a foldable support frame 10, a drill rod spiral blade 11, an active heating optical fiber sensor 12, a conical drill bit 13, a mobile station system 14, an optical fiber core 121, a fiber core heat-resistant protective cover 122, a fiber core armored metal protective cover 123, a heating copper mesh 124 and an optical cable protective cover 125.

[0049] Reference Figure 1The mobile station system 14 is composed of a mobile station host 4, a cylindrical spiral drill rod 5, an active heating optical fiber connecting cable 6, a foldable rotating power-assisted wrench frame 7, a wrench frame fixing ring 8, a support frame fixing ring 9, a foldable support frame 10, a drill rod spiral blade 11, an active heating optical fiber sensor 12 and a conical drill bit 13. Among them, the mobile station host 4 is cylindrical, and the front side includes buttons and indicator lights, and the bottom is provided with a network interface and a radio station, and a built-in battery. The mobile station host 4 is set on the top of the cylindrical spiral drill rod 5. The cylindrical spiral drill rod 5 is divided into an upper and lower section. The upper half has a smooth surface, and only the surface of the wrench frame fixing ring 8 and the support frame fixing ring 9 are set. The inner ring of the detachable wrench frame fixing ring 8 has a corresponding thread, and the wrench frame fixing ring 8 can be threadedly connected and fixed to the cylindrical spiral drill rod 5 by tightening the fixing ring buckle. After connecting multiple foldable rotating power-assisted wrench frames 7 to the outer periphery of the wrench frame fixing ring 8, the cylindrical spiral drill rod 5 can be inserted into the soil layer at a certain depth in a rotating manner by applying external force. The support frame fixing ring 9 is also connected to the outer wall of the cylindrical spiral drill rod 5 by threading, and a rubber pad is arranged on the inner ring of the support frame fixing ring 9 to facilitate connection with three foldable support frames 10, and form a stable support structure with triangular support. The support frame fixing ring 9 can be slightly tightened during the rotary drilling process to ensure the direction of the rotary drilling process is stable, and the support frame fixing ring 9 is completely tightened after the drilling is completed to ensure the stability of the mobile station system during the measurement process. The outer surface of the lower half of the cylindrical spiral drill rod 5 is provided with a drill rod spiral blade 11. When an external force is applied, the cylindrical spiral drill rod 5 can easily penetrate the target survey depth in a rotating manner with the help of the drill rod spiral blade 11. The wrench frame fixing ring 8 and the support frame fixing ring 9 serve as support force components, which can drive the cylindrical spiral drill rod 5 to rotate and support the cylindrical spiral drill rod 5 at the same time. Preferably, a conical drill bit 13 is detachably mounted at the bottom of the cylindrical spiral drill rod 5, and the conical drill bit 13 can be replaced according to different soil bodies, so it has better versatility.

[0050] Furthermore, an active heating optical fiber sensor 12 is fixed inside the cylindrical spiral drill rod 5. Figure 2 As shown, the active heating optical fiber sensor 12 is provided with an optical fiber core 121, a core heat-resistant protective sleeve 122, a core armored metal protective sleeve 123, a heating copper mesh 124 and an optical cable protective sleeve 125 from the inside to the outside, wherein the optical fiber core 121 can measure the temperature change along the core direction and transmit the data to the FBG demodulator. The heating copper mesh 124 is powered by a DC regulated power supply 1 and acts as a resistance wire to generate heat energy; the core heat-resistant protective sleeve 122 is sandwiched between the optical fiber core 121 and the heating copper mesh 124 to form heat-resistant protection for the optical fiber core 121; the optical cable protective sleeve 125 is wrapped in the outermost layer, i.e., the outer periphery of the heating copper mesh 124.

[0051] Furthermore, the reference station system 2 is fixedly mounted at a certain reference position, and communicates with the mobile station host 4 through a wireless connection, and can send the observed data and station coordinate information measured by it. The reference station system 2 has a built-in battery, and uses carrier phase observation values ​​for real-time dynamic positioning, thereby providing the three-dimensional coordinates of the station in the specified coordinate system in real time in the field, and achieving centimeter-level accuracy.

[0052] Furthermore, the computer display and processing system 3 includes a FBG demodulator, an RTK data acquisition system and data display and processing software built into the computer, wherein the RTK data acquisition system (computer) communicates with the mobile station host 4 via a wireless connection, and can display, process and store the measured temperature and position data on the computer. The mobile station host 4 corrects the data information transmitted from the reference station system 2 according to the satellite signal received in real time to obtain its own accurate position, and displays and stores it in the computer.

[0053] The active heating optical fiber connecting cable 6 includes a power supply line and a connecting optical fiber. The upper end of the power supply line passes through the top of the cylindrical spiral drill rod 5 and is electrically connected to the DC voltage-stabilized power supply 1. The lower end of the power supply line is electrically connected to the active heating optical fiber sensor 12 to realize power supply. The lower end of the connecting optical fiber is connected to the active heating optical fiber sensor 12 for communication. The upper end of the connecting optical fiber passes through the top of the cylindrical spiral drill rod 5 and is connected to the FBG demodulator for communication, so that real-time temperature information is displayed in the computer, and the thermal physical parameters of the soil layer are calculated using data display and processing software. That is, the computer display and processing system 3 is connected to the active heating optical fiber sensor 12 through the active heating optical fiber connecting cable 6. At the same time, the DC voltage-stabilized power supply 1 provides stable DC power to the active heating optical fiber sensor 12 through the active heating optical fiber connecting cable 6.

[0054] Embodiment 2: A multifunctional in-situ soil thermal physical parameter measurement method based on active heating optical fiber and RTK technology, using the device described in Embodiment 1, comprising the following steps:

[0055] Step 1, set up the base station system 2, and complete the base station setting by debugging the host of the base station system 2;

[0056] Step 2, assembling the mobile station host 4, the cylindrical spiral drill rod 5 and the conical drill bit 13;

[0057] Step 3, turn on the mobile station host 4, debug the configuration, connect with the base station system 2 and receive its data;

[0058] Step 4, turn on the computer display and processing system 3, connect with the base station system 2 and the mobile station host 4 by wireless mode, and debug and calibrate the RTK data acquisition system;

[0059] Step 5, connecting the DC regulated power supply 1 and the computer display and processing system 3 to the active heating optical fiber sensor 12 via the active heating optical fiber connecting cable 6;

[0060] Step 6, turning on the DC regulated power supply 1 to provide a constant load to the active heating optical fiber sensor 12, and debugging and correcting the optical fiber test data through the FBG demodulator of the computer display and processing system 3;

[0061] Step 7: After all calibrations are completed, turn off the DC regulated power supply 1;

[0062] Step 8, select the test point position to erect the cylindrical auger rod 5, install the support frame fixing ring 9 on the cylindrical auger rod 5, and then connect the foldable support frame 10 with the support frame fixing ring 9 to form a triangular support structure to ensure that the cylindrical auger rod 5 is erected at the test point; preferably, in step 8, the support frame fixing ring 9 and the cylindrical auger rod 5 are initially tightened, and not completely tightened to ensure the direction of the rotary drilling process is stable;

[0063] Step 9, tighten and fix the wrench frame fixing ring 8 on the cylindrical auger rod 5, and then connect the foldable rotary power-assisted wrench frame 7 to the wrench frame fixing ring 8 to complete the assembly of the supporting force application component;

[0064] Step 10, drive the cylindrical auger rod 5 to rotate by the foldable rotating power wrench frame 7, and insert the cylindrical auger rod 5 into the soil layer of the depth to be measured; after the cylindrical auger rod 5 is completely inserted into the soil layer, the support frame fixing ring 9 and the cylindrical auger rod 5 are completely tightened to ensure the stability of the mobile station system 14 during the measurement process;

[0065] Step 11, recording the position information of the measuring point through the RTK data acquisition system of the computer display and processing system 3;

[0066] Step 12, recording the initial ground temperature distribution at each insertion depth through the FBG demodulator of the computer display and processing system 3;

[0067] Step 13, turning on the DC regulated power supply 1 again to provide a constant load to the active heating optical fiber sensor 12;

[0068] Step 14, using the FBG demodulator of the computer display and processing system 3, record the temperature change of each point at the full insertion depth during the heating process, and stop when the temperature reaches a stable state;

[0069] Step 15, driving the cylindrical auger rod 5 to rotate by the foldable rotary power-assisted wrench frame 7, and pulling the cylindrical auger rod 5 out of the soil layer at the depth to be measured;

[0070] Step 16, move the mobile station system 14 to the next measurement point, and repeat steps 1 to 15;

[0071] Step 17, after the survey area is measured, disconnect the connections between the various parts, and disassemble and install the reference station system 2 and the mobile station system 14;

[0072] Step 18, using the data display and processing software built into the computer display and processing system 3, the initial formation temperature, thermal conductivity, thermal resistance and other information of each position measurement point are exported;

[0073] Step 19, using 3D modeling software, visualize the geothermal distribution, thermal conductivity and thermal resistance information of the survey area.

[0074] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and inventive concept of the present invention should fall within the protection scope of the claims attached to the present invention.

Claims

1. A multifunctional in-situ soil thermal physical parameter measurement device based on active heating optical fiber and RTK technology, characterized in that: include: A mobile station system (14) comprises a cylindrical spiral drill rod (5), a mobile station host (4) arranged at the top of the cylindrical spiral drill rod (5), a conical drill bit (13) arranged at the bottom of the cylindrical spiral drill rod (5), and a support force component arranged at the outer periphery of the cylindrical spiral drill rod (5), an active heating optical fiber sensor (12) being fixed inside the cylindrical spiral drill rod (5), and the support force component being used to drive the cylindrical spiral drill rod (5) to rotate and to support the cylindrical spiral drill rod (5); The reference station system (2) is fixedly mounted at the reference position and communicates with the mobile station host (4) via a wireless connection to send observation data and station coordinate information; A computer display and processing system (3) includes an FBG demodulator, an RTK data acquisition system and data display and processing software built into the computer. The RTK data acquisition system communicates with the mobile station host (4) via a wireless connection. The mobile station host (4) corrects the data information transmitted from the reference station system (2) based on the satellite signals received in real time to obtain its own precise position, and displays and stores it in the computer. An active heating optical fiber connecting cable (6) comprises a power supply line and a connecting optical fiber, wherein the power supply line passes through the top of a cylindrical spiral drill rod (5) and is electrically connected to a DC voltage-stabilized power supply (1), the bottom of the power supply line is electrically connected to an active heating optical fiber sensor (12) to realize power supply, the bottom of the connecting optical fiber is connected to the active heating optical fiber sensor (12) for communication, and the connecting optical fiber passes through the top of the cylindrical spiral drill rod (5) and is connected to an FBG demodulator for communication, thereby displaying real-time temperature information in the computer, and calculating the thermal physical property parameters of the soil layer using the data display and processing software.

2. The multifunctional in-situ soil thermal physical parameter measurement device based on active heating optical fiber and RTK technology according to claim 1 is characterized in that: The active heating optical fiber sensor (12) is provided with an optical fiber core (121), a fiber core heat-resistant protective sleeve (122), a fiber core armored metal protective sleeve (123), a heating copper mesh (124) and an optical cable protective sleeve (125) in order from the inside to the outside. The optical fiber core (121) is used to measure the temperature change along the core direction and transmit the data to the FBG demodulator; the heating copper mesh (124) is powered by a DC voltage-stabilized power supply (1) and acts as a resistance wire to generate heat energy; the fiber core heat-resistant protective sleeve (122) is sandwiched between the optical fiber core (121) and the heating copper mesh (124) to form heat-resistant protection for the optical fiber core (121); and the optical cable protective sleeve (125) is wrapped around the outermost layer, i.e., the outer periphery of the heating copper mesh (124).

3. The multifunctional in-situ soil thermal property parameter measuring device based on active heating optical fiber and RTK technology according to claim 1 is characterized in that: A detachable conical drill bit (13) is installed at the bottom of the cylindrical spiral drill rod (5), and the conical drill bit (13) is replaced according to different soil bodies.

4. The multifunctional in-situ soil thermal physical parameter measurement device based on active heating optical fiber and RTK technology according to claim 1 is characterized in that: The outer wall of the lower part of the cylindrical spiral drill rod (5) is provided with a drill rod spiral blade (11).

5. The multifunctional in-situ soil thermal physical parameter measurement device based on active heating optical fiber and RTK technology according to claim 1 is characterized in that: The base station system (2) has a built-in battery and uses carrier phase observation values ​​to perform real-time dynamic positioning, thereby providing the three-dimensional coordinates of the measuring station in a specified coordinate system in real time in the field and achieving centimeter-level accuracy.

6. The multifunctional in-situ soil thermal physical parameter measurement device based on active heating optical fiber and RTK technology according to claim 1 is characterized in that: The mobile station host (4) is cylindrical, has buttons and indicator lights on the front, a network interface and a radio station on the bottom, and a built-in battery.

7. The multifunctional in-situ soil thermal physical parameter measurement device based on active heating optical fiber and RTK technology according to any one of claims 1 to 6, characterized in that: The support force application assembly comprises a wrench frame fixing ring (8) and a support frame fixing ring (9); a plurality of foldable rotation power-assisted wrench frames (7) are arranged on the periphery of the wrench frame fixing ring (8) for rotating the cylindrical spiral drill rod (5); and a plurality of foldable support frames (10) are arranged on the periphery of the support frame fixing ring (9) for supporting the cylindrical spiral drill rod (5).

8. The multifunctional in-situ soil thermal physical parameter measurement device based on active heating optical fiber and RTK technology according to claim 7 is characterized in that: The wrench frame fixing ring (8) and the support frame fixing ring (9) are both connected to the outer wall of the cylindrical spiral drill rod (5) through threads; a rubber pad is arranged on the inner ring of the support frame fixing ring (9), and after being connected with the foldable support frame (10), a stable support structure with triangular support is formed.

9. A multifunctional in-situ soil thermal physical parameter measurement method based on active heating optical fiber and RTK technology, using the measurement device as claimed in claim 8, characterized in that: The following steps are involved: Step 1, set up the base station system (2), and complete the base station setting by debugging the host of the base station system (2); Step 2, assembling the mobile station host (4), the cylindrical spiral drill rod (5) and the conical drill bit (13); Step 3, turn on the mobile station host (4), debug the configuration, connect to the base station system (2) and receive its data; Step 4, turn on the computer display and processing system (3), connect with the base station system (2) and the mobile station host (4) by wireless means, and debug and calibrate the RTK data acquisition system; Step 5, connecting the DC regulated power supply (1) and the computer display and processing system (3) to the active heating optical fiber sensor (12) via the active heating optical fiber connecting cable (6); Step 6, turning on the DC regulated power supply (1) to provide a constant load to the active heating optical fiber sensor (12), and debugging and correcting the optical fiber test data through the FBG demodulator of the computer display and processing system (3); Step 7: After all calibrations are completed, turn off the DC regulated power supply (1); Step 8, select the test point position to erect the cylindrical spiral drill rod (5), install the support frame fixing ring (9) on the cylindrical spiral drill rod (5), and then connect the foldable support frame (10) with the support frame fixing ring (9) to form a triangular support structure to ensure that the cylindrical spiral drill rod (5) is erected at the test point; Step 9, tighten the wrench frame fixing ring (8) on the cylindrical spiral drill rod (5), and then connect the foldable rotary power-assisted wrench frame (7) to the wrench frame fixing ring (8), and assemble the supporting force-applying component; Step 10, driving the cylindrical auger rod (5) to rotate by means of the foldable rotary power-assisted wrench frame (7), and inserting the cylindrical auger rod (5) into the soil layer of the depth to be measured; Step 11, recording the position information of the measuring point through the RTK data acquisition system of the computer display and processing system (3); Step 12, recording the initial ground temperature distribution at each insertion depth through the FBG demodulator of the computer display and processing system (3); Step 13, turning on the DC regulated power supply (1) again to provide a constant load to the active heating optical fiber sensor (12); Step 14, using the FBG demodulator of the computer display and processing system (3), record the temperature change of each point at the full insertion depth during the heating process, and stop when a stable state is reached; Step 15, driving the cylindrical auger rod (5) to rotate by means of the foldable rotary power-assisted wrench frame (7), and pulling the cylindrical auger rod (5) out of the soil layer at the depth to be measured; Step 16, moving the mobile station system (14) to the next measurement point, and repeating steps 1 to 15; Step 17, after the survey area is measured, disconnect the connections between the various parts, and disassemble and install the base station system (2) and the mobile station system (14); Step 18, using the data display and processing software built into the computer display and processing system (3), derive the initial formation temperature, thermal conductivity, thermal resistance and other information of each measurement point; Step 19, using 3D modeling software, visualize the geothermal distribution, thermal conductivity and thermal resistance information of the survey area.

10. The multifunctional in-situ soil thermal physical parameter measurement method based on active heating optical fiber and RTK technology according to claim 9, characterized in that: In step 8, the support frame fixing ring (9) and the cylindrical spiral drill rod (5) are initially tightened, but not completely tightened; in step 10, after the cylindrical spiral drill rod (5) is completely inserted into the soil layer, the support frame fixing ring (9) and the cylindrical spiral drill rod (5) are completely tightened.

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