Soil body thermal consolidation apparatus and method

Abstract

This application relates to the field of building technology and provides a soil thermal reinforcement device and method. The device includes: a soil drilling equipment for forming a borehole in the soil to be reinforced; a drying device for generating a cyclone airflow that contacts the soil in the borehole to achieve a drying treatment of the soil in the borehole; and a heating device for heating the dried soil in the borehole, at least a portion of which extends into the borehole. This invention uses the cyclone airflow generated by the drying device to dry the soil in the borehole, which can quickly eliminate moisture in the soil and air, reducing the moisture content of the soil in the borehole. The heating device heats the soil in the borehole with low moisture content, preventing the formation of pressure that could damage the soil due to high-temperature vaporization of water, thus improving the thermal reinforcement quality of the soil.

Description

Technical Field

[0001] This invention belongs to the field of building technology, specifically relating to a soil thermal reinforcement device and method. Background Technology

[0002] Currently, in engineering construction, for example, the reinforcement of weak roadbeds mainly adopts construction methods such as cement-soil mixing piles and jet grouting piles; the reinforcement of weak tunnel surrounding rock is carried out by grouting. These reinforcement methods have good effects, but they have disadvantages such as environmental pollution and high cost.

[0003] New research and development technologies are constantly progressing, and thermal reinforcement is gradually being developed and applied. For example, drilling holes in soft soil and using thermal reinforcement rods or similar heating equipment to perform high-temperature thermal reinforcement of the soil has proven unsatisfactory in testing. Because natural soils contain varying moisture contents, and due to time constraints during construction, high-temperature reinforcement is generally used. Within the high-temperature influence range, water vaporizes at high temperatures, generating pressure. When this pressure exceeds the soil's constraint force, it damages the soil, thus destroying its overall structure. Furthermore, if the moisture does not evaporate, the soil temperature cannot be effectively raised, failing to achieve the desired reinforcement effect. Summary of the Invention

[0004] To address the problems in the prior art, this application proposes a soil thermal reinforcement device and method.

[0005] In a first aspect, the present invention proposes a soil thermal reinforcement device, comprising: a soil drilling device for forming a borehole in the soil to be reinforced; an air drying device for generating at least a cyclone airflow in contact with the soil in the borehole to achieve air drying treatment of the soil in the borehole; and a heating device for heating the soil in the borehole after air drying treatment, wherein at least a portion of the heating device extends into the borehole.

[0006] Further, the air-drying device includes: a cylindrical body with an internal cavity, an opening at the bottom end of the cylindrical body, and an air inlet at the top end or a side end near the top end of the cylindrical body; a hanging plate disposed within the cylindrical body and having a through hole for airflow; a tension spring vertically suspended from the bottom end of the hanging plate, with at least a portion of the top end of the tension spring located within the cylindrical body; a guide shroud connected to the tension spring and suspended from the bottom end of the cylindrical body by the tension spring, the top edge of the guide shroud surrounding the bottom edge of the cylindrical body and having a lateral spacing to form an air outlet; a spiral guide vane disposed on the outer wall of the cylindrical body; and a fan disposed within the cylindrical body for generating airflow that pushes against the guide shroud and overflows from the air outlet, thereby forming a cyclone airflow under the guiding action of the spiral guide vane.

[0007] The spiral guide vanes create an upward swirling airflow on the outer wall of the cylinder, which can quickly remove moisture from the borehole, resulting in high drying efficiency.

[0008] Furthermore, the hanging panel is a mesh panel.

[0009] Furthermore, the flow guide has a bowl-shaped or hollow hemispherical structure.

[0010] Furthermore, the air-drying device also includes a heating rod, which is disposed inside the cylinder and between the fan and the hanging plate; the heating rod has a cylindrical structure with a diameter smaller than the inner diameter of the cylinder, and the heating rod is coaxial with the cylinder.

[0011] The heating rods heat the gas inside the cylinder, turning the cyclone airflow into a hot airflow for better drying.

[0012] Furthermore, the air-drying device also includes: a hanger rod, erected at the top of the cylinder; a longitudinal beam, disposed at the top of the hanger rod, the longitudinal beam having a first sliding groove that slides and engages with the hanger rod; and a crossbeam, disposed at the top of the longitudinal beam, the crossbeam having a second sliding groove that slides and engages with the longitudinal beam.

[0013] By coordinating the booms, crossbeams, and longitudinal beams, the drying device's cylinder can be quickly moved to accommodate different boreholes, thereby improving the efficiency of soil thermal reinforcement.

[0014] Furthermore, the heating device includes:

[0015] The heating element has multiple heating ports arranged along its circumferential and longitudinal directions on its side end;

[0016] Front-end equipment includes gas supply equipment, power supply, and main unit;

[0017] The main gas pipe has one end connected to the gas supply equipment and the other end extending into the heating pipe, and is connected to multiple branch gas pipes; wherein, the gas supply equipment is used to deliver combustible gas into the heating pipe;

[0018] Multiple nozzles are arranged one-to-one on the multiple heating ports, and each nozzle is connected to a branch pipe to form a jet of combustible gas flowing through the nozzle and ejected out of the heating pipe.

[0019] Multiple electronic ignition devices are installed on one side of multiple nozzles, and the electronic ignition devices are also electrically connected to the main unit.

[0020] Multiple solenoid valves are installed one-to-one on multiple bronchial pipes and are electrically connected to the main unit.

[0021] Furthermore, the heating device also includes:

[0022] An annular support frame is fitted onto the outer wall of the heating tube;

[0023] An insulated operating handle is located at one end of the heating tube.

[0024] Secondly, the present invention proposes a method for soil reinforcement using the aforementioned soil thermal reinforcement device, wherein a borehole is formed in the soil to be reinforced using a soil drilling device; a drying device is used to generate at least a cyclone airflow that contacts the soil in the borehole to achieve air drying treatment of the soil in the borehole; at least a portion of a heating device is extended into the borehole after the air drying treatment is completed, and the heating device is used to heat the soil in the borehole after the air drying treatment is completed.

[0025] Furthermore, after the soil in the borehole that has undergone air drying is heated using a heating device, a sample of the soil in the borehole is taken for testing. If the test results do not meet the design requirements, the soil in the borehole is heated again until the test results meet the design requirements.

[0026] The soil thermal reinforcement device provided by this invention has at least the following beneficial effects compared with the prior art: by generating a cyclone airflow through the air-drying device to air-dry the soil in the borehole, the moisture in the soil and air in the borehole can be quickly eliminated, reducing the water content of the soil in the borehole. The heating device heats the soil in the borehole with low water content, and the borehole will not generate pressure that could damage the soil due to the high temperature vaporization of water, thus improving the quality of soil thermal reinforcement. Attached Figure Description

[0027] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0028] Figure 1 The diagram shows a top view of the borehole formed by the soil drilling equipment of the soil thermal reinforcement device of the present invention.

[0029] Figure 2 A schematic diagram showing one state of the air-drying device of the soil thermal reinforcement apparatus of the present invention is provided.

[0030] Figure 3 Showing Figure 2 A schematic diagram of another configuration of the air-drying device.

[0031] Figure 4 A schematic diagram of the heating device of the soil thermal reinforcement device of the present invention is shown.

[0032] Figure 5 Showing Figure 4 A cross-sectional schematic diagram of the heating tube of the heating device.

[0033] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0034] Reference numerals: 100-Drill hole; 1-Cylinder body; 101-Air inlet; 102-Air outlet; 2-Hanging plate; 3-Tension spring; 4-Guide shroud; 5-Spiral guide vane; 6-Fan; 7-Heating rod; 8-Hanging rod; 9-Longitudinal beam; 10-Crossbeam; 11-First slide groove; 12-Second slide groove; 13-Heating tube; 14-Front-end equipment; 15-Nozzle; 16-Solenoid valve; 17-Annular support frame; 18-Insulated operating handle; 19-Main air pipe; 20-Branch air pipe; 21-Electronic ignition device. Detailed Implementation

[0035] The following will be combined with the appendix Figure 1 To be continued Figure 5 The present invention will be further described below.

[0036] The soil thermal reinforcement device proposed in this invention includes a soil drilling rig 100, a drying device, and a heating device.

[0037] like Figure 1 As shown, the soil drilling equipment 100 forms boreholes 100 in the soil to be reinforced. The boreholes 100 are arranged in an array. The diameter of the boreholes 100 is about 10cm, and the center of the holes is arranged in an equilateral triangle with a side length of 30cm-40cm. The parameters can be adjusted according to the effectiveness. The depth of the boreholes 100 is set according to the reinforcement depth requirements.

[0038] The air-drying device is used to generate at least a cyclonic airflow that contacts the soil inside the borehole 100 in order to air-dry the soil inside the borehole 100.

[0039] Adjust the air-drying time based on soil moisture content tests. Use commercially available soil moisture testing equipment to test the moisture content of the air-dried soil; generally, the moisture content of the air-dried soil should not exceed 0.5%.

[0040] A heating device is used to heat the soil inside the borehole 100 after it has been air-dried, and at least a portion of the heating device extends into the borehole 100.

[0041] like Figure 2-3 As shown, the air-drying device includes: a cylinder 1, a hanging plate 2, a tension spring 3, a flow guide 4, a spiral flow guide 5, a fan 6, and a heating rod 7.

[0042] The cylinder 1 has an internal cavity, an opening at the bottom, and an air inlet 101 at the top or near the top.

[0043] In some embodiments, the cylinder 1 is a cylindrical structure, which is set vertically. Its bottom end is an open structure that is not closed to form an open end. An air inlet 101 is provided at the top end and / or the side end near the top end of the cylindrical structure. Air enters the cylinder 1 from the air inlet 101 and is blown out from the bottom end of the cylinder 1.

[0044] The hanging plate 2 is disposed inside the cylinder 1 and has a through hole for airflow.

[0045] In some embodiments, the hanging plate 2 is a mesh plate, which can both ensure uniform airflow and provide support for the tension spring 3.

[0046] In some embodiments, the mounting plate 2 is a horizontally arranged straight crossbar or crossbar structure, and has multiple hooks symmetrically arranged around the center for installing the tension spring 3.

[0047] The tension spring 3 is vertically suspended at the bottom end of the hanging plate 2, and the top end of the tension spring 3 is at least partially located inside the cylinder 1. In some embodiments, multiple tension springs 3 are provided, symmetrically arranged at the bottom end of the hanging plate 2, with the center of symmetry also being the central axis of the cylinder 1.

[0048] The air guide 4 is connected to the bottom end of the tension spring 3 and is suspended from the bottom end of the cylinder 1 by the tension spring 3. The top edge of the air guide 4 surrounds the bottom edge of the cylinder 1 and has a lateral spacing to form an air outlet 102.

[0049] In some embodiments, the flow deflector 4 has a bowl-shaped or hollow hemispherical structure.

[0050] A spiral guide vane 5 is disposed on the outer wall of the cylinder 1. The spiral guide vane 5 is a spiral-structured guide metal sheet structure that spirally winds around the cylinder 1 at least once.

[0051] The fan 6 is installed inside the cylinder 1 to generate airflow that pushes against the guide shroud 4 and overflows from the air outlet 102, so as to form a cyclone airflow under the guidance of the spiral guide vane 5.

[0052] like Figure 2 As shown, after the blower 6 generates airflow, the airflow passes through the initial guide wall of the cylinder 1 and then impacts the guide shroud 4. Under the action of the guide shroud 4, the airflow changes direction and is blown upward from the edge of the guide shroud 4, i.e., the air outlet 102. Under the guidance of the spiral guide vane 5, an upward cyclone airflow is generated. During the continuous upward movement of the cyclone airflow, it carries moisture from the soil inside the borehole 100 (including moisture in the soil inside the borehole 100 and moisture in the air inside the borehole 100) upward and rushes out of the borehole 100. As the blower 6 continues to operate, the soil inside the borehole 100 is dried until the required conditions are met.

[0053] Combined with appendix Figure 3 As shown, the guide shield 4 is suspended under the action of the tension spring 3. When the airflow thrust generated by the fan 6 increases, the airflow pushes the guide shield 4 downward, and at the same time, the tension spring 3 stretches, increasing the distance between the guide shield 4 and the cylinder 1, thus enlarging the air outlet 102, allowing more airflow to blow upward from the air outlet 102. When the airflow thrust generated by the fan 6 decreases, the tension spring 3 returns to its original position, the guide shield 4 rises, and the air outlet 102 shrinks. The airflow thrust generated by the fan 6 is controlled by the motor speed of the fan 6, so the airflow volume at the air outlet 102 of the guide shield 4 can be adaptively adjusted after adjusting the motor speed of the fan 6. This ensures that a uniform swirling airflow is always generated on the outer wall of the cylinder 1.

[0054] Conventional drying equipment typically uses a hot air gun to blow hot air through the borehole 100 to dry it. However, the hot air blown by the hot air gun is vertical, resulting in a small contact area and short contact time between the airflow and the soil inside the borehole 100, leading to low drying efficiency. In contrast, the cyclone airflow used in this embodiment employs a spiral upward flow, allowing for full contact with the soil inside the borehole 100. This results in a longer contact path, longer contact time, higher drying efficiency, and better drying effect. Furthermore, the airflow direction within the borehole 100 is specific, preventing turbulence that could affect the overflow of airflow from the bottom. The drying effect is uniform across different height areas within the borehole 100, avoiding uneven drying conditions where the bottom has higher moisture content and the top has lower moisture content.

[0055] To improve drying efficiency, a heating rod 7 can be installed inside the cylinder 1. The heating rod 7 is located between the fan 6 and the hanging plate 2. The heating rod 7 has a round rod structure with a diameter smaller than the inner diameter of the cylinder 1. The heating rod 7 is coaxial with the cylinder 1.

[0056] Heating rod 7 heats cylinder 1 and the air inside cylinder 1, making the airflow blown out by fan 6 a hot airflow, resulting in better drying effect. Of course, the temperature of heating rod 7 is adjustable. In addition, because this embodiment generates cyclone airflow, even if the heating rod 7 causes the water inside borehole 100 to vaporize at high temperature, increasing the air pressure inside borehole 100, the cyclone airflow can quickly carry this high-pressure airflow outside borehole 100, preventing it from damaging the soil.

[0057] If the cylinder 1 of the air-drying device and the structures on the cylinder 1, such as the hanging plate 2, tension spring 3, flow guide shroud 4, spiral flow guide vane 5, fan 6, and heating rod 7, are considered as an air-drying unit, then in one embodiment, the soil thermal reinforcement device can have multiple air-drying units. The air-drying units are distributed in an array of boreholes 100, so that multiple boreholes 100 can be air-dried simultaneously, ensuring that the soil within the area covered by the multiple boreholes 100 is dried synchronously, avoiding the migration of moisture in adjacent boreholes 100 due to time differences in air drying, which would affect the air-drying effect.

[0058] In some embodiments, in order to achieve simultaneous air drying of multiple boreholes 100, the air drying device further includes: a hanger 8, a longitudinal beam 9, and a transverse beam 10.

[0059] There are multiple longitudinal beams 9 and transverse beams 10. The longitudinal beams 9 and transverse beams 10 form an integral hanger, which is connected to the lifting device, thereby realizing the synchronous displacement and lifting of the hanger and the multiple drying units suspended at the bottom of the hanger.

[0060] The hanger includes a plurality of longitudinal beams 9 spaced apart in the longitudinal direction on a first horizontal plane, and a transverse beam 10 spaced apart at the top of the plurality of longitudinal beams 9 in the transverse direction on a second horizontal plane. The second horizontal plane is higher than the first horizontal plane.

[0061] The longitudinal beam 9 is provided with a first sliding groove 11, and the transverse beam 10 is provided with a second sliding groove 12. The longitudinal beam 9 is provided with a slider, which slides and engages with the second sliding groove 12, so that each longitudinal beam 9 can slide horizontally along the length of the transverse beam 10, thereby adjusting the position of the longitudinal beam 9 relative to the transverse beam 10.

[0062] The hanger 8 is installed at the top of the cylinder 1, meaning that a hanger 8 is vertically installed at the top of the cylinder 1 of each drying unit. The hanger 8 slides and engages with the first sliding groove 11, thereby achieving a sliding engagement between the hanger 8 and the longitudinal beam 9. Multiple hangers 8 can be installed on each longitudinal beam 9, meaning that multiple drying units can slide and engage on each longitudinal beam 9. The spacing between these multiple drying units in the longitudinal direction is adjusted by sliding along the length of the longitudinal beam 9.

[0063] Based on the distribution of the boreholes 100, the relative positions of the longitudinal beams 9 and transverse beams 10 of the adjustable hanger, as well as the relative positions of the lifting rods 8, are pre-adjusted so that the array of drying units formed by the lifting rods 8 corresponds to the array formed by the boreholes 100, i.e., each borehole 100 corresponds to one drying unit. Using lifting equipment, the entire hanger carrying the drying units is lifted and transported above the boreholes 100, and then slowly lowered so that the drying units extend into the boreholes 100. The lowering depth is adjustable, thereby controlling the drying depth of the drying units in the boreholes 100.

[0064] The soil within borehole 100 typically exhibits different compositional properties due to varying depths, resulting in varying moisture content. Moisture content generally increases with borehole depth. Soil within the same area often shares similar compositional properties; for example, multiple boreholes 100 drilled within a one-square-meter area may have similar moisture content or humidity. By using a gantry to simultaneously lower multiple drying units into boreholes 100 within this area of ​​similar soil composition, simultaneous drying of boreholes 100 within that area is achieved. Different lowering depths allow for simultaneous drying at different depths within the same area, significantly improving soil drying efficiency. Furthermore, simultaneous drying of multiple boreholes 100 within the same area also enhances drying quality. If adjacent boreholes 100 are dried asynchronously, moisture in the soil of the undried borehole 100 may seep into the soil of the already dried borehole 100, causing the actual moisture content of the soil in the already dried borehole 100 to fail to meet requirements. Synchronous drying of boreholes 100 within the same area effectively solves this problem. Alternatively, this embodiment can also employ a superimposed drying method for boreholes 100 in different soil areas. For example, based on the soil heat reinforcement requirements, the soil to be reinforced can be divided into multiple rectangular areas. These rectangular areas are arranged in a rectangular array; for example, the soil to be reinforced may include n rows and m columns of rectangular areas. First, the rectangular area in row 1 column is dried, then the rectangular area in row 2 columns is dried, and so on, completing the entire n rows and m columns of rectangular areas. Each rectangular area includes x rows and y columns of boreholes 100. The drying units on the hanger are arranged in a rectangular array of a rows and b columns, where a is greater than x and b is greater than y. When drying a subsequent rectangular area, the drying unit on the hanger not only fully covers all the drill holes 100 in that subsequent rectangular area, but also includes several rows (number of rows less than x) or several columns (number of columns less than y) of drill holes 100 from the preceding rectangular area. This creates an overlapping drying zone between adjacent rectangular areas, avoiding moisture seepage caused by differences in drying time and improving the drying effect.

[0065] like Figure 4-5 As shown, the heating device includes: a heating tube 13, a front-end device 14, multiple nozzles 15, a solenoid valve 16, a ring support frame 17, an insulated operating handle 18, a main gas pipe 19, a branch gas pipe 20, and an electronic ignition device 21.

[0066] The heating tube 13 has multiple heating ports on its side end along both the circumferential and longitudinal directions. In this embodiment, the heating tube 13 has three heating ports spaced at intervals along its circumferential direction.

[0067] The front-end equipment 14 includes a gas supply device, a power supply and a main unit. The gas supply device is used to deliver combustible gas into the heating pipe 13.

[0068] One end of the main air pipe 19 is connected to the air supply equipment, and the other end extends into the heating pipe 13 and is connected to multiple branch pipes 20. The number of branch pipes 20 is the same as the number of heating ports on the heating pipe 13, that is, each heating port corresponds to one branch pipe 20.

[0069] Multiple nozzles 15 are arranged one-to-one on multiple heating ports. Each nozzle 15 is connected to a branch pipe 20 to form a jet of combustible gas flowing through the nozzle 15 and ejected out of the heating pipe 13. In other words, a nozzle 15 is installed on each heating port of the heating pipe, and each nozzle 15 is connected to the main gas pipe 19 through a branch pipe 20, and then connected to the gas supply equipment through the main gas pipe 19.

[0070] Multiple electronic ignition devices 21 are installed one-to-one with each of the multiple nozzles 15 on one side, and the electronic ignition devices 21 are also electrically connected to the main unit. The main unit is equipped with a switch, which is used to activate the electronic ignition devices 21 to ignite the combustible gas ejected from the nozzles 15. The combustible gas burns at the nozzles 15, heating the soil.

[0071] Multiple solenoid valves 16 are installed one-to-one on multiple bronchial pipes 20 and are electrically connected to the main unit. That is, each bronchial pipe 20 is equipped with one solenoid valve 16. The solenoid valve 16 is connected to the switch of the main unit. By opening and closing the solenoid valve 16, the gas supply to or from the corresponding nozzle 15 is controlled.

[0072] An annular support frame 17 is fitted onto the outer wall of the heating tube 13. In this embodiment, there are two annular support frames 17, respectively fitted onto both ends of the heating tube 13. The diameter of the annular support frame 17 is smaller than the inner diameter of the drill hole 100.

[0073] The heat-insulating operating handle 18 is located at one end of the heating tube 13 and at opposite ends of the two annular support frames 17.

[0074] After the drilled hole 100 is dried, it is heated using a heating device. In use, the heating tube 13 is inserted into the drilled hole 100 using the insulated operating handle 18, the power is turned on, and the nozzle 15 sprays flames to heat the inner wall of the drilled hole 100.

[0075] Similarly, the heating device in this embodiment includes multiple heating units, each of which includes a heating tube 13. The heating units are mounted on the aforementioned hanger, that is, the insulated operating handle 18 of the heating tube 13 of the heating unit can also be connected to the hanger rod 8. The hanger rod 8 is then connected to the hanger, and the hanger is lifted by a lifting device, so that the multiple heating units are simultaneously lowered into the multiple boreholes 100, thereby achieving synchronous heating of the multiple boreholes 100.

[0076] In one embodiment, there are two hangers, and a connecting frame is connected to the top of the two hangers for connecting to lifting equipment. One hanger is equipped with multiple air-drying units, and the other hanger is equipped with multiple heating units. By lowering the connecting frame once by the lifting equipment, the air-drying of borehole 100 in one rectangular area and the heating of borehole 100 in another rectangular area can be achieved. This effectively improves the efficiency of soil thermal reinforcement.

[0077] Based on the same inventive concept, the method for soil reinforcement using the soil thermal reinforcement device of any of the above embodiments proposed in this invention includes the following steps:

[0078] A 100-hole hole is formed in the soil to be reinforced using a soil drilling rig.

[0079] A cyclone airflow is generated by using a drying device to contact the soil inside the borehole 100, thereby achieving the drying treatment of the soil inside the borehole 100.

[0080] At least a portion of the heating device is inserted into the borehole 100 after the air-drying process is completed, and the soil inside the borehole 100 after the air-drying process is heated by the heating device.

[0081] After the soil in the borehole 100 that has undergone air drying is heated using a heating device, a sample test is then conducted on the soil in the borehole 100. If the test results do not meet the design requirements, the soil in the borehole 100 is heated again until the test results meet the design requirements.

[0082] When heating the soil within 100 mm of the borehole after air drying, the heating temperature should be gradually increased, generally from 200 degrees to 1300 degrees, and the time is generally 4-5 hours. Different parameters can be used for different soil types according to the test.

[0083] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A soil thermal reinforcement device, characterized in that, include: Soil drilling equipment, used to create boreholes in soil to be reinforced; A drying device is used to generate at least a cyclonic airflow that contacts the soil in the borehole in order to dry the soil in the borehole. A heating device for heating the soil inside the borehole after air drying, wherein at least a portion of the heating device extends into the borehole; The air-drying device includes: The cylinder has an internal cavity, an opening at the bottom, and an air inlet at the top or near the top. A hanging plate is disposed inside the cylinder and has through holes for airflow. A tension spring is vertically suspended from the bottom end of the hanging plate, with at least a portion of the top end of the tension spring located inside the cylinder. A flow guide is connected to the tension spring and suspended at the bottom end of the cylinder by the tension spring. The top edge of the flow guide surrounds the bottom edge of the cylinder and has a lateral spacing to form an air outlet. Spiral guide vanes are disposed on the outer wall of the cylinder; and A fan, installed inside the cylinder, is used to generate airflow that pushes against the guide shroud and overflows from the air outlet, so as to form a cyclone airflow under the guiding action of the spiral guide vanes.

2. The soil thermal reinforcement device according to claim 1, characterized in that, The hanging panel is a mesh panel.

3. The soil thermal reinforcement device according to claim 1, characterized in that, The air deflector has a bowl-shaped or hollow hemispherical structure.

4. The soil thermal reinforcement device according to claim 1, characterized in that, The air-drying device also includes a heating rod, which is disposed inside the cylinder and between the fan and the hanging plate; the heating rod has a cylindrical structure with a diameter smaller than the inner diameter of the cylinder, and the heating rod is coaxial with the cylinder.

5. The soil thermal reinforcement device according to claim 4, characterized in that, The air-drying device also includes: The lifting rod is erected at the top of the cylinder; A longitudinal beam is provided at the top of the suspension rod, and the longitudinal beam is provided with a first sliding groove that slides and engages with the suspension rod. A crossbeam is provided at the top of the longitudinal beam, and a second sliding groove is provided on the crossbeam to slide and engage with the longitudinal beam.

6. The soil thermal reinforcement device according to claim 1, characterized in that, The heating device includes: The heating element has multiple heating ports arranged along its circumferential and longitudinal directions on its side end; Front-end equipment includes gas supply equipment, power supply, and main unit; The main gas pipe has one end connected to the gas supply equipment and the other end extending into the heating pipe, and is connected to multiple branch gas pipes; wherein, the gas supply equipment is used to deliver combustible gas into the heating pipe; Multiple nozzles are arranged one-to-one on the multiple heating ports, and each nozzle is connected to a branch pipe to form a jet of combustible gas flowing through the nozzle and ejected out of the heating pipe. Multiple electronic ignition devices are installed on one side of multiple nozzles, and the electronic ignition devices are also electrically connected to the main unit. Multiple solenoid valves are installed one-to-one on multiple bronchial pipes and are electrically connected to the main unit.

7. The soil thermal reinforcement device according to claim 6, characterized in that, The heating device also includes: An annular support frame is fitted onto the outer wall of the heating tube; An insulated operating handle is located at one end of the heating tube.

8. A method for soil reinforcement using the soil thermal reinforcement device as described in any one of claims 1-7, characterized in that, A hole is formed in the soil to be reinforced using a soil drilling equipment. The air-drying device generates at least a cyclone airflow that comes into contact with the soil inside the borehole, thereby achieving the air-drying treatment of the soil inside the borehole. At least a portion of the heating device is inserted into the borehole after it has been air-dried, and the soil inside the borehole is heated using the heating device.

9. The soil thermal reinforcement method according to claim 8, characterized in that, After the soil in the borehole that has been air-dried is heated using a heating device, a sample of the soil in the borehole is taken for testing. If the test results do not meet the design requirements, the soil in the borehole is heated again until the test results meet the design requirements.

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