Paver and paving method for frost heaving resistant base layer of road

Abstract

The invention provides a road anti-frost heaving base layer paver and a paving method. The road anti-frost heaving base layer paver comprises a sweeping board, and a carriage is arranged at the top of the sweeping board; a fixing frame is arranged at one end of the sweeping board, and a compacting cylinder is arranged at the bottom of the fixing frame, serves as the tail of the paver and is used for compacting a pavement; a material distributing mechanism is arranged at the other end of the sweeping board, is the head of the paver and is used for uniformly dispersing pavement materials; a frame is arranged at the bottom of the trolley plate, and wheels are arranged on the two sides of the frame. A heating mechanism is arranged at the head part of the sweeping board and is used for preheating the pavement and reducing the influence of a frozen layer on pavement paving. Dual preheating functions of high-pressure and high-temperature hot water spraying and electric heating are integrated, a surface frozen layer is rapidly melted through hot water, then a deep frozen layer is continuously heated through the heating piece, it is ensured that the temperature of a base layer rises, no ice blocks are left, the problem of pavement gaps caused by the frozen layer is fundamentally solved, and the pavement stability is improved; preheating, paving and compacting are synchronously carried out, no time interval exists between treatment and paving, the base layer is effectively prevented from being frozen again, and the paving effect is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of paver technology, specifically to a highway frost-resistant base course paver and paving method. Background Technology

[0002] A paver is a high-efficiency road construction machinery designed specifically for road construction. Its core function is to evenly spread road construction materials such as asphalt, cement concrete, or stabilized soil on the road base or surface layer, and to perform preliminary compaction and leveling of the materials through a built-in screed device, thereby forming a flat, dense, and uniformly thick road structure layer that meets design requirements. Pavers are widely used in various asphalt or cement pavement projects such as highways, urban roads, airport runways, and bridge paving, and can significantly improve road smoothness, durability, and driving comfort. They are an indispensable key piece of equipment in modern road construction.

[0003] The patent with publication number CN212426651U discloses a highway construction paver. By connecting a cleaning nozzle assembly to the front end of the paver body, the emulsified asphalt nozzle in the cleaning nozzle assembly can spray the asphalt bonding layer through the spray head, so that the highway construction paver can simultaneously spray the asphalt bonding layer and pave the asphalt pavement, improving work efficiency. At the same time, a V-shaped dust removal nozzle is connected to the front of the emulsified asphalt nozzle, which can blow the road dust to both sides through the dust removal nozzle on the V-shaped dust removal nozzle, improving the effect of emulsified asphalt spraying and enhancing the quality of asphalt pavement paving.

[0004] However, when constructing highways in high-altitude areas, such as those at altitudes of 2000-3700 meters, the long-term snow cover makes the roadbed susceptible to repeated freeze-thaw cycles. Especially during paving, the frozen layer and ice blocks in the roadbed may not completely melt during construction, resulting in gaps after completion and affecting the overall stability and service life of the road surface. Pre-treatment of the road base is not only costly, but also involves a long time interval between treatment and paving, making the base prone to refreezing and perpetuating the aforementioned problems. Summary of the Invention

[0005] The main objective of this invention is to provide a road frost-resistant base course paver and paving method to solve the problem of poor road surface stability after construction by existing pavers in high-altitude and low-temperature areas.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A road frost-resistant base course paver includes a platform with a cargo box on top; One end of the paver is equipped with a fixed frame, and the bottom of the fixed frame is equipped with a compaction cylinder, which is the tail of the paver and is used to compact the road surface. The other end of the vehicle is equipped with a material distribution mechanism, which serves as the paver head and is used to evenly distribute the road surface material. The bottom of the vehicle is equipped with a frame, and wheels are installed on both sides of the frame; The front of the vehicle is equipped with a heating mechanism to preheat the road surface and reduce the impact of the frozen layer on the road paving.

[0007] In a preferred embodiment, the material distribution mechanism includes a connecting plate that is fixedly connected to the vehicle platform; The top of the connecting plate is equipped with several hydraulic cylinders, and the output end of the hydraulic cylinders is equipped with a movable box, which is located below the connecting plate. The movable box is equipped with several material distribution racks; The bottom of the material distribution frame is equipped with several material distribution blades; the material distribution blades are driven by a motor structure on the side of the material distribution frame.

[0008] In a preferred embodiment, the heating mechanism includes a discharge pipe, the two ends of which extend to both sides of the vehicle body; Both ends of the discharge pipe are equipped with fixing pipes, which are located on both sides of the vehicle plate; A feeding mechanism is provided on the side of the fixed pipe away from the discharge pipe; The top of the fixed frame is equipped with a storage box, which is connected to the feeding mechanism; the storage box has a built-in heating structure and is used to store the heating medium for preheating the road surface. Several spray pipes are provided on the side of the discharge pipe away from the car plate; The feeding mechanism is used to send the heating medium in the storage box into the discharge pipe through the fixed pipe, and finally spray it onto the road surface through the spray pipe.

[0009] In the preferred embodiment, the discharge pipe is provided with several connecting sleeves, and a connecting rod is provided at the bottom of the connecting sleeve; A second connecting block is provided on the side of the bottom of the connecting rod away from the vehicle board, and the second connecting block is hinged to the first connecting block; Several first connecting blocks are connected together to a movable plate; The bottom of the movable plate is provided with a groove, and several heating elements are installed in the groove; The movable platform has several rollers on the side closest to the vehicle platform; Several springs are installed between the top of the movable plate and the connecting rod.

[0010] In the preferred embodiment, drive frames are provided on both sides of the vehicle body, and the drive frames are connected to the fixed tube; The drive frame is used to move the heating mechanism closer to or away from the vehicle body.

[0011] In a preferred embodiment, the drive frame includes several vertical plates that are fixedly connected to the vehicle body. A fixing rod is provided on the side of the vertical plate away from the wheel, and the fixing rod is provided with a fixing sleeve; A telescopic rod is fixedly connected to the fixed sleeve on the same side, and the telescopic end of the telescopic rod is connected to the fixed tube.

[0012] In the preferred embodiment, a fixed plate is fixed to the telescopic end of the telescopic rod, and a movable sleeve is fixed to the fixed plate; The movable sleeve is movably fitted onto the outside of the telescopic rod and the fixed sleeve; The side of the movable sleeve has a movable groove, through which the fixing rod passes and can slide. The movable sleeve is hinged to a connecting buckle on the outside, and the connecting buckle is fastened to the outside of the fixed tube; A threaded post is fixed to the outside of the movable sleeve. The threaded post passes through one end of the connecting buckle and is threadedly connected to a nut.

[0013] In a preferred embodiment, the feeding mechanism includes a pump located at the bottom of the vehicle platform; The pump's input end is connected to the storage tank via a feed pipe; The pump's output end is equipped with a connecting pipe, and the end of the fixed pipe furthest from the discharge pipe is connected to the connecting pipe via a flexible hose. The hose is S-shaped, and the end near the connecting pipe is fixed to the vertical plate with a fixing buckle.

[0014] A method for paving a frost-resistant base course for highways, using a frost-resistant base course paver, includes the following steps: S1. When the paver travels to the paving position, the heating mechanism extends; S2. The heating mechanism heats the road base layer, melts the frozen layer, and raises the temperature of the base layer; S3: The paver moves slowly, and the road material is fed in synchronously. S4. The paver disperses and compacts the road surface material; S5, Paving completed.

[0015] In the preferred embodiment, in S1, the heated structure is extended and then connected to the hopper at the paver head, where road raw materials are poured into the hopper and guided onto the roadbed; In S2, the road surface is first sprayed with high-pressure, high-temperature hot water. After spraying, the road surface is continuously heated to solve the freezing problem of the frost heave base layer, so that the subsequent paving is not affected by the frozen layer. If there is ice or snow covering the S1 section, remove the ice and snow first.

[0016] This invention provides a road frost-resistant base course paver and paving method. By adopting the above solution, the following beneficial effects are achieved: It integrates high-pressure, high-temperature hot water jetting and electric heating dual preheating functions. First, it quickly melts the surface frozen layer with hot water, and then the heating element continuously heats the deep frozen layer to ensure that the base layer temperature rises and there are no residual ice blocks. This fundamentally solves the problem of road surface gaps caused by frozen layers and improves road surface stability.

[0017] Preheating, paving, and compaction are carried out simultaneously, with no time interval between treatment and paving, effectively preventing the base layer from refreezing and ensuring paving results.

[0018] There is no need to arrange a separate frozen layer treatment process, which improves construction efficiency and reduces costs compared to traditional solutions.

[0019] The material distribution mechanism adjusts its height using a hydraulic cylinder, and the rotating distribution blades disperse the material to ensure uniform paving thickness. The compaction cylinder compacts the material synchronously, which is more timely and effective compared to the existing method of using a road roller to follow and compact it.

[0020] The equipment is highly integrated, with coordinated control of each process, making it easy to operate and reducing labor intensity. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a structural schematic diagram from another perspective of the present invention; Figure 4 This is a front view of an embodiment of the present invention with the hopper connected; Figure 5 This is a bottom view of the feeding mechanism of the present invention. Figure 6 This is a front view of the feeding mechanism of the present invention; Figure 7 This is a side view of the drive frame structure of the present invention; Figure 8 This is a schematic diagram of the structure of the heating mechanism of the present invention; Figure 9 This is a side cross-sectional view of the heating mechanism of the present invention.

[0022] In the picture: Car platform 1, car body 101, fixing frame 102, compaction cylinder 103, car frame 104, wheel 105, connecting plate 201, hydraulic cylinder 202, movable box 203, material distribution frame 204, material distribution blade 205, drive frame 3, vertical plate 301, fixing rod 302, fixing sleeve 303, movable sleeve 304, connecting buckle 305, nut 306, telescopic rod 307, movable groove 308, fixing plate 309, storage box 4, fixing pipe 5, feeding mechanism 6, hose 601, fixing buckle 602, connecting pipe 603, pump 604, feed pipe 605, heating mechanism 7, discharge pipe 701, spray pipe 702, connecting sleeve 703, connecting rod 704, movable plate 705, first connecting block 706, second connecting block 707, roller 708, heating element 709, spring 710. Detailed Implementation

[0023] Example 1: like Figure 1 , 2 As shown in 3, 4, 5, 6, 7, 8 and 9, a highway frost-resistant base course paver includes a platform 1, which is welded from Q355B steel. A cargo box 101 is welded to the top of the platform 1. The cargo box 101 is the driver's seat for the driver to sit and operate. A fixing frame 102 is welded to one end of the vehicle plate 1. The fixing frame 102 is a Q355B steel truss structure. The bottom of the fixing frame 102 is rotatably connected to a compaction cylinder 103 through a bearing. The compaction cylinder 103 is preferably made of carbon steel with a smooth surface. This end is the tail of the paver and is used for compaction of the road surface after paving. The other end of the paver 1 is equipped with a material distribution mechanism, which is the paver head, used to evenly distribute the road material; a frame 104 is welded to the bottom of the paver 1, and wheels 105 are connected to both sides of the frame 104 through wheel hubs, preferably track wheels; a heating mechanism 7 is provided at the head of the paver 1, used to preheat the road surface, thereby melting the frozen layer and raising the temperature of the base layer, so that the frozen layer in the base layer melts and the gaps are exposed, so that the asphalt and other road materials can fill the gaps during subsequent paving, thereby reducing the impact of the frozen layer on the paving quality.

[0024] Furthermore, the material distribution mechanism includes a connecting plate 201 fixedly connected to the top of the vehicle platform 1; the top of the connecting plate 201 is evenly provided with 2-4 hydraulic cylinders 202, preferably of model HSG200×500, and the output end of the hydraulic cylinder 202 is connected to a movable box 203 through a flange. The movable box 203 is located below the connecting plate 201 and its height can be adjusted by the hydraulic cylinder 202 to adapt to different paving requirements; two material distribution frames 204 are welded to the bottom of the movable box 203; the bottom end of each material distribution frame 204 is rotatably connected to a material distribution blade 205 through a bearing; the material distribution blade 205 is driven by a motor structure on the side of the material distribution frame 204, the motor structure including a geared motor, preferably of model Y132M-4, fixed on the material distribution frame 204, the geared motor being connected to the rotating shaft of the material distribution blade 205 through a chain or coupling, driving the material distribution blade 205 to rotate, thereby achieving uniform dispersion of the road material.

[0025] In a preferred embodiment, the sides of the vehicle platform 1 and the vehicle frame 104 are provided with hoppers. The hoppers are the hoppers commonly used in existing pavers and are fixedly connected in an existing manner to facilitate the addition of road materials and make paving easier.

[0026] Furthermore, the heating mechanism 7 includes a discharge pipe 701, with both ends of the discharge pipe 701 extending to both sides of the vehicle plate 1; the side of the discharge pipe 701 away from the vehicle plate 1 is as follows: Figure 8 As shown, it is set downwards; when setting the hopper, the lower part of the discharge pipe 701 is lower than the bottom surface of the hopper, which facilitates the movement of the discharge pipe 701.

[0027] Both ends of the discharge pipe 701 are welded with fixed pipes 5, which are preferably made of stainless steel and are located on both sides of the vehicle plate 1. The side of the fixed pipe 5 away from the discharge pipe 701 is connected to a feeding mechanism 6. The top of the fixed frame 102 is fixed with a storage box 4 by bolts, and the storage box 4 is connected to the feeding mechanism 6. The storage box 4 has a built-in heating structure, preferably an electric heating tube, with a heating temperature of not less than 80°C. The storage box 4 is used to store and heat the heating medium for preheating the road surface, preferably high-pressure high-temperature hot water. 10-30 spray pipes 702 are evenly welded on the side of the discharge pipe 701 away from the vehicle plate 1. The end of the spray pipe 702 is preferably equipped with a high-pressure spray nozzle, and the spray angle is preferably 30°-60°, so as to spray the high-temperature medium onto the road surface under high pressure to heat the road base and melt the frozen layer structure. The feeding mechanism 6 is used to send the heating medium in the storage box 4 into the discharge pipe 701 through the fixed pipe 5, and finally spray it onto the road surface through the spray pipes 702 to achieve the initial melting of the frozen layer.

[0028] Furthermore, 5-10 stainless steel connecting sleeves 703 are evenly welded to the bottom of the discharge pipe 701. Connecting rods 704 are welded to the bottom of each connecting sleeve 703, and the connecting rods 704 are horizontally positioned. A second connecting block 707 is welded to the side of the bottom of the connecting rod 704 away from the vehicle plate 1. The second connecting block 707 is hinged to a first connecting block 706 via a pin. Multiple first connecting blocks 706 are welded together to a movable plate 705. A groove is formed at the bottom of the movable plate 705, and 8-20 heating elements are evenly arranged within the groove. The component 709, preferably an electric heating wire or an electric heating tube, with a heating temperature preferably between 80-200℃, is used to continuously heat the road surface after spraying hot water to maintain the melting effect; the movable plate 705 is rotatably connected to 2-6 rollers 708 on the side near the vehicle plate 1 via bearings, which facilitates the movable plate 705 to adaptively adjust to the undulations of the road surface; several springs 710 are provided between the top of the movable plate 705 and the connecting rod 704 to buffer the impact caused by uneven road surface and ensure that the heating component 709 maintains a reasonable distance from the road surface.

[0029] During use, the material is first heated by a high-temperature and high-pressure medium, and then the temperature is maintained and further increased by the heating element 709 to facilitate subsequent road paving and ensure paving quality.

[0030] Furthermore, drive frames 3 are provided on both sides of the vehicle platform 1. The drive frames 3 are connected to the fixed pipe 5 and are used to drive the heating mechanism 7 to move closer to or away from the vehicle platform 1. Specifically, the drive frame 3 includes 2-5 vertical plates 301 welded to the vehicle platform 1. The vertical plates 301 are preferably made of Q355B steel. A fixed rod 302 is welded to the side of the vertical plate 301 away from the wheel 105. A fixed sleeve 303 is welded to the fixed rod 302. A telescopic rod 307 is welded to the fixed sleeve 303 on the same side. The telescopic rod 307 is preferably a hydraulic telescopic rod, preferably of model HT-500. A fixed plate 309 is welded to the telescopic end of the telescopic rod 307. A movable sleeve 304 is welded to the fixed plate 309. The movable sleeve 304 is movably sleeved onto the extension end of the telescopic rod 307. The retractable rod 307 and the fixed sleeve 303 are external; the movable sleeve 304 has a movable groove 308 on its side, through which the fixed rod 302 passes and can slide within the movable groove 308; a connecting buckle 305 is hinged to the outside of the movable sleeve 304 by a pin, the connecting buckle 305 has a semi-circular structure, and the connecting buckle 305 is fastened to the outside of the fixed tube 5; a threaded post is welded to the outside of the movable sleeve 304, the threaded post passes through one end of the connecting buckle 305, and is threadedly connected to a nut 306, and the fixed tube 5 is fixed to the drive frame 3 by tightening the nut 306.

[0031] By activating the telescopic rod 307, the fixed plate 309 can be moved, which in turn moves the movable sleeve 304, thereby moving the fixed pipe 5 connected to it, and finally moving the discharge pipe 701, so that the discharge pipe 701 moves closer to and further away from the paver 1. When not in use, the discharge pipe 701 is close to the paver 1 and does not occupy extra space. When in use, the discharge pipe 701 is away from the paver 1, so that the subgrade can be heated in front of the paver, and time for the frozen layer to thaw can be reserved to ensure the paving effect.

[0032] Furthermore, the feeding mechanism 6 includes a pump 604 located at the bottom of the vehicle plate 1, preferably a 3W-250 model; the input end of the pump 604 is connected to the bottom of the storage box 4 through the feed pipe 605; the output end of the pump 604 is welded with a connecting pipe 603, and the end of the fixed pipe 5 away from the discharge pipe 701 is connected to the connecting pipe 603 through a flexible hose 601, which is preferably a high-temperature and high-pressure resistant rubber hose; the flexible hose 601 is S-shaped with a reserved margin to accommodate the front and rear adjustment of the heating mechanism 7, and the end near the connecting pipe 603 is fixed to the vertical plate 301 through a fixing buckle 602 to prevent the flexible hose 601 from shaking randomly.

[0033] During high-pressure injection, the pump 604 generates fluid force, which sequentially sends the high-temperature medium in the storage tank 4 through the feed pipe 605, pump 604, hose 601 and fixed pipe 5 into the discharge pipe 701, and finally sprays it out through the injection pipe 702.

[0034] Example 2: A method for paving a frost-resistant base course for highways, using a frost-resistant base course paver, includes the following steps: S1: Construction preparation and equipment commissioning: Before construction, the paving area is surveyed. If the road surface is covered with ice and snow, a snowplow is used to remove the ice and snow to ensure that there is no obvious snow accumulation or large ice blocks on the base layer. Check the status of each component of the paver: Activate the heating structure of storage box 4 to heat the medium (preferably clean water or brine) in the box to 95-100℃ and keep it warm for later use; Check the extension and retraction functions of hydraulic cylinder 202 and telescopic rod 307 to ensure that the material distribution mechanism and heating mechanism 7 operate flexibly; test the rotation state of material distribution blade 205, the heating effect of heating element 709 and the pressure output of pump 604. When the paver travels to the paving start position, the extension rod 307 of the drive frame 3 extends, driving the heating mechanism 7 to extend away from the paver head; As needed, a hopper is bolted to the paver head, with the hopper's outlet aligned with the front of the material distribution mechanism, and road materials such as cement-stabilized soil and asphalt mixture are poured into the hopper.

[0035] S2: Road surface preheating and thawing of frozen layer: The pump 604 of the feeding mechanism 6 is started, and the high-pressure and high-temperature hot water in the storage tank 4 is sent into the discharge pipe 701 through the feed pipe 605, connecting pipe 603, hose 601, and fixed pipe 5. Finally, it is sprayed onto the road base layer through the high-pressure nozzle of the spray pipe 702. The hot water quickly melts the frozen layer after contacting it. Simultaneously activate the heating element 709 in the groove of the active plate 705, set the heating temperature to 120-200℃, and continuously heat the road surface after spraying hot water. The heating time is adjusted according to the thickness of the frozen layer to ensure that the frozen layer is completely melted and there are no residual ice blocks inside the base layer. During the heating process, the road surface temperature is monitored in real time by a PT100 temperature sensor installed at the bottom of the movable plate 705 of the paver. When the temperature is lower than the preset value, the temperature of the heating element 709 is increased, and the preset value is not less than 5°C.

[0036] S3: Simultaneous paving and material distribution: Start the paver's driving system and control the driving speed at 5-10 m / min, maintaining a constant speed. Open the discharge valve of the hopper, and the road raw material falls evenly onto the road surface. Start the reduction motor on the side of the material distribution frame 204 to drive the material distribution blade 205 to rotate, and evenly distribute the raw material onto the preheated road base. The paving thickness is controlled by adjusting the height of the movable box 203 and the material feeding speed through the hydraulic cylinder 202. During the paving process, staff members are assigned to observe the uniformity of the raw material paving in real time. By adjusting the rotation speed of the material distribution blades 205 or the speed of the paver, they ensure that the paving thickness is consistent and there are no local accumulations or gaps.

[0037] S4: Road surface compaction: The compaction cylinder 103 at the rear of the paver moves synchronously with the paver to initially compact the dispersed road material. The compaction pressure of the compaction cylinder 103 is adjusted by the paver's own weight and can be adjusted by adding counterweights to the fixed frame 102 to ensure that the material compaction degree meets the design requirements. The compaction cylinder 103 preferably has built-in electric heating elements. If the road material is asphalt mixture, the electric heating elements built into the compaction cylinder 103 can be used to assist in heat preservation after compaction to prevent the material from cooling down rapidly and affecting the compaction effect.

[0038] S5: Paving completion and equipment reset: After the paving area is completed, close the hopper discharge valve and continue driving the paver for 5-10m to ensure that the material distribution mechanism and compaction cylinder 103 complete the paving and compaction of the remaining material; Remove the hopper from the paver head, clean the residual material from the surfaces of the material distribution blades 205, compaction cylinder 103, and heating mechanism 7, and check for any damage to the components. The heating element 709 and pump 604 are turned off, and the heating mechanism 7 is returned to its initial position by retracting the telescopic rod 307 of the drive frame 3, thus completing the equipment reset. The paved road surface shall be maintained using existing methods. In high-altitude environments, the maintenance time shall be no less than 7 days. During the maintenance period, vehicles shall be avoided from running over the road surface to ensure that the road surface strength meets the standards.

[0039] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A road frost-resistant base course paver, characterized in that: Includes a car platform (1), and a car body (101) is provided on the top of the car platform (1); A fixed frame (102) is provided at one end of the vehicle platform (1), and a compaction cylinder (103) is provided at the bottom of the fixed frame (102), which is the tail of the paver and is used to compact the road surface; The other end of the vehicle plate (1) is equipped with a material distribution mechanism, which is the head of the paver and is used to evenly distribute the road surface material; The bottom of the vehicle board (1) is provided with a frame (104), and wheels (105) are provided on both sides of the frame (104). The head of the vehicle board (1) is equipped with a heating mechanism (7), which is used to preheat the road surface and reduce the impact of the frozen layer on the road paving.

2. The highway frost-resistant base course paver according to claim 1, characterized in that: The material distribution mechanism includes a connecting plate (201) that is fixedly connected to the car body (1); The top of the connecting plate (201) is provided with several hydraulic cylinders (202), and the output end of the hydraulic cylinders (202) is provided with a movable box (203), which is located below the connecting plate (201); The movable box (203) is equipped with several material distribution racks (204); The bottom of the material distribution rack (204) is provided with several material distribution blades (205); the material distribution blades (205) are driven by the motor structure on the side of the material distribution rack (204).

3. The highway frost-resistant base course paver according to claim 1, characterized in that: The heating mechanism (7) includes a discharge pipe (701), the two ends of which extend to both sides of the vehicle plate (1); Both ends of the discharge pipe (701) are provided with fixed pipes (5), which are located on both sides of the car plate (1); A feeding mechanism (6) is provided on the side of the fixed pipe (5) away from the discharge pipe (701); The top of the fixed frame (102) is provided with a storage box (4), which is connected to the feeding mechanism (6); the storage box (4) has a built-in heating structure and is used to store the heating medium for preheating the road surface; Several spray pipes (702) are provided on the side of the discharge pipe (701) away from the car plate (1). The feeding mechanism (6) is used to send the heating medium in the storage box (4) into the discharge pipe (701) through the fixed pipe (5), and finally spray it onto the road surface through the spray pipe (702).

4. The highway frost-resistant base course paver according to claim 3, characterized in that: The discharge pipe (701) is provided with several connecting sleeves (703), and the bottom of the connecting sleeve (703) is provided with a connecting rod (704); A second connecting block (707) is provided on the side of the bottom of the connecting rod (704) away from the vehicle plate (1), and the second connecting block (707) is hinged to the first connecting block (706). Several first connecting blocks (706) are connected together to a movable plate (705); The bottom of the movable plate (705) is provided with a groove, and several heating elements (709) are provided in the groove; The movable plate (705) is provided with several rollers (708) on the side near the vehicle plate (1); Several springs (710) are provided between the top of the movable plate (705) and the connecting rod (704).

5. The highway frost-resistant base course paver according to claim 3, characterized in that: Both sides of the vehicle plate (1) are provided with drive frames (3), and the drive frames (3) are connected to the fixed tube (5); The drive frame (3) is used to drive the heating mechanism (7) to approach or move away from the vehicle panel (1).

6. The highway frost-resistant base course paver according to claim 5, characterized in that: The drive frame (3) includes several vertical plates (301) that are fixedly connected to the vehicle plate (1); A fixing rod (302) is provided on the side of the vertical plate (301) away from the wheel (105), and a fixing sleeve (303) is provided on the fixing rod (302). The telescopic rod (307) is fixedly connected to the fixed sleeve (303) on the same side, and the telescopic end of the telescopic rod (307) is connected to the fixed tube (5).

7. The highway frost-resistant base course paver according to claim 6, characterized in that: The telescopic end of the telescopic rod (307) is fixed with a fixing plate (309), and the fixing plate (309) is fixed with a movable sleeve (304). The movable sleeve (304) is movably fitted onto the outside of the telescopic rod (307) and the fixed sleeve (303); The movable sleeve (304) has a movable groove (308) on its side, and the fixed rod (302) passes through the movable groove (308) and can slide within the movable groove (308); The movable sleeve (304) is hinged to the outside of the connecting buckle (305), and the connecting buckle (305) is fastened to the outside of the fixed tube (5); A threaded post is fixed to the outside of the movable sleeve (304). The threaded post passes through one end of the connecting buckle (305) and is threadedly connected to a nut (306).

8. A highway frost-resistant base course paver according to claim 6, characterized in that: The feeding mechanism (6) includes a pump (604) located at the bottom of the car body (1); The input end of the pump (604) is connected to the storage tank (4) through the feed pipe (605); The pump (604) has a connecting pipe (603) at its output end. The end of the fixed pipe (5) away from the discharge pipe (701) is connected to the connecting pipe (603) through a hose (601). The hose (601) is S-shaped, and one end near the connecting pipe (603) is fixed to the vertical plate (301) by a fixing buckle (602).

9. A method for paving a frost-heave-resistant base course for highways, characterized in that: The application of the highway frost-resistant base course paver according to any one of claims 1-8 includes the following steps: S1. When the paver travels to the paving position, the heating mechanism extends; S2. The heating mechanism heats the road base layer, melts the frozen layer, and raises the temperature of the base layer; S3: The paver moves slowly, and the road material is fed in synchronously. S4. The paver disperses and compacts the road surface material; S5, Paving completed.

10. The method for paving a highway frost-heave-resistant base course according to claim 9, characterized in that: in In S1, the heated structure extends and then the paver head connects to the hopper, into which road raw materials are poured and guided onto the roadbed. In S2, the road surface is first sprayed with a high-pressure, high-temperature medium. After spraying, the road surface is continuously heated to solve the freezing problem of the frost heave base layer, so that the subsequent paving is not affected by the frozen layer. If there is ice or snow covering the S1 section, remove the ice and snow first.

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