Highway subgrade widening structure

Abstract

This invention discloses a highway subgrade widening structure, relating to the field of subgrade widening technology. It includes a roadbed and a road slab. An old roadbed and a new roadbed are respectively provided on the top of the roadbed. A first water collection trough is installed inside the old roadbed, and a second water collection trough is installed inside the new roadbed. The inner cavities of the first and second water collection troughs form a filter chamber. Multiple water-filtering holes are opened on the top of both the old and new roadbeds, and these holes are connected to the filter chamber. A first filter screen is installed inside the filter chamber. The beneficial effect of this invention is that rainwater can penetrate the road slab and drain into the filter chamber through the multiple water-filtering holes. After being filtered by the first filter screen, impurities are trapped on the top of the first filter screen, and then discharged into a water storage tank for collection through a drain pipe. This provides strong drainage performance and prevents rainwater from seeping into the old and new roadbeds and causing structural damage.

Description

Technical Field

[0001] This invention relates to the field of roadbed widening technology, specifically to a roadbed widening structure for highways. Background Technology

[0002] In recent years, with my country's rapid economic development, both urban and rural construction have achieved unprecedented progress, and the supporting transportation network has become increasingly sophisticated. To cope with the ever-increasing volume of traffic, it is necessary to rebuild or upgrade previously constructed highways. When the road surface width is insufficient to meet usage demands, the roadbed needs to be widened.

[0003] The drainage effect of existing highway subgrade widening structures is poor, causing rainwater to seep into the interior of the new subgrade. Over time, this can easily damage the new subgrade. At the same time, the rainwater cannot be collected and recycled, reducing the functionality of the structure. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a highway roadbed widening structure, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a highway subgrade widening structure, comprising a roadbed and a road slab, wherein an old roadbed and a new roadbed are respectively provided on the top of the roadbed; a first water collection trough is installed inside the old roadbed, and a second water collection trough is installed inside the new roadbed; the inner cavities of the first and second water collection troughs form a filtration chamber; multiple water filtering holes are provided on the top of both the old and new roadbeds, and the multiple water filtering holes are connected to the filtration chamber; a first filter screen is installed inside the filtration chamber; a water storage tank is installed on the top of the roadbed; a water-separating plate is provided at the bottom of the inner cavity of the filtration chamber; a drain pipe is fixedly installed inside the new roadbed; the filtration chamber is connected to the water storage tank through the drain pipe; a sludge collection tank is installed on the top of the water storage tank; a spraying mechanism and a liquid delivery mechanism are respectively provided on the top of the sludge collection tank; a sewage discharge mechanism is provided inside the filtration chamber; and a driving mechanism is provided on the top of the water storage tank.

[0006] Optionally, the drive mechanism includes a motor fixed to the top of the water storage tank. The output end of the motor is fixedly connected to a second rotating shaft, and a fourth bevel gear is fixedly installed on the outer side of the second rotating shaft. The sewage discharge mechanism includes a third rotating shaft rotatably connected to a first water collection tank. A conveying auger is provided on the outer side of the third rotating shaft. A third bevel gear is fixedly connected to one end of the third rotating shaft, and the third bevel gear meshes with the fourth bevel gear. A sewage discharge port is provided inside the new roadbed. The filter chamber is connected to the sewage collection tank through the sewage discharge port. A second filter screen is installed inside the sewage collection tank. A connecting groove is provided at the bottom of the sewage collection tank, and the sewage collection tank is connected to the water storage tank through the connecting groove.

[0007] Optionally, a third connecting rod is slidably connected inside the sludge collection box. A scraper is fixedly connected to one end of the third connecting rod and located inside the sludge collection box. The bottom of the scraper contacts the top of the second filter screen. The other end of the third connecting rod extends to the outside of the sludge collection box and is connected to a pull ring. A sludge discharge channel is provided on one side of the sludge collection box, and a sealing cover is movably installed on one side of the sludge discharge channel.

[0008] Optionally, the spraying mechanism includes a support frame fixed to the top of the sludge collection tank. A nozzle is rotatably connected to the upper end of the support frame. A transmission rod is fixedly installed on one side of the nozzle. A sliding groove is formed on the outer side of the transmission rod. A slider is slidably connected inside the sliding groove. A first connecting rod is rotatably connected to one side of the slider. A square frame is fixedly connected to the lower end of the first connecting rod. A support is fixedly connected to one side of the support frame. A fourth rotating shaft is rotatably connected to one end of the support. A turntable is fixedly connected to one end of the fourth rotating shaft. An eccentric pin is fixedly installed on the outer side of the water storage tank, away from the center. A sixth bevel gear is fixedly connected to the other end of the fourth rotating shaft. A limit support is fixedly installed on the top of the sludge collection tank. A first rotating shaft is rotatably connected to the upper end of the limit support. A sixth bevel gear is fixedly connected to one end of the first rotating shaft. The sixth bevel gear meshes with a fifth bevel gear. A first bevel gear is fixedly connected to the other end of the first rotating shaft. A second bevel gear is fixedly connected to the upper end of the second rotating shaft. The first bevel gear meshes with the second bevel gear.

[0009] Optionally, the infusion mechanism includes a water tank, which is fixed to the top of the sludge collection tank. A second connecting rod is slidably connected inside the water tank. The upper end of the second connecting rod is fixedly connected to a square frame. A piston is fixedly installed at the lower end of the second connecting rod inside the water tank. A water pumping pipe and a flexible hose are fixedly connected to the outside of the water tank. One end of the flexible hose is fixedly connected to a nozzle. The water pumping pipe extends into the inner cavity of the water storage tank and is near the bottom.

[0010] Optionally, the road slab is fixed to the top of the old roadbed and the new roadbed by a shock-absorbing mechanism. The shock-absorbing mechanism includes a buffer pad, a telescopic spring and a damper. The buffer pad, the telescopic spring and the damper are fixed to the top of the old roadbed and the new roadbed, and the buffer pad, the telescopic spring and the damper are all fixedly connected to the road slab.

[0011] Optionally, the top of the water-blocking plate forms an angle of 15° with the horizontal direction, and the drainage pipe is fixed to the interior of the new roadbed with the left side higher than the right side.

[0012] Optionally, a stepped groove is provided between the old roadbed and the new roadbed, and multiple reinforcing steel bars are installed between the old roadbed and the new roadbed.

[0013] This invention provides a highway roadbed widening structure, which has the following beneficial effects:

[0014] 1. The roadbed widening structure of this highway allows rainwater to penetrate the road slab and be discharged into the interior of the filter chamber through multiple filter holes. After being filtered by the first filter screen, impurities are trapped at the top of the first filter screen. Then, the water is discharged into the interior of the water storage tank through the drain pipe for collection. It has strong drainage performance and prevents rainwater from penetrating into the interior of the old and new roadbeds and causing structural damage.

[0015] 2. The roadbed widening structure of this highway, through the set drive mechanism, drives the spraying mechanism to work, causing the nozzles to swing back and forth, and controls the liquid delivery mechanism to work, so that the rainwater collected inside the water storage tank is discharged through the nozzles to wash the soil on the road surface. It can utilize the collected rainwater and effectively reduce dust on the road surface during dry periods, thus improving functionality.

[0016] 3. The roadbed widening structure of this highway drives the sewage discharge mechanism while the driving mechanism is working, causing the third rotating shaft and the outer conveying auger to rotate, thereby transporting the impurities trapped on the surface of the first filter screen through the sewage outlet to the inside of the sewage collection box, which can prevent the first filter screen from becoming clogged and improve drainage efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a partial cross-sectional view of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the old roadbed of the present invention;

[0020] Figure 4 This is a schematic diagram of the scraper structure of the present invention;

[0021] Figure 5 For the present invention Figure 1Enlarged view of point A in the middle;

[0022] Figure 6 For the present invention Figure 1 Enlarged view at point B in the middle;

[0023] Figure 7 For the present invention Figure 1 Enlarged view of point C in the middle.

[0024] In the diagram: 1. Roadbed; 2. Old roadbed; 3. New roadbed; 4. Stepped trough; 5. Reinforcing steel; 6. First water collection trough; 7. Filter chamber; 8. Second water collection trough; 9. Buffer pad; 10. Road slab; 11. First filter screen; 12. Water-blocking plate; 13. Conveying auger; 14. Filter hole; 15. Drainage pipe; 16. Sewage outlet; 17. First shaft; 18. First bevel gear; 19. Second bevel gear; 20. Second shaft; 21. Third bevel gear; 22. Fourth bevel gear; 23. Motor; 24. Pumping pipe; 25. Third shaft; 26. Water storage tank; 27. Sewage collection tank 28. Support frame; 29. ​​Nozzle; 30. Transmission rod; 31. Slider; 32. Slide groove; 33. First connecting rod; 34. Square frame; 35. Eccentric pin; 36. Turntable; 37. Second connecting rod; 38. Support; 39. Water tank; 40. Piston; 41. Hose; 42. Third connecting rod; 43. Pull ring; 44. Drainage channel; 45. Sealing cover; 46. Second filter screen; 47. Connecting channel; 48. Telescopic spring; 49. Damper; 50. Scraper; 51. Fourth rotating shaft; 52. Fifth bevel gear; 53. Sixth bevel gear; 54. Limiting support seat. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Please see Figures 1 to 7This invention provides a technical solution: a highway subgrade widening structure, including a roadbed 1 and a road slab 10. An old roadbed 2 and a new roadbed 3 are respectively installed on the top of the roadbed 1. A first water collection trough 6 is installed inside the old roadbed 2, and a second water collection trough 8 is installed inside the new roadbed 3. The inner cavities of the first water collection trough 6 and the second water collection trough 8 form a filter chamber 7. Multiple filter holes 14 are opened on the top of both the old roadbed 2 and the new roadbed 3, and all the filter holes 14 are connected to the filter chamber 7. A first filter screen 11 is installed inside the filter chamber 7. A water storage tank 26 is installed on the top of the roadbed 1. A water-blocking plate 12 is installed at the bottom of the inner cavity of the filter chamber 7. A drain pipe 15 is fixedly installed inside the new roadbed 3. The filter chamber 7 is connected to the water storage tank 26 through the drain pipe 15. The system is interconnected, allowing rainwater to penetrate the road slab 10 and drain into the filter chamber 7 through multiple filter holes 14. After being filtered by the first filter screen 11, impurities are trapped on the top of the first filter screen 11. Then, the water is drained into the water storage tank 26 for collection through the drain pipe 15. This system has strong drainage performance, preventing rainwater from seeping into the old roadbed 2 and the new roadbed 3 and causing structural damage. A sludge collection tank 27 is installed on the top of the water storage tank 26 to collect the impurities trapped on the surface of the first filter screen 11. A spraying mechanism and a liquid delivery mechanism are respectively installed on the top of the sludge collection tank 27. A sewage discharge mechanism is installed inside the filter chamber 7. A drive mechanism is installed on the top of the water storage tank 26 to drive the spraying mechanism, the liquid delivery mechanism, and the sewage discharge mechanism.

[0027] The drive mechanism includes a motor 23, which is fixed to the top of the water storage tank 26. A second rotating shaft 20 is fixedly connected to the output end of the motor 23. A fourth bevel gear 22 is fixedly installed on the outer side of the second rotating shaft 20. The sewage discharge mechanism includes a third rotating shaft 25, which is rotatably connected to the first water collection tank 6. A conveying auger 13 is installed on the outer side of the third rotating shaft 25. A third bevel gear 21 is fixedly connected to one end of the third rotating shaft 25, and the third bevel gear 21 meshes with the fourth bevel gear 22. A sewage discharge port 16 is provided inside the new roadbed 3. The filter chamber 7 is connected to the sewage collection tank 27 through the sewage discharge port 16. While the second rotating shaft 20 rotates, the third bevel gear... Under the meshing connection of wheel 21 and fourth bevel gear 22, the third rotating shaft 25 and the outer conveying auger 13 rotate, thereby transporting the impurities intercepted on the surface of the first filter screen 11 to the inside of the sludge collection tank 27 through the drain port 16. This prevents the first filter screen 11 from becoming clogged and improves drainage efficiency. The inside of the sludge collection tank 27 is equipped with a second filter screen 46. The water contained in the impurities inside the sludge collection tank 27 is filtered by the second filter screen 46 and discharged into the inner cavity of the water storage tank 26 through the connecting groove 47, thus realizing solid-liquid separation of impurities. The bottom of the sludge collection tank 27 is provided with a connecting groove 47, and the sludge collection tank 27 is connected to the water storage tank 26 through the connecting groove 47.

[0028] The sludge collection box 27 is internally slidably connected to a third connecting rod 42. One end of the third connecting rod 42 is fixedly connected to a scraper 50 within the inner cavity of the sludge collection box 27. The bottom of the scraper 50 contacts the top of the second filter screen 46. The other end of the third connecting rod 42 extends to the outside of the sludge collection box 27 and is connected to a pull ring 43. A drain channel 44 is provided on one side of the sludge collection box 27. A sealing cover 45 is movably installed on one side of the drain channel 44. By opening the sealing cover 45 and pulling the pull ring 43, the third connecting rod 42 is moved, and the scraper 50 is used to discharge impurities on the surface of the second filter screen 46 to the outside through the drain channel 44.

[0029] The spraying mechanism includes a support frame 28, which is fixed to the top of the sludge collection tank 27. A nozzle 29 is rotatably connected to the upper end of the support frame 28. A transmission rod 30 is fixedly installed on one side of the nozzle 29. A groove 32 is provided on the outer side of the transmission rod 30. A slider 31 is slidably connected inside the groove 32. A first connecting rod 33 is rotatably connected to one side of the slider 31. A square frame 34 is fixedly connected to the lower end of the first connecting rod 33. A support 38 is fixedly connected to one side of the support frame 28. A fourth rotating shaft 51 is rotatably connected to one end of the support 38. A turntable 36 is fixedly connected to one end of the fourth rotating shaft 51. An eccentric pin 35 is fixedly installed on the outer side of the water tank 26, away from the center. A sixth bevel gear 53 is fixedly connected to the other end of the fourth rotating shaft 51. A limit support 54 is fixedly installed on the top of the sludge collection tank 27. The upper end of the limit support 54 rotates... A first rotating shaft 17 is connected, with a sixth bevel gear 53 fixedly connected to one end of the first rotating shaft 17. The sixth bevel gear 53 meshes with the fifth bevel gear 52. The other end of the first rotating shaft 17 is fixedly connected to a first bevel gear 18. The upper end of the second rotating shaft 20 is fixedly connected to a second bevel gear 19. The first bevel gear 18 meshes with the second bevel gear 19. Through the set drive mechanism, the second rotating shaft 20 is controlled to rotate by the motor 23. Under the action of the meshing connection between the second bevel gear 19 and the first bevel gear 18, the first rotating shaft 17 rotates. Then, under the action of the meshing connection between the sixth bevel gear 53 and the fifth bevel gear 52, the turntable 36 and the outer eccentric pin 35 rotate, thereby driving the first connecting rod 33 to move up and down reciprocally, causing the slider 31 to slide inside the slide groove 32, and causing the nozzle 29 to swing back and forth.

[0030] The infusion mechanism includes a water tank 39, which is fixed to the top of the sludge collection tank 27. A second connecting rod 37 is slidably connected inside the water tank 39. The upper end of the second connecting rod 37 is fixedly connected to the square frame 34, and a piston 40 is fixedly installed at the lower end of the second connecting rod 37 inside the water tank 39. A water suction pipe 24 and a hose 41 are fixedly connected to the outside of the water tank 39. Both the water suction pipe 24 and the hose 41 are equipped with one-way valves to prevent water inside the nozzle 29 from flowing back into the water tank 39 through the hose 41. To prevent water from being discharged from the water tank 39 through the water pipe 24, one end of the hose 41 is fixedly connected to the nozzle 29. The water pipe 24 extends into the inner cavity of the water storage tank 26 and is close to the bottom. While the turntable 36 rotates, the piston 40 is reciprocated inside the water tank 39 by the second connecting rod 37, thereby discharging the rainwater collected inside the water storage tank 26 through the nozzle 29 to wash the mud on the surface of the road slab 10. The collected rainwater can be utilized to effectively reduce dust on the road surface during dry periods, thus improving functionality.

[0031] The road slab 10 is fixed to the top of the old roadbed 2 and the new roadbed 3 by a shock absorption mechanism. The shock absorption mechanism includes a buffer pad 9, a telescopic spring 48 and a damper 49. The buffer pad 9, the telescopic spring 48 and the damper 49 are fixed to the top of the old roadbed 2 and the new roadbed 3. The buffer pad 9, the telescopic spring 48 and the damper 49 are all fixedly connected to the road slab 10. Through the cooperation of the buffer pad 9, the telescopic spring 48 and the damper 49, an effective buffering and shock absorption effect can be achieved.

[0032] The top of the water-blocking plate 12 forms an angle of 15° with the horizontal direction, and the drain pipe 15 is fixed to the inside of the new roadbed 3 with the left side higher than the right side, so that the rainwater inside the filter chamber 7 can quickly approach the drain pipe 15 and be discharged into the water storage tank 26 through the drain pipe 15.

[0033] Among them, a stepped groove 4 is set between the old roadbed 2 and the new roadbed 3, and multiple reinforcing steel bars 5 are installed between the old roadbed 2 and the new roadbed 3. The reinforcing steel bars 5 are pre-embedded between the old roadbed 2 and the new roadbed 3, making the connection between the old roadbed 2 and the new roadbed 3 tighter.

[0034] In summary, this highway roadbed widening structure allows rainwater to penetrate the road slab 10 and flow through multiple filter holes 14 into the filter chamber 7. After being filtered by the first filter screen 11, impurities are trapped at the top of the first filter screen 11. Then, the water is discharged through the drain pipe 15 into the water storage tank 26 for collection. Furthermore, the drive mechanism, using a motor 23, controls the rotation of the second rotating shaft 20. The meshing of the second bevel gear 19 with the first bevel gear 18 causes the first rotating shaft 17 to rotate. The meshing of the sixth bevel gear 53 with the fifth bevel gear 52 causes the turntable 36 and the outer eccentric pin 35 to rotate, thereby driving the first connecting rod 33 to move up and down reciprocally. This causes the slider 31 to slide inside the groove 32, causing the nozzle 29 to oscillate back and forth. Simultaneously, the turntable 36 rotates, utilizing the second... The connecting rod 37 causes the piston 40 to reciprocate inside the water tank 39, thereby discharging the rainwater collected inside the water storage tank 26 through the nozzle 29 to wash the mud on the surface of the road slab 10. The washed water can then be discharged back into the filter chamber 7 for filtration before being discharged into the water storage tank 26. While the second rotating shaft 20 is rotating, the meshing connection between the third bevel gear 21 and the fourth bevel gear 22 causes the third rotating shaft 25 and the outer conveying auger 13 to rotate, thereby conveying the impurities trapped on the surface of the first filter screen 11 through the drain port 16 to the inside of the sludge collection tank 27. This prevents the first filter screen 11 from becoming clogged and improves drainage efficiency. Furthermore, by opening the sealing cover 45 and pulling the pull ring 43, the third connecting rod 42 can be moved, and the scraper 50 can be used to discharge the impurities on the surface of the second filter screen 46 to the outside through the drain channel 44.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A highway subgrade widening structure, comprising a roadbed (1) and a road slab (10), characterized in that: The top of the roadbed (1) is provided with an old roadbed (2) and a new roadbed (3). The old roadbed (2) is equipped with a first water collection trough (6), and the new roadbed (3) is equipped with a second water collection trough (8). The inner cavities of the first water collection trough (6) and the second water collection trough (8) form a filter cavity (7). The top of the old roadbed (2) and the new roadbed (3) are provided with multiple water filter holes (14), and the multiple water filter holes (14) are connected to the filter cavity (7). The filter cavity (7) is equipped with a first filter screen (11). A water storage tank (26) is installed on the top of the roadbed (1). A water baffle plate (12) is provided at the bottom of the inner cavity of the filter chamber (7). A drain pipe (15) is fixedly installed inside the new roadbed (3). The filter chamber (7) is connected to the water storage tank (26) through the drain pipe (15). A sludge collection tank (27) is installed on the top of the water storage tank (26). A spraying mechanism and a liquid delivery mechanism are respectively provided on the top of the sludge collection tank (27). A sewage discharge mechanism is provided in the inner cavity of the filter chamber (7). A driving mechanism is provided on the top of the water storage tank (26). The driving mechanism includes a motor (23), which is fixed to the top of the water storage tank (26). The output end of the motor (23) is fixedly connected to a second rotating shaft (20). A fourth bevel gear (22) is fixedly installed on the outside of the second rotating shaft (20). The sewage discharge mechanism includes a third rotating shaft (25), which is rotatably connected to the first water collection tank (6). A conveying auger (13) is provided on the outside of the third rotating shaft (25). One end of the third rotating shaft (25) A third bevel gear (21) is fixedly connected, and the third bevel gear (21) meshes with the fourth bevel gear (22). A sewage outlet (16) is opened inside the new roadbed (3). The filter chamber (7) is connected to the sewage collection box (27) through the sewage outlet (16). A second filter screen (46) is installed inside the sewage collection box (27). A connecting groove (47) is opened at the bottom of the sewage collection box (27). The sewage collection box (27) is connected to the water storage tank (26) through the connecting groove (47).

2. The highway subgrade widening structure according to claim 1, characterized in that: The sludge collection box (27) is slidably connected to a third connecting rod (42). One end of the third connecting rod (42) is fixedly connected to a scraper (50) in the inner cavity of the sludge collection box (27). The bottom of the scraper (50) contacts the top of the second filter screen (46). The other end of the third connecting rod (42) extends to the outside of the sludge collection box (27) and is connected to a pull ring (43). A drain channel (44) is provided on one side of the sludge collection box (27). A sealing cover (45) is movably installed on one side of the drain channel (44).

3. The highway subgrade widening structure according to claim 1, characterized in that: The spraying mechanism includes a support frame (28), which is fixed to the top of the sludge collection box (27). A nozzle (29) is rotatably connected to the upper end of the support frame (28). A transmission rod (30) is fixedly installed on one side of the nozzle (29). A sliding groove (32) is provided on the outer side of the transmission rod (30). A slider (31) is slidably connected inside the sliding groove (32). A first connecting rod (33) is rotatably connected to one side of the slider (31). A square frame (34) is fixedly connected to the lower end of the first connecting rod (33). A support (38) is fixedly connected to one side of the support frame (28). A fourth rotating shaft (51) is rotatably connected to one end of the support (38). A turntable (34) is fixedly connected to one end of the fourth rotating shaft (51). 6) An eccentric pin (35) is fixedly installed on the outside of the water storage tank (26) and away from the center. The other end of the fourth rotating shaft (51) is fixedly connected to the sixth bevel gear (53). The top of the sludge collection tank (27) is fixedly installed with a limiting support seat (54). The upper end of the limiting support seat (54) is rotatably connected to the first rotating shaft (17). One end of the first rotating shaft (17) is fixedly connected to the sixth bevel gear (53). The sixth bevel gear (53) meshes with the fifth bevel gear (52). The other end of the first rotating shaft (17) is fixedly connected to the first bevel gear (18). The upper end of the second rotating shaft (20) is fixedly connected to the second bevel gear (19). The first bevel gear (18) meshes with the second bevel gear (19).

4. The highway subgrade widening structure according to claim 1, characterized in that: The infusion mechanism includes a water tank (39), which is fixed to the top of the sludge collection tank (27). A second connecting rod (37) is slidably connected inside the water tank (39). The upper end of the second connecting rod (37) is fixedly connected to a square frame (34). A piston (40) is fixedly installed at the lower end of the second connecting rod (37) inside the water tank (39). A water pumping pipe (24) and a hose (41) are fixedly connected to the outside of the water tank (39). One end of the hose (41) is fixedly connected to the nozzle (29). The water pumping pipe (24) extends into the inner cavity of the water storage tank (26) and is close to the bottom.

5. A highway subgrade widening structure according to claim 1, characterized in that: The road slab (10) is fixed to the top of the old roadbed (2) and the new roadbed (3) by a shock-absorbing mechanism. The shock-absorbing mechanism includes a buffer pad (9), a telescopic spring (48) and a damper (49). The buffer pad (9), the telescopic spring (48) and the damper (49) are fixed to the top of the old roadbed (2) and the new roadbed (3). The buffer pad (9), the telescopic spring (48) and the damper (49) are all fixedly connected to the road slab (10).

6. The highway subgrade widening structure according to claim 1, characterized in that: The top of the water-blocking plate (12) forms an angle of 15° with the horizontal direction, and the drainage pipe (15) is fixed to the interior of the new roadbed (3) with the left side higher than the right side.

7. A highway subgrade widening structure according to claim 1, characterized in that: A stepped groove (4) is provided between the old roadbed (2) and the new roadbed (3), and multiple reinforcing steel bars (5) are installed between the old roadbed (2) and the new roadbed (3).

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