A highway bridge subgrade pavement structure and construction method thereof

Abstract

The present application relates to the technical field of highway construction, and in particular to a highway bridge subgrade pavement structure and a construction method thereof, which comprises a cushion layer, a base layer and a surface layer, wherein a support base is arranged in the cushion layer, a plurality of buffer plates are arranged on the top surface of the support base, a plurality of the buffer plates are arranged on the top surface with water seepage plates, the base layer is arranged on the top surface of the water seepage plates, the surface layer is arranged on the top surface of the base layer, and the support base is respectively provided with support mechanisms for supporting the plurality of the buffer plates. The present application has the effect of increasing the service life of asphalt roads.

Description

Technical Field

[0001] The present application relates to the technical field of highway construction, and in particular to a highway bridge subgrade and pavement structure and a construction method thereof. Background Art

[0002] Highway engineering refers to the survey, measurement, design, construction, maintenance, and management of highway structures. Highway engineering structures include: roadbed, pavement, bridges, culverts, tunnels, drainage systems, safety protection facilities, greening and traffic monitoring facilities, as well as houses, workshops, and other service facilities used for construction, maintenance, and monitoring.

[0003] The roadbed and pavement of highway bridges are mostly paved with asphalt roads or concrete roads. The current asphalt roads are structurally divided into surface layer, base layer and cushion layer. The cushion layer is paved with crushed stone or natural gravel, and is mainly responsible for drainage, heat insulation and load-bearing; the base layer is a water-stabilizing layer, which shares the load-bearing of the road surface with the cushion layer; the surface layer is an asphalt layer, which has the advantages of good flatness, good bearing capacity, anti-skid and wear resistance.

[0004] However, since the cushion layer is paved with crushed stone or natural gravel, when a continuous stream of vehicles travel on the roadbed and pavement of the highway bridge, the long-term squeezing of the road surface by the vehicles can easily cause the crushed stone or natural gravel to loosen, causing damage to the load-bearing structure of the cushion layer, and then causing the asphalt layer to burst and rupture, seriously affecting the service life of the asphalt road. Summary of the invention

[0005] In order to increase the service life of asphalt roads, the present application provides a highway bridge subgrade and pavement structure and a construction method thereof.

[0006] In the first aspect, the present application provides a highway bridge subgrade and pavement structure, which adopts the following technical solution:

[0007] A highway bridge subgrade pavement structure comprises a cushion layer, a base layer and a surface layer, wherein a support base is arranged in the cushion layer, a plurality of buffer plates are arranged on the top surface of the support base, a plurality of buffer plates are arranged on the top surfaces, the base layer is arranged on the top surface of the water seepage plate, the surface layer is arranged on the top surface of the base layer, and the support base is respectively provided with support mechanisms for supporting the plurality of buffer plates.

[0008] By adopting the above technical solution, when it is necessary to pave an asphalt road, first, a support base is fixedly installed on the roadbed, and then multiple buffer plates are installed respectively through the support mechanism, and then a seepage plate is jointly covered on the top surface of the multiple buffer plates, and finally the base layer and the surface layer are laid in sequence. When the surface layer is squeezed by a vehicle, the squeezing force is sequentially transmitted through the base layer and the seepage plate, and then to the buffer plate. At this time, the support mechanism buffers the squeezing force. At the same time, under the action of the support mechanism, the buffer plate finally supports the surface layer, which is beneficial to reduce damage to the load-bearing structure, reduce the slurry and rupture of the asphalt layer, and increase the service life of the asphalt road.

[0009] Optionally, the support base includes a support frame and a water storage frame, the support frame and the water storage frame are spaced apart, a buffer frame is provided on the top surface of the support frame, the buffer plate abuts against the top surface of the buffer frame, a connecting component is provided between the support frame and the water storage frame, and the support mechanism is provided in the support frame.

[0010] By adopting the above technical solution, when it is necessary to install the support base, the support mechanisms are first installed in multiple support frames respectively, and then the support frames and water storage frames are fixedly connected in an interval manner through connecting components in turn. The support frame is conducive to providing support for the surface layer to buffer the squeezing force of the vehicle, and the water storage frame is conducive to reducing the accumulation of water on the surface layer. The accumulated water is temporarily stored in the water storage frame and then discharged into the groundwater system. At the same time, the water storage frame supports the surface layer, which is conducive to improving the stability of the surface layer supported by the support base.

[0011] Optionally, the support mechanism includes a top rod, which is arranged on the bottom surface of the buffer plate, and oblique rods are hingedly provided at both ends of the top rod, and a sliding rod is hingedly provided at one end of the oblique rod facing away from the top rod, a sliding groove is provided on the inner side of the support frame, the sliding rod is slidably connected to the sliding groove, one end of the sliding rod is provided with rubber, and the support frame is provided with a leveling component for leveling the buffer plate.

[0012] By adopting the above technical solution, when the surface layer is subjected to the extrusion pressure of the vehicle, the extrusion pressure is finally pressed toward the buffer plate. At this time, the buffer plate squeezes the buffer frame downward, and at the same time, the buffer plate drives the top rod to press down. The top rod presses the slide bar downward through the inclined rod, and causes the slide bar to squeeze the rubber in the slide groove. Since the buffer frame and rubber have the ability to deform, the buffer frame and the rubber jointly absorb the extrusion pressure, and automatically restore the shape after the extrusion pressure is eliminated, which is beneficial to increase the support base to buffer the extrusion pressure, and improve the stability of the asphalt road service life.

[0013] Optionally, the leveling assembly includes an adjusting member, an adjusting thread groove is provided on the outer side of the support frame, the adjusting member is threadedly connected to the adjusting thread groove, one end of the adjusting member extends into the slide groove, and a stop block is rotatably provided at one end of the adjusting member, and the stop block abuts against the rubber.

[0014] By adopting the above technical solution, when the adjusting member is rotated, the adjusting member drives the stop block to move toward the rubber through the thread, and is pressed against the rubber through the stop block; when the buffer plate is tilted during initial installation, or the buffer frame is partially damaged, the buffer plate can be leveled by rotating the adjusting member and finally moving the sliding rod, so that the buffer plate is finally placed horizontally on the top surface of the buffer frame, thereby ensuring that the force on the buffer plate is stable.

[0015] Optionally, the connecting component includes a connecting column, and the end corners of the support frame and the water storage frame are respectively provided with a clearance groove, the connecting column is plugged into the clearance groove, a card block is arranged in the clearance groove, and the side wall of the connecting column is correspondingly provided with a card slot, and the card block is plugged into the card slot.

[0016] By adopting the above technical solution, when the support frame and the water storage frame need to be fixed to each other, first align the card block and insert it into the card slot. At this time, the connecting column is inserted into the yield groove of the support frame and the water storage frame. Under the connecting action of the connecting column, the support frame and the water storage frame are fixed to each other, which is beneficial to reduce the looseness of the support frame and the water storage frame and improve the stability of the support base.

[0017] Optionally, the support frame is provided with a heat dissipation hole, a blocking block is provided at the outer end of the heat dissipation hole, and the support frame is provided with an opening and closing component for driving the blocking block to move.

[0018] By adopting the above technical solution, when the heat dissipation hole is opened by the opening and closing component, the heat in the support frame can be dissipated to the outside of the support frame through the heat dissipation hole, thereby reducing the overall temperature of the cushion layer.

[0019] Optionally, the opening and closing assembly includes a push rod, which slides in the heat dissipation hole, one end of the push rod is connected to the blocking block, the other end of the push rod is provided with a first wedge surface, the bottom surface of the push rod is provided with a pressure rod, the end of the pressure rod away from the push rod is provided with a second wedge surface, the first wedge surface cooperates with the second wedge surface, and the support frame is provided with a reset member for cooperating with the movement of the push rod.

[0020] By adopting the above technical solution, when the push rod is pressed down, the push rod drives the pressure rod to be pressed down, and under the action of the first wedge surface and the second wedge surface, the pressure rod drives the push rod to push outward, so that the push rod separates the block from the heat dissipation hole, and the heat is then dissipated from the heat dissipation hole to the outside of the support frame. When the extrusion force is eliminated, the reset member finally closes the block to the heat dissipation hole, and this is repeated. The block acts as a piston, which is beneficial to accelerate the dissipation of heat in the support frame to the outside of the support frame.

[0021] Optionally, the reset member is a spring, which is sleeved on the side wall of the push rod, and the side wall of the push rod is ring-shaped with a limiting member, one end of the spring abuts against the limiting member, and the other end of the spring abuts against the inner wall of the support frame.

[0022] By adopting the above technical solution, when the push rod is pushed outward, the push rod compresses the spring through the limiter, and when the squeezing force is eliminated, the spring releases the elastic force and resets, which is beneficial to improve the stability of the fit between the first wedge surface and the second wedge surface.

[0023] Optionally, a crushed stone and colloid mixed layer is provided in the water storage frame.

[0024] By adopting the above technical solution, when the extrusion force is applied to the top of the water storage frame, the crushed stone and rubber particle mixed layer is conducive to providing support for the surface layer under the enclosure of the water storage frame. When the accumulated water penetrates into the water storage frame, the accumulated water is temporarily stored in the gaps of the crushed stone and rubber particle mixed layer, which does not affect the supporting capacity of the cushion layer and is conducive to reducing the accumulation of water on the surface layer.

[0025] A highway bridge roadbed and pavement construction method comprises the following steps:

[0026] Lay the cushion layer, clean the roadbed, install the support mechanism on multiple support frames respectively, and make the buffer plate abut against the top surface of the buffer frame through the leveling assembly;

[0027] The plurality of support frames and the plurality of water storage frames are sequentially installed at intervals on the roadbed, and the plurality of support frames and the plurality of water storage frames are fixedly connected by connecting components, and at the same time, a crushed stone-rubber mixed layer is filled into the plurality of water storage frames;

[0028] After the cushion layer is laid, a seepage board is installed on the top surface of the cushion layer;

[0029] Lay the base layer and wait for it to solidify;

[0030] Lay the surface layer and wait for it to solidify to complete the construction of the highway bridge subgrade and pavement.

[0031] In summary, this application includes the following beneficial technical effects:

[0032] When it is necessary to lay an asphalt road, first a support base is fixedly installed on the roadbed, and then a plurality of buffer plates are installed respectively through the support mechanism, and then a seepage plate is jointly covered on the top surface of the plurality of buffer plates, and finally the base layer and the surface layer are laid in sequence. When the surface layer is squeezed by a vehicle, the squeezing force is sequentially transmitted through the base layer and the seepage plate, and then to the buffer plate. At this time, the support mechanism buffers the squeezing force. At the same time, under the action of the support mechanism, the buffer plate finally supports the surface layer, which is beneficial to reduce damage to the load-bearing structure, reduce slurry rupture and cracking of the asphalt layer, and increase the service life of the asphalt road. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the roadbed and pavement structure of the highway bridge of the present application;

[0034] Figure 2 It is a schematic diagram of the connection between the water seepage plate and the support pad of the present application;

[0035] Figure 3 It is a schematic diagram of the connection between the support frame and the water storage frame of the present application;

[0036] Figure 4 It is a structural schematic diagram of the support frame and the support mechanism of the present application;

[0037] Figure 5 is a cross-sectional view of the buffer plate and the support frame of the present application;

[0038] Figure 6 It is a cross-sectional view of the support frame and the buffer frame of the present application.

[0039] Explanation of the reference numerals in the accompanying drawings: 1. cushion layer; 2. base layer; 3. surface layer; 4. support base; 5. buffer plate; 6. seepage plate; 7. support frame; 8. water storage frame; 9. embedding groove; 10. buffer frame; 11. connecting column; 12. give way groove; 13. block; 14. slot; 15. push rod; 16. inclined rod; 17. slide rod; 18. slide groove; 19. rubber; 20. adjustment member; 21. adjustment thread groove; 22. stop block; 23. heat dissipation hole; 24. blocking block; 25. push rod; 26. first wedge surface; 27. second wedge surface; 28. pressure rod; 29. ​​spring; 30. limit member; 31. crushed stone and rubber mixed layer. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-6 This application is described in further detail.

[0041] Example:

[0042] See also Figure 1 and Figure 2 A roadbed pavement structure for a highway bridge includes a cushion layer 1, a base layer 2 and a surface layer 3. The cushion layer 1 mainly plays the role of pavement drainage and load bearing; the base layer 2 is a water-stabilizing layer, which plays the role of pavement load bearing together with the cushion layer 1; the surface layer 3 is an asphalt layer, which has good flatness, bearing capacity, skid resistance and wear resistance.

[0043] A support base 4 is installed in the cushion layer 1, and a buffer plate 5 is installed on the top surface of the support base 4. The number of buffer plates 5 is set to multiple, and the multiple buffer plates 5 are used to buffer the extrusion force of the vehicle. A water seepage plate 6 is installed on the top surface of the multiple buffer plates 5, the base layer 2 is fixedly installed on the top surface of the water seepage plate 6, and the surface layer 3 is fixedly installed on the top surface of the base layer 2. The support base 4 is installed with a support mechanism corresponding to the number of buffer plates 5, and the support mechanism is used to provide support for the buffer plates 5.

[0044] When a vehicle travels on the surface layer 3, the extrusion pressure of the vehicle wheels first acts on the surface layer 3, and the extrusion pressure is transmitted to the support base 4 through the base layer 2 and the permeable plate 6 in turn. At this time, under the action of the supporting mechanism, the buffer plate 5 buffers the extrusion pressure of the vehicle wheels, thereby reducing the damage of the load-bearing mechanism of the cushion layer 1 and improving the service life of the cleared road.

[0045] For details, see Figure 2 The support base 4 includes a support frame 7 and a water storage frame 8. The number of the support frame 7 and the water storage frame 8 is multiple, and the multiple support frames 7 and the water storage frames 8 are installed at intervals. The top surface of the support frame 7 is provided with an embedding groove 9, and a buffer frame 10 is fixedly installed in the embedding groove 9. The main material of the buffer frame 10 is hard rubber, which has the functions of support and deformation. The buffer plate 5 abuts against the top surface of the buffer frame 10.

[0046] See also Figure 2 and Figure 3 In order to facilitate the connection and fixation between the support frame 7 and the water storage frame 8, a connection assembly is installed between the support frame 7 and the water storage frame 8, and the connection assembly includes a connection column 11. The four end corners of the support frame 7 and the water storage frame 8 are respectively provided with a clearance groove 12, and the support frame 7 and the water storage frame 8 are abutted against the side wall of the connection column 11 through the clearance groove 12, and at the same time, a gap is left between the support frame 7 and the water storage frame 8. A clamping block 13 is fixed in the clearance groove 12, and the cross section of the clamping block 13 is T-shaped. A clamping groove 14 is provided on the side wall of the connection column 11 corresponding to the position of the clamping block 13, and the clamping block 13 is plugged into the clamping groove 14.

[0047] When the support frame 7 and the water storage frame 8 need to be connected and fixed to each other, the support frame 7 and the water storage frame 8 are firstly spaced apart, and then the clamping blocks 13 on the support frame 7 and the water storage frame 8 are respectively inserted into the clamping grooves 14 on the connecting column 11. Under the action of the connecting column 11, the support frame 7 and the water storage frame 8 are fixed to each other and are not loose.

[0048] For details, see Figure 4 and Figure 5, the support mechanism is installed in the support frame 7, and the support mechanism includes a top rod 15. In this embodiment, there are three top rods 15, and the three top rods 15 are respectively fixedly connected to the bottom surface of the buffer plate 5. The two ends of the top rod 15 are hinged with an inclined rod 16, and the end of the inclined rod 16 away from the top rod 15 is hinged with a sliding rod 17. A sliding groove 18 is provided on the inner side of the support frame 7, and the sliding rod 17 is horizontally arranged, and the sliding rod 17 is slidably connected to the sliding groove 18. Among them, a rubber 19 is fixed to the end of the sliding rod 17 away from the inclined rod 16, and the rubber 19 is also a hard rubber, and the hard rubber has support and deformation properties.

[0049] When the extrusion force acts on the buffer plate 5, the buffer plate 5 first squeezes the buffer frame 10 and squeezes and deforms the buffer frame 10. When the buffer plate 5 is squeezed downward, the buffer plate 5 drives the push rod 15 to press downward. Under the restriction of the slide groove 18, the push rod 15 drives the slide rod 17 to squeeze horizontally through the inclined rod 16. At this time, the slide rod 17 squeezes the rubber 19 in the slide groove 18, thereby achieving support for the buffer plate 5 as a whole and improving the support and buffering performance of the buffer plate 5. When the extrusion force is eliminated, the buffer frame 10 and the rubber 19 are deformed and reset, thereby ensuring the flatness of the road surface.

[0050] See also Figure 5 In order to ensure that the buffer plate 5 is horizontally abutted against the top surface of the buffer frame 10, the support frame 7 is further provided with a leveling assembly, and the leveling assembly includes an adjusting member 20. An adjusting thread groove 21 is provided at the position corresponding to the slide groove 18 on the outer side of the support frame 7, and the adjusting thread groove 21 is connected to the slide groove 18. The adjusting member 20 is a cylindrical block, and the adjusting member 20 is threadedly connected to the adjusting thread groove 21. One end of the adjusting member 20 is rotatably connected to a stop block 22 through a connecting rod, and the stop block 22 is slidably connected in the slide groove 18, and the stop block 22 abuts against one end of the rubber 19.

[0051] When the adjusting member 20 is rotated, the adjusting member 20 drives the stop block 22 to move toward the rubber 19 through the connecting rod. At this time, the stop block 22 is pressed against the rubber 19 and simultaneously drives the rubber 19 to move in the slide groove 18, thereby finally adjusting the horizontality of the buffer plate 5 to ensure that the buffer plate 5 is in contact with the top surface of the buffer frame 10.

[0052] See also Figure 6In order to reduce the heat in the support frame 7, the side wall of the support frame 7 is penetrated with a heat dissipation hole 23, and the outer end of the heat dissipation hole 23 is blocked with a blocking block 24. The blocking block 24 is used to block or open the heat dissipation hole 23, and the support frame 7 is provided with an opening and closing assembly for driving the blocking block 24 to move. The opening and closing assembly includes a push rod 25, and the push rod 25 slides in the heat dissipation hole 23, and the rod diameter of the push rod 25 is smaller than the hole diameter of the heat dissipation hole 23, so that the heat can be discharged from the heat dissipation hole 23. One end of the push rod 25 is fixedly connected to the blocking block 24, and the other end of the push rod 25 is provided with a first wedge surface 26. A pressing rod 28 is fixed to the bottom surface of the push rod 15, and a second wedge surface 27 is provided at the bottom end of the pressing rod 28, and the first wedge surface 26 matches the second wedge surface 27.

[0053] When the buffer plate 5 is pressed down, the buffer plate 5 drives the pressure rod 28 to descend through the push rod 15. Under the cooperation of the first wedge surface 26 and the second wedge surface 27, the pressure rod 28 drives the push rod 25 to move horizontally, and the push rod 25 drives the block 24 to push out, so that the heat dissipation hole 23 is opened. During the continuous driving of the vehicle, the block 24 continues to open and close the heat dissipation hole 23, which is conducive to improving the efficiency of heat flowing out of the support frame 7 from the heat dissipation hole 23 under the action of pressure.

[0054] It is worth noting that see Figure 6 In order to improve the stability of the cooperation between the first wedge-shaped surface 26 and the second wedge-shaped surface 27, the support frame 7 is provided with a reset member, which is a spring 29, and the spring 29 is sleeved on the side wall of the push rod 25. The side wall fixing ring of the push rod 25 is provided with a limiter 30, and the limiter 30 is a limiter ring. One end of the spring 29 is fixedly connected to the inner side of the limiter 30, and the other end of the spring 29 is fixedly connected to the inner side of the support frame 7.

[0055] When the push rod 25 moves away from the pressure rod 28, the pressure rod 28 compresses the spring 29 through the stopper 30. When the pressure rod 28 rises, the spring 29 returns to its original position and releases its elastic force, and drives the push rod 25 to move toward the pressure rod 28 through the stopper 30. At this time, the first wedge surface 26 and the second wedge surface 27 are always matched.

[0056] See also Figure 2 In order to improve the supporting force of the water storage frame 8, a crushed stone and rubber mixed layer 31 is mixed in the water storage frame 8. There are gaps in the rubber mixed layer at any time, which is conducive to water storage, thereby reducing the accumulation of water on the road surface, and the accumulated water eventually seeps into the ground. At the same time, under the enclosure of the water storage frame 8, the looseness of the crushed stone and rubber mixed layer 31 is reduced, which is conducive to supporting the surface layer 3 and improving the overall supporting performance of the support base 4.

[0057] A highway bridge roadbed and pavement construction method comprises the following steps:

[0058] S1: Lay the cushion layer 1, clean the construction waste on the roadbed, and initially install the buffer plate 5 on the buffer frame 10, and then insert the slide rod 17 into the slide groove 18, at which time the rubber 19 abuts against the abutment 22. Then, the adjusting member 20 is screwed, and the adjusting member 20 drives the abutment 22 to move through the connecting rod. Under the adjustment of the adjusting members 20 at both ends, the buffer plate 5 is finally placed horizontally and abuts against the top surface of the rubber 19 frame;

[0059] S2: Multiple support frames 7 and multiple water storage frames 8 are placed in sequence, and then the connecting column 11 is installed at the end angle position of the support frame 7 and the water storage frame 8, and the clamping block 13 is aligned and inserted into the clamping slot 14. Under the action of the connecting column 11, the support frame 7 and the water storage frame 8 are fixedly connected to each other. Then, the crushed stone and rubber mixed layer 31 is filled in the water storage frame 8 to complete the construction of the cushion layer 1;

[0060] S3: After the cushion layer 1 is constructed, a water seepage board 6 is installed on the top surface of the cushion layer 1;

[0061] S4: laying the base layer 2, the base layer 2 is mainly cement mortar, and when the cement mortar solidifies, the laying construction of the base layer 2 is completed;

[0062] S5: Laying the surface layer 3, which is mainly asphalt, and when the asphalt solidifies, the construction of the roadbed and pavement of the highway bridge is completed.

[0063] When the extrusion force of multiple vehicles driving on the buffer plate 5 acts on the top of the buffer plate 5, the extrusion force passes through the asphalt layer, the base layer 2, and the water-permeable plate 6 in sequence, and finally acts on the buffer plate 5. After being compressed, the buffer plate 5 squeezes the buffer layer downward. At the same time, the buffer plate 5 moving downward drives the push rod 15 to press downward, and the push rod 15 drives the sliding rod 17 to squeeze the rubber 19 through the inclined rod 16, thereby jointly supporting and buffering the extrusion force of the vehicles driving.

[0064] When the squeezing force of multiple vehicles acts on the crushed stone and rubber particles mixed layer 31, under the enclosure of the water storage frame 8, the crushed stone and rubber particles mixed layer 31 jointly supports the surface layer 3, and the rubber particles in the crushed stone and rubber particles mixed layer 31 buffer the squeezing force.

[0065] During the continuous vehicle squeezing process, the support plate drives the push rod 15 to be pressed back and forth, and the push rod 15 drives the pressure rod 28 to be pressed back and forth. With the cooperation between the first wedge surface 26 and the second wedge surface 27, and the cooperation and movement of the spring 29, the pressure rod 28 drives the push rod 25 to move back and forth, and the push rod 25 drives the blocking block 24 to reciprocately open and close the heat dissipation hole 23, thereby extracting the heat in the support frame 7 and reducing the heat in the support frame 7.

[0066] In summary, the buffer plate 5 and the crushed stone-rubber mixed layer 31 support the surface layer 3 together, which is beneficial to reduce the damage of the load-bearing structure, reduce the slurry rupture of the asphalt layer, and increase the service life of the asphalt road.

[0067] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A highway bridge subgrade pavement structure, comprising a cushion layer (1), a base layer (2) and a surface layer (3), characterized in that: A support base (4) is arranged in the cushion layer (1), a plurality of buffer plates (5) are arranged on the top surface of the support base (4), a water seepage plate (6) is arranged on the top surface of the plurality of buffer plates (5), the base layer (2) is arranged on the top surface of the water seepage plate (6), the surface layer (3) is arranged on the top surface of the base layer (2), and the support base (4) is respectively provided with support mechanisms for supporting the plurality of buffer plates (5); The support base (4) comprises a support frame (7) and a water storage frame (8); the support frame (7) and the water storage frame (8) are arranged at a distance from each other; a buffer frame (10) is arranged on the top surface of the support frame (7); the buffer plate (5) abuts against the top surface of the buffer frame (10); a connecting component is arranged between the support frame (7) and the water storage frame (8); and the support mechanism is arranged in the support frame (7); The support mechanism comprises a top rod (15), the top rod (15) is arranged on the bottom surface of the buffer plate (5), the two ends of the top rod (15) are hingedly provided with inclined rods (16), one end of the inclined rod (16) away from the top rod (15) is hingedly provided with a sliding rod (17), the inner side of the support frame (7) is provided with a sliding groove (18), the sliding rod (17) is slidably connected to the sliding groove (18), one end of the sliding rod (17) is provided with a rubber (19), and the support frame (7) is provided with a leveling component for leveling the buffer plate (5); The leveling assembly comprises an adjusting member (20), an adjusting thread groove (21) is provided on the outer side of the supporting frame (7), the adjusting member (20) is threadedly connected in the adjusting thread groove (21), one end of the adjusting member (20) extends in the sliding groove (18), a stop block (22) is rotatably provided at one end of the adjusting member (20), and the stop block (22) is in contact with the rubber (19); The support frame (7) is provided with a heat dissipation hole (23) extending therethrough, a blocking block (24) is provided at the outer end of the heat dissipation hole (23), and the support frame (7) is provided with an opening and closing component for driving the blocking block (24) to move; The opening and closing assembly includes a push rod (25), and the push rod (25) slides in the heat dissipation hole (23). One end of the push rod (25) is connected to the blocking block (24), and the other end of the push rod (25) is provided with a first wedge surface (26). The bottom surface of the push rod (15) is provided with a pressure rod (28), and the end of the pressure rod (28) away from the push rod (15) is provided with a second wedge surface (27). The first wedge surface (26) cooperates with the second wedge surface (27), and the support frame (7) is provided with a reset member for cooperating with the movement of the push rod (25).

2. A highway bridge subgrade and pavement structure according to claim 1, characterized in that: The connection assembly comprises a connection column (11), the end corners of the support frame (7) and the water storage frame (8) are respectively provided with a clearance groove (12), the connection column (11) is plugged into the clearance groove (12), a clamping block (13) is arranged in the clearance groove (12), and a clamping groove (14) is correspondingly arranged on the side wall of the connection column (11), and the clamping block (13) is plugged into the clamping groove (14).

3. A highway bridge subgrade and pavement structure according to claim 1, characterized in that: The reset member is a spring (29), and the spring (29) is sleeved on the side wall of the push rod (25). The side wall of the push rod (25) is ring-shaped with a limiting member (30), one end of the spring (29) abuts against the limiting member (30), and the other end of the spring (29) abuts against the inner wall of the support frame (7).

4. A highway bridge subgrade and pavement structure according to claim 2, characterized in that: A crushed stone and rubber particle mixed layer (31) is arranged in the water storage frame (8).

5. A method for constructing a highway bridge subgrade and pavement, based on the highway bridge subgrade and pavement structure according to claim 4, characterized in that: The steps include: The cushion layer (1) is laid, and the construction waste on the roadbed is cleaned. The buffer plate (5) is initially installed on the buffer frame (10), and then the slide rod (17) is inserted into the slide groove (18). At this time, the rubber (19) abuts against the abutment block (22), and then the adjusting member (20) is threadedly rotated. The adjusting member (20) drives the abutment block (22) to move through the connecting rod. Under the adjustment action of the adjusting members (20) at both ends, the buffer plate (5) is finally placed horizontally and abuts against the top surface of the buffer frame (10); A plurality of support frames (7) and a plurality of water storage frames (8) are sequentially placed at intervals, and then a connecting column (11) is installed at the end angle position of the support frame (7) and the water storage frame (8), and at the same time, the clamping block (13) is aligned and inserted into the clamping slot (14). Under the action of the connecting column (11), the support frame (7) and the water storage frame (8) are fixedly connected to each other, and then a crushed stone and rubber particle mixed layer (31) is filled in the water storage frame (8), and the construction of the cushion layer (1) is completed; After the cushion layer (1) is laid, a water seepage board (6) is installed on the top surface of the cushion layer (1); Laying the base layer (2) and waiting for the base layer (2) to solidify; The surface layer (3) is laid and the surface layer (3) is waited for to solidify, thereby completing the construction of the roadbed and pavement of the highway bridge.

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