A construction method for highway gangue filling roadbed
By directly crushing and wetting the coal gangue on the side of the roadbed during highway construction, the problem of uneven moisture content of the coal gangue roadbed is solved, and uniform compaction of the roadbed density is achieved and construction quality is improved.
Patent Information
- Application Number
- CN202411937354.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-04-08
AI Technical Summary
The prior art is difficult to make the moisture content of the coal gangue roadbed in highway construction, resulting in uneven compaction density and affecting the quality of the roadbed.
The coal gangue raw materials are directly crushed and wetted on the side of the roadbed by crushing equipment, and spray water on the crushing roller through the spray head to make the coal gangue more in contact with the water. Then the wet coal gangue is laid on the roadbed and compacted.
The uniform moisture content of the coal gangue roadbed is achieved, ensuring uniform compactness during subsequent compaction, and improving the quality of the roadbed.
Smart Images
Figure CN119777219A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of highway construction, and in particular to a construction method for highway gangue-filled roadbed. Background Art
[0002] Gangue is a sedimentary rock that is formed at the same time as the coal seam is formed. Most of it is limestone. Some highway designs have gangue near the road. In some highway projects, the gangue will be crushed and transported to the highway construction site, and then poured into the construction site. Then, a roller will compact and level the gangue to form a highway roadbed.
[0003] At present, the method of using coal gangue to lay roadbed is as follows: Step 1: crush the coal gangue; Step 2: transport the coal gangue to the construction site and lay it at the construction site; Step 3: In the process of laying coal gangue, it is necessary to determine the moisture content of coal gangue. If the moisture content of coal gangue is too low, the density of coal gangue will be low after the roller compacts the coal gangue. At this time, it is necessary to sprinkle water on the road surface that has been compacted for the first time to increase the moisture content of coal gangue. In the past, the method of sprinkling water on coal gangue was usually to pour directly with a water pipe, but this method not only causes the coal gangue to shift, but also easily leads to too high a moisture content. Therefore, some optimization solutions are to spray water on coal gangue with an atomizing nozzle; When using an atomizing nozzle to spray water, it is often only possible to wet the surface of the gangue roadbed, and it is difficult for water to enter the underlying layer of the gangue roadbed. Therefore, in the subsequent compaction process using a roller, the upper layer may have a high density and the lower layer may have a low density, resulting in uneven moisture content in the gangue. Therefore, how to make the gangue laid on the roadbed have a more uniform moisture content is an issue that needs to be addressed urgently. Summary of the invention
[0004] In order to make the coal gangue laid on the roadbed have a more uniform moisture content, the present application provides a construction method for highway coal gangue roadbed filling.
[0005] The present application provides a construction method for highway gangue filling roadbed adopts the following technical scheme: A construction method for highway gangue filling roadbed comprises the following steps: S1: Crushing and wetting coal gangue: Transport the gangue raw materials to the side of the roadbed; Weighing a preset weight of coal gangue to obtain coal gangue raw materials; While crushing the gangue raw materials on the side of the roadbed, a preset weight of water is added to the gangue raw materials, and after crushing, wet gangue is obtained; S2: Laying coal gangue: Laying the moistened coal gangue to the roadbed; S3: Compacting coal gangue: Compact the coal gangue to the preset density.
[0006] By adopting the above technical scheme, during construction, the gangue is directly crushed and moistened on the side of the roadbed. The process of moistening the gangue is carried out simultaneously with the crushing of the gangue, which can make the gangue contact with water more fully. After the gangue is crushed and moistened, it is directly laid on the roadbed. There is no need for additional watering later, so that the gangue laid on the roadbed has a relatively uniform moisture content, so that the roller can compact the gangue on the roadbed more evenly.
[0007] Optionally, in S1, a crushing device is used to crush the gangue raw material, and the crushing device includes: A box body with a feed inlet on the top; A crushing assembly having two crushing rollers, wherein the crushing rollers are parallel to the first direction, the crushing rollers are connected to the box body by rotating around their own axes, the two crushing rollers are sequentially distributed in the second direction, the two crushing rollers rotate in opposite directions, and the two crushing rollers rotate relative to each other toward the bottom wall of the box body; and A spray assembly is provided with a spray head, wherein the spray head is located above the crushing roller, and the water spraying direction is toward one side of the crushing roller.
[0008] By adopting the above technical solution, the coal gangue overlapped on the crushing rollers will be crushed during the rotation of the two crushing rollers, and the crushed coal gangue will fall downward; during the crushing process, the coal gangue can be moistened by spraying water on the coal gangue from the nozzle.
[0009] Optionally, the crushing equipment further comprises a pressure plate installed on the box body, wherein the pressure plate is located above the crushing roller; and A longitudinal drive assembly connected to the box body, the longitudinal drive assembly having an output end, the pressing plate being mounted on the output end of the longitudinal drive assembly, so that the longitudinal drive assembly drives the pressing plate to move along the third direction, so that the pressing plate can be adjusted between an open posture and a pressing posture; When the pressing plate is in an open position, the pressing plate is located above the feed opening; When the pressing plate is in a material pressing posture, the pressing plate is located in the box; The pressing plate is provided with a plurality of drainage holes, the nozzles extend into the drainage holes, and the nozzles are fixedly connected to the pressing plate.
[0010] By adopting the above technical solution, before crushing, the pressure plate can be driven to the top of the box to leave space for adding the coal gangue into the box; during crushing, the pressure plate is pressed downward to apply downward force to the coal gangue, so as to press the coal gangue down to the crushing roller for crushing operation.
[0011] Optionally, the pressing plate is provided with a plurality of drainage holes, the nozzle extends into the drainage holes, and the nozzle is fixedly connected to the pressing plate.
[0012] By adopting the above technical solution, the nozzle is arranged in the drainage hole, and water can still be added to the coal gangue even when the pressure plate presses the coal gangue tightly.
[0013] Optionally, the pressure plate is fixedly connected to a protective net in the drainage hole, and the protective net is located on a side of the nozzle close to the bottom wall of the box.
[0014] By adopting the above technical solution and setting up a protective net, it is possible to reduce the damage of the nozzle to the coal gangue.
[0015] Optionally, the output end of the longitudinal drive assembly is fixedly connected with a connecting plate, and the connecting plate is located above the pressing plate; The pressing plate is slidably connected to the connecting plate along the second direction, and a protrusion is convexly provided on the bottom wall of the connecting plate.
[0016] By adopting the above technical solution, when the pressing plate moves along the second direction, part of the coal gangue can be moved by the protrusion, so that part of the coal gangue can enter between the two crushing rollers.
[0017] Optionally, the crushing device further comprises a reverse thrust assembly, wherein the reverse thrust assembly comprises a first compression spring, and the expansion and contraction direction of the first compression spring is parallel to the second direction; One end of the first compression spring is fixedly connected to the right end of the pressure plate, and the other end is pressed against the inner wall of the box. When the first compression spring is in a recoverable deformation state, it has a force to drive the pressure plate to move from the right end of the pressure plate to the left end of the pressure plate.
[0018] By adopting the above technical solution, if the coal gangue pushes the pressure plate from the left end to the right end of the pressure plate, the first compression spring can push the pressure plate to return to the left, thereby pushing the coal gangue to move multiple times, so as to adjust the position of the coal gangue and make the contact between the coal gangue and water more even.
[0019] Optionally, the crushing roller includes a central shaft body and a plurality of crushing blocks protruding from a peripheral wall of the central shaft body, and a crushing gap is formed between two adjacent crushing blocks distributed in a circumferential direction of the central shaft body.
[0020] By adopting the above technical solution and setting the crushing gap, it is possible to provide a material feeding space for the crushing of coal gangue.
[0021] Optionally, the pressure plate is fixedly connected with a push rod, and one end of the push rod extends into a crushing gap on a crushing roller close to the left end of the pressure plate.
[0022] By adopting the above technical solution, during the rotation of the crushing roller, the push rod is pushed by the crushing block to move the push rod from the left end of the pressure plate to the right end of the pressure plate; after the crushing block passes over the push rod, the first compression spring will push the push rod from the right end of the pressure plate to the left end of the pressure plate to make the push rod contact the next crushing block; by setting the push rod, power can be provided for the movement of the pressure plate, so that water can be sprayed onto the coal gangue more evenly during the movement of the pressure plate.
[0023] Optionally, the crushing equipment also includes a balancing assembly, which includes a second compression spring, one end of which is fixedly connected to the pressure plate and the other end of which is slidably connected to the connecting plate along the second direction, and the expansion and contraction direction of the second compression spring is parallel to the third direction.
[0024] By adopting the above technical solution and arranging the second compression spring, a certain movable space is provided for the pressing plate in the depth direction of the box body, thereby preventing the pressing plate from being stuck by coal gangue and becoming unable to move.
[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. This application directly lays the coal gangue on the roadbed after it is crushed and moistened. No additional watering is required in the future, so that the coal gangue laid on the roadbed has a relatively uniform moisture content, so that the roller can compact the coal gangue on the roadbed more evenly; 2. By setting the pressure plate, the gangue can be pressed to the crushing roller for crushing; 3. By moving the pressing plate along the second direction, water can be sprayed onto the coal gangue more evenly. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 It is a schematic diagram of the structure of the crushing assembly in the embodiment of the present application; Figure 3 is a schematic diagram of the structure of the thrust reverser assembly in an embodiment of the present application; Figure 4 It is a schematic diagram of the structure of the spray assembly in the embodiment of the present application.
[0027] Explanation of the reference numerals in the accompanying drawings: 1. Box body; 11. Feed inlet; 12. Discharge outlet; 2. Crushing assembly; 21. Crushing roller; 211. Central axis; 212. Crushing block; 213. Crushing gap; 22. Motor; 3. Pressing plate; 31. Protrusion; 32. Avoidance gap; 33. Push rod; 34. Drain hole; 4. Longitudinal drive assembly; 41. Hydraulic cylinder; 42. Adapter plate; 43. Pressing rod; 5. Connecting plate; 51. Slide groove; 52. Sliding block; 6. Thrust assembly; 61. First compression spring; 62. First telescopic rod; 63. Push block; 7. Balancing assembly; 71. Second compression spring; 72. Second telescopic rod; 8. Spraying assembly; 81. Spray nozzle; 82. Protective net. DETAILED DESCRIPTION
[0028] The following is combined with Figure 1-4 The present application is further described in detail. For ease of description, the present application introduces directional words such as a first direction, a second direction, and a third direction to form a three-dimensional reference direction. The directional words used, such as "a first direction, a second direction, and a third direction", can be specifically shown with reference to the figure, where X represents the first direction X, Y represents the second direction Y, and Z represents the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.
[0029] The embodiment of the present application discloses a construction method for a highway gangue-filled roadbed. The construction method for a highway gangue-filled roadbed comprises the following steps: S1: Crushing and wetting coal gangue: Dig out the gangue from the raw material plant and transport the gangue raw materials to the side of the roadbed; Weighing a preset weight of coal gangue to obtain coal gangue raw materials; While the gangue raw material is being crushed, a preset weight of water is added to the gangue raw material, wherein the weight ratio of water to gangue is determined according to the required wettability, and after crushing, wet gangue is obtained; S2: Laying coal gangue: Laying the moistened coal gangue to the roadbed; S3: Compacting coal gangue: A roller is used to compact the coal gangue to a preset density.
[0030] In S1, the coal gangue raw materials are crushed and moistened by crushing equipment, referring to Figure 1 and Figure 2 The crushing equipment includes a box body 1 having a feed inlet 11 at the top and a discharge outlet 12 at the bottom. The box body 1 is provided with a valve at the discharge outlet 12 to control the collection and discharge of wet coal gangue; The crushing equipment also includes a crushing assembly 2, which includes two crushing rollers 21 and two motors 22. The crushing roller 21 has a central axis 211 and a crushing block 212 protruding from the peripheral wall of the central axis 211. A crushing gap 213 is formed between two adjacent crushing blocks 212 in the circumferential direction of the central axis 211; the crushing roller 21 is parallel to the first direction, and the two crushing rollers 21 are spaced apart in the second direction. The crushing roller 21 is connected to the box body 1 around its own axis; in order to drive the crushing roller 21 to rotate, the housing of the motor 22 is fixedly connected to the outer wall of the box body 1, and the output shaft of the motor 22 passes through the side wall of the box body 1 and is coaxially fixedly connected to the crushing roller 21, so that the crushing roller 21 is driven by the motor 22 to rotate along the box body 1; the two crushing rollers 21 rotate in opposite directions, and each crushing roller 21 rotates toward the other crushing roller 21 toward the bottom of the box body, so that the coal gangue located between the two crushing rollers 21 can be squeezed and crushed.
[0031] Reference Figure 1 and Figure 2 In order to squeeze the coal gangue toward the crushing roller 21 as much as possible, in some embodiments of the present application, the crushing device further includes a pressing plate 3 capable of sliding along a third direction and a longitudinal driving assembly 4 for driving the pressing plate 3 to slide along the third direction; the third direction in the present disclosure is a direction of traveling back and forth between the feed port 11 and the discharge port 12 of the box body 1; When the pressing plate 3 slides along the third direction, it can be adjusted between the open posture and the pressing posture; When the pressing plate 3 is in an open position, the pressing plate 3 is located above the feed opening 11 of the box body 1, and the gangue passes through the feed opening 11 of the pressing plate 3 and falls onto the crushing roller 21, so that the gangue can be crushed; When the pressing plate 3 is in a closed position, the pressing plate 3 is located in the box body 1, and a gap for accommodating coal gangue is formed in the first direction between the top of the crushing roller 21 and the pressing plate 3, so as to press the coal gangue down to the crushing roller 21; In order to drive the pressure plate 3 to move smoothly along the third direction, two longitudinal drive components 4 are provided in the present invention, and one longitudinal drive component 4 is correspondingly provided on each side of the box body 1. The longitudinal drive component 4 includes a hydraulic cylinder 41, an adapter plate 42 and a pressure rod 43. The cylinder body of the hydraulic cylinder 41 is fixedly connected to the box body 1, and the piston rod of the hydraulic cylinder 41 is fixedly connected to the adapter plate 42. The adapter plate 42 is located above the hydraulic cylinder 41. One end of the pressure rod 43 is fixedly connected to the adapter plate 42, and the other end is fixedly connected to the connecting plate 5. The pressure plate 3 is installed on the connecting plate 5; the hydraulic cylinder 41 drives the pressure plate 3 to move up and down through the connecting plate 5.
[0032] Reference Figure 2 and Figure 3In some embodiments of the present application, in the second direction, a movable gap is left between the pressing plate 3 and the inner wall of the box body 1, and the pressing plate 3 can move along the connecting plate 5 in the second direction, so that the pressing plate 3 can move the coal gangue along the second direction, so as to facilitate the pressing plate 3 to move the coal gangue, so as to push part of the coal gangue between the two crushing rollers 21 for crushing; in order to facilitate the pressing plate 3 to move the coal gangue, a plurality of protrusions 31 are fixedly connected to the bottom wall of the pressing plate 3, and the width of the protrusions 31 in the second direction gradually decreases toward the side away from the pressing plate 3, and an avoidance gap 32 is formed between adjacent protrusions 31 on a plane perpendicular to the third direction to reserve space for moving the coal gangue; In order to guide the pressure plate 3 to move along the second direction, a slide groove 51 is opened on the bottom wall of the connecting plate 5 along the second direction, and a slider 52 is installed on the pressure plate 3. The slider 52 is located in the slide groove 51 and can slide in the slide groove 51 along the second direction. The slider 52 in the present disclosure is in an adaptive T-shape with the slide groove 51, and the pressure plate 3 is installed on the slider 52.
[0033] Reference Figure 2 and Figure 3 , for the convenience of description, the two ends of the pressing plate 3 in the second direction are named as the left end and the right end. It should be understood that the left end and the right end mentioned in the present disclosure only represent two opposite ends, and do not represent the position of the left hand side or the right hand side when a person stands on one side of the box body 1; a reverse thrust assembly 6 is provided at the right end of the pressing plate 3, and the reverse thrust assembly 6 includes a first compression spring 61 fixedly connected to the right end of the pressing plate 3 at one end, and the expansion and contraction direction of the first compression spring 61 is parallel to the second direction, and the other end of the first compression spring 61 can be pressed against the inner wall of the box body 1; in the process of the coal gangue pushing the pressing plate 3 from the left end to the right end, the deformation of the first compression spring 61 increases, and the force that pushes the pressing plate 3 from the right end to the left end is stored; In order to prevent the first compression spring 61 from bending, in some embodiments of the present application, the reverse push assembly 6 further includes a first telescopic rod 62 and a push block 63. One end of the first compression spring 61 away from the pressing plate 3 is fixedly connected to the push block 63, so that the push block 63 is pressed tightly against the inner wall of the box body 1 by the first compression spring 61. The telescopic direction of the first telescopic rod 62 is parallel to the second direction. One end of the first telescopic rod 62 is fixedly connected to the push block 63, and the other end is fixedly connected to the right end of the pressing plate 3. After the coal gangue pushes the pressing plate 3 from the left end to the right end, the pressing plate 3 can be pushed to the left under the push of the first compression spring 61, so as to realize multiple pushing. In some cases, the force of the coal gangue pushing the pressure plate 3 is relatively small. For this reason, in some embodiments of the present application, a push rod 33 is fixedly connected to the bottom wall of the left end of the pressure plate 3, and the end of the push rod 33 away from the pressure plate 3 is rounded; the end of the pressure rod 43 extends into the crushing gap 213 on the crushing roller 21 near the left end of the pressure plate 3, and the crushing roller 21 pushes the push rod 33 to push the pressure plate 3 from the left end to the right end during the rotation; when the push rod 33 is in the avoidance gap 32 between the two crushing blocks 212, the first compression spring 61 pushes the pressure plate 3 from the right end to the left end.
[0034] Reference Figure 3 In order to prevent the pressing plate 3 from getting stuck during the movement of the pressing plate 3 along the second direction, some embodiments of the present application further include a balancing assembly 7, which includes a second compression spring 71 and a second telescopic rod 72. The telescopic directions of the second compression spring 71 and the second telescopic rod 72 are parallel to the third direction. One end of the second compression spring 71 is fixedly connected to the slider 52, and the other end is fixedly connected to the pressing plate 3. One end of the second telescopic rod 72 is fixedly connected to the slider 52, and the other end is fixedly connected to the pressing rod 43, so as to realize the elastic movement of the pressing plate 3 in the third direction through the second compression spring 71; when the second elastic member is in normal state, the second telescopic rod 72 is at its maximum length, and the end of the push rod 33 can extend into the crushing gap 213 at this time.
[0035] Reference Figure 4 In the crushing process, the gangue needs to be moistened. For this purpose, the crushing equipment further includes a spray assembly 8, which includes a plurality of spray heads 81. In order to install the spray heads 81, the pressing plate 3 is penetrated with a plurality of drainage holes 34, which are connected with the avoidance gap 32. A spray head 81 is correspondingly arranged in each drainage hole 34. The spray head 81 is fixedly connected to the pressing plate 3, and the spraying direction of the spray head 81 is toward the crushing roller 21. In order to prevent the coal gangue from damaging the nozzle 81 , a protective net 82 is fixedly connected to each corresponding drainage hole 34 of the pressure plate 3 . The protective net 82 is made of steel and is located on the side of the nozzle 81 close to the crushing roller 21 .
[0036] When the gangue is crushed and moistened, the gangue is first added into the box 1, and then the hydraulic cylinder 41 drives the connecting plate 5 to move downward, and the pressing plate 3 rotates downward along with the connecting plate 5; During the rotation of the two crushing rollers 21, the pressing plate 3 presses the gangue toward one side of the crushing roller 21. Then, during this process, the push rod 33 or the gangue drives the pressing plate 3 to move from the left end of the pressing plate 3 to the right end of the pressing plate 3. The pressing plate 3 moves from the right end of the pressing plate 3 to the left end under the push of the first compression spring 61. During the crushing process, the second compression spring 71 enables the pressing plate 3 to move in the first direction to prevent the pressing plate 3 from being stuck; During the entire crushing process, water is added to the box 1 according to the required amount to achieve wetting of the coal gangue while crushing it; if it is necessary to further improve the wetting uniformity, the crushed coal gangue is simply poured into the box 1 again and repeated wetting, that is, a certain proportion of water is added during the first crushing process, and another certain proportion of water is added during the second wetting process.
[0037] 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 construction method for highway gangue filling roadbed, characterized in that: The steps include: S1: Crushing and wetting coal gangue: Transport the gangue raw materials to the side of the roadbed; Weighing a preset weight of coal gangue to obtain coal gangue raw materials; While crushing the gangue raw materials on the side of the roadbed, a preset weight of water is added to the gangue raw materials, and after crushing, wet gangue is obtained; S2: Laying coal gangue: Laying the moistened coal gangue to the roadbed; S3: Compacting coal gangue: Compact the coal gangue to the preset density.
2. A construction method for highway gangue filling roadbed according to claim 1, characterized in that: In S1, the coal gangue raw material is crushed by using a crushing device, and the crushing device includes: A box body (1) having a feed inlet (11) at the top; A crushing assembly (2) having two crushing rollers (21), wherein the crushing rollers (21) are parallel to a first direction, the crushing rollers (21) are connected to the housing (1) by rotating around their own axes, the two crushing rollers (21) are sequentially distributed in a second direction, the two crushing rollers (21) rotate in opposite directions, and the two crushing rollers (21) rotate relative to each other toward a side of a bottom wall of the housing (1); and A spray assembly (8) having a spray head (81), wherein the spray head (81) is located above the crushing roller (21), and the water spraying direction is toward one side of the crushing roller (21).
3. A construction method for highway gangue filling roadbed according to claim 2, characterized in that: The crushing device further comprises a pressure plate (3) mounted on the box body (1), wherein the pressure plate (3) is located above the crushing roller (21); and A longitudinal drive assembly (4) connected to the box body (1), the longitudinal drive assembly (4) having an output end, the pressing plate (3) being mounted on the output end of the longitudinal drive assembly (4), so that the longitudinal drive assembly (4) drives the pressing plate (3) to move along a third direction, so that the pressing plate (3) can be adjusted between an open posture and a material pressing posture; When the pressing plate (3) is in an open position, the pressing plate (3) is located above the feed opening (11); When the pressing plate (3) is in a material pressing posture, the pressing plate (3) is located inside the box body (1).
4. A construction method for highway gangue filling roadbed according to claim 3, characterized in that: The pressing plate (3) is provided with a plurality of drainage holes (34) extending through it, the nozzle (81) extending into the drainage holes (34), and the nozzle (81) is fixedly connected to the pressing plate (3).
5. The construction method of a highway gangue roadbed according to claim 4, characterized in that: The pressure plate (3) is fixedly connected to a protection net (82) in the drainage hole (34); the protection net (82) is located on a side of the nozzle (81) close to the bottom wall of the box body (1).
6. A construction method for highway gangue filling roadbed according to claim 4, characterized in that: The output end of the longitudinal drive assembly (4) is fixedly connected to a connecting plate (5), and the connecting plate (5) is located above the pressing plate (3); The pressing plate (3) is slidably connected to the connecting plate (5) along a second direction, and a protrusion (31) is convexly provided on the bottom wall of the connecting plate (5); In the second direction, there is a movable gap between the pressing plate (3) and the inner wall of the box body (1).
7. A construction method for highway gangue filling roadbed according to claim 6, characterized in that: The crushing device further comprises a reverse thrust assembly (6), wherein the reverse thrust assembly (6) comprises a first compression spring (61), wherein the expansion and contraction direction of the first compression spring (61) is parallel to the second direction; One end of the first compression spring (61) is fixedly connected to the right end of the pressure plate (3), and the other end is pressed against the inner wall of the box body (1). When the first compression spring (61) is in a state where the deformation can be recovered, it has a force that drives the pressure plate (3) to move from the right end of the pressure plate (3) to the left end of the pressure plate (3).
8. A construction method for highway gangue filling roadbed according to claim 7, characterized in that: The crushing roller (21) comprises a central shaft (211) and a plurality of crushing blocks (212) protruding from the peripheral wall of the central shaft (211), and a crushing gap (213) is formed between two adjacent crushing blocks (212) distributed in the circumferential direction of the central shaft (211).
9. A construction method for highway gangue filling roadbed according to claim 8, characterized in that: The pressing plate (3) is fixedly connected to a push rod (33), one end of which extends into a crushing gap (213) on a crushing roller (21) close to the left end of the pressing plate (3).
10. A construction method for highway gangue filling roadbed according to claim 9, characterized in that: The crushing device also includes a balancing component (7), and the balancing component (7) includes a second compression spring (71), one end of the second compression spring (71) is fixedly connected to the pressure plate (3), and the other end is slidably connected to the connecting plate (5) along the second direction, and the expansion and contraction direction of the second compression spring (71) is parallel to the third direction.