Improved soil pulverizer for adding waste fly ash into roadbed soft soil and pulverizing method

Abstract

The invention relates to the technical field of soil improvement, in particular to an improved soil pulverizer for adding waste fly ash into roadbed soft soil and a pulverizing method.The improved soil pulverizer comprises a frame body and a pulverizing box arranged on the frame body, a net plate is horizontally and slidably arranged in the pulverizing box, and the bottom of the pulverizing box is fixedly communicated with a mixing box; a crushing assembly is arranged in the crushing box, a driving mechanism connected with the crushing assembly is arranged on the frame body, a screening assembly is arranged on the frame body, the screening assembly is connected with the screen plate and the crushing assembly, a stirring assembly is arranged in the mixing box and connected with the screening assembly through a transmission structure, and a discharging assembly is arranged on the frame body. According to the device, the driving mechanism, the smashing assembly, the net plate, the screening assembly, the stirring assembly and the discharging assembly are matched with one another, soil and coal ash can be smashed, the situation that smashing and mixing are not thorough is avoided, and therefore the durability and stability of the soft soil roadbed are effectively enhanced.

Description

Technical Field

[0001] This invention relates to the field of soil improvement technology, specifically to a soil improvement pulverizer and pulverization method for adding waste fly ash to soft soil in roadbeds. Background Art

[0002] Adding waste fly ash to soft subgrade soil and processing it using a soil improver is an effective method for subgrade improvement. Fly ash, as an industrial waste, can be used as a material for improving subgrade soil after pretreatment by water washing. The soil improver uses high-speed rotating blades to cut, impact, tear, and compress the soil and fly ash mixture, achieving rapid pulverization and improving soil structure. The pulverized mixture has better permeability, water retention, and fertility, while also improving the stability of the subgrade. This method not only helps in the resource utilization of waste but also reduces the cost of subgrade improvement, resulting in significant economic and environmental benefits.

[0003] In conclusion, using a soil improver to treat soft subgrade soil mixed with waste fly ash is a subgrade improvement technology worth promoting.

[0004] A soil improver pulverizer is a pulverizing device specifically designed for soil. Its core working principle involves using rotating blades or jaws to cut, impact, tear, and compress the soil, thus grinding it into fine particles. This process not only alters the physical properties and structure of the soil but also accelerates the decomposition of organic matter by soil microorganisms, improving the permeability and absorption efficiency of plant roots. Specifically, a soil improver pulverizer mainly consists of a feed inlet, a pulverizing device, a discharge outlet, and a motor. After the soil enters the feed inlet, it is cut and impacted by the rotating blades, pulverized into small particles, and discharged through the discharge outlet.

[0005] However, while existing soil improvement pulverizers can pulverize soil and added fly ash, they lack screening capabilities. During operation, the pulverizer may not pulverize completely, resulting in large soil particles being missed and poor soil improvement. In addition, the pulverized soil and fly ash may not mix evenly, which reduces the durability of soft soil subgrades and increases cement consumption. Summary of the Invention

[0006] The purpose of this invention is to provide a soil pulverizer and pulverization method for adding waste fly ash to soft soil in roadbed, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A soil pulverizer for improving soft soil by adding waste fly ash to roadbed includes a frame and a pulverizing box mounted on the frame. A screen is horizontally slidably mounted inside the pulverizing box. A mixing box is fixedly connected to the bottom of the pulverizing box. A feed inlet is provided on one side of the pulverizing box. The crushing chamber is equipped with a crushing component, and the frame is equipped with a drive mechanism connected to the crushing component. During the operation of the drive mechanism, the crushing component will crush the material that enters the crushing chamber through the feed inlet. The frame is equipped with a screening component, which is connected to the screen plate and the crushing component respectively. The screening component will drive the screen plate to move horizontally back and forth under the action of the crushing component. The mixing chamber is equipped with a stirring component, which is connected to the screening component through a transmission structure. During the operation of the screening component, the stirring component will follow the movement of the transmission structure to uniformly mix the materials in the mixing chamber. The frame is equipped with a discharge component, which is connected to the mixing chamber and the crushing component respectively. The discharge component discharges the material in the mixing chamber under the action of the crushing component.

[0008] As a further embodiment of the present invention: the crushing assembly includes a first rotating shaft and a second rotating shaft that are respectively horizontally rotatably disposed on the crushing box, and the first rotating shaft and the second rotating shaft are horizontally symmetrically disposed; Both the No. 1 and No. 2 rotating shafts are provided with multiple crushing teeth, which mesh with each other. One end of the No. 1 and No. 2 rotating shafts is respectively provided with a driving gear and a driven gear, which mesh with each other.

[0009] As a further embodiment of the present invention: the driving mechanism includes a motor mounted on the frame and a first transmission wheel mounted on the other end of the first rotating shaft, and a second transmission wheel is mounted on the output end of the motor. The first transmission wheel and the second transmission wheel are connected by a first belt.

[0010] As a further embodiment of the present invention: the screening assembly includes a support mounted on the frame and a rotating rod horizontally rotatably mounted on the support, wherein a sleeve is movably sleeved on the outer wall of the rotating rod; The outer wall of the sleeve is provided with an L-shaped rod, one end of which is fixedly connected to one end of the mesh plate.

[0011] As a further embodiment of the present invention: the outer wall of the rotating rod is provided with a track groove, and the inner wall of the sleeve is fitted with a ball bearing, which is also fitted with the track groove. One end of the rotating rod is provided with a No. 3 transmission wheel, and the other end of the No. 2 rotating shaft is provided with a No. 4 transmission wheel. The No. 3 transmission wheel and the No. 4 transmission wheel are connected by a second belt.

[0012] As a further embodiment of the present invention: the stirring assembly includes a fixed rod horizontally disposed in the mixing chamber and a vertical rod rotatably disposed at the bottom of the mixing chamber; The top of the vertical rod is rotatably engaged with the fixed rod, and a stirring rod is provided on the outer wall of the vertical rod.

[0013] As a further embodiment of the present invention: the transmission structure includes a transmission shaft that is horizontally rotatably mounted on the frame and a first bevel gear mounted at one end of the transmission shaft, and a second bevel gear that meshes with the first bevel gear is mounted at the bottom end of the vertical rod. The other end of the drive shaft is provided with a No. 5 drive wheel, and the other end of the rotating rod is provided with a No. 6 drive wheel. The No. 5 drive wheel and the No. 6 drive wheel are connected by a third belt.

[0014] As a further embodiment of the present invention: the discharge assembly includes a conveying cylinder horizontally arranged on the frame and a spiral conveying rod disposed inside the conveying cylinder and having one end rotatably engaged with one end of the conveying cylinder. The other end of the conveying cylinder is connected to the side wall of the mixing box, and an annular support seat is provided inside the other end of the conveying cylinder. The other end of the spiral conveying rod is located inside the annular support seat and rotates with it. The bottom of one end of the conveying cylinder is provided with a discharge port, one end of the spiral conveying rod is provided with a No. 7 transmission wheel, one end of the No. 1 rotating shaft is provided with a No. 8 transmission wheel, and the No. 7 transmission wheel and the No. 8 transmission wheel are connected by a fourth belt.

[0015] A method for pulverizing soft soil and waste fly ash in roadbed using the pulverizer described above includes the following steps: Step 1: Based on the thickness and characteristics of the soft soil, select appropriate shallow foundation treatment, replacement treatment, and set up a drainage cushion layer; Step 2: Collect industrial waste fly ash and then pre-treat it by water washing to make the fly ash suitable as a material for improving roadbed soil. Step 3: Add the treated fly ash and roadbed soft soil into the crusher in a certain proportion, and crush and mix them to ensure uniform mixing; Step 4: Control the moisture content of the mixture. If the moisture content is too high, it can be reduced by drying or adding quicklime.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The set-in crushing component, driven by the drive mechanism, crushes the soil and fly ash in the crushing box. The crushed material falls above the screen plate, and the fine particles pass through the screen plate into the mixing box, while the larger particles are further crushed by the crushing component. This cycle is repeated until the particles are broken down into smaller ones. At the same time, the screening component, driven by the crushing component, moves the screen plate horizontally back and forth, thereby improving the efficiency of material screening. During the operation of the screening component, the mixing component, through the transmission structure, follows the movement to uniformly mix the materials in the mixing box, thereby enhancing the durability of the soft soil subgrade and reducing the amount of cement used. Finally, the discharge component, driven by the crushing component, discharges the mixed material from the mixing box.

[0017] This application utilizes the coordinated operation of a drive mechanism, a crushing component, a screen, a screening component, a mixing component, and a discharge component to not only crush soil and fly ash but also avoid incomplete crushing and mixing. This effectively enhances the durability and stability of soft soil subgrades, reduces cement usage, and lowers the cost of subgrade improvement. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of an embodiment of a soil improver for adding waste fly ash to soft soil in roadbed.

[0019] Figure 2 A schematic diagram of the removal of the crushing box structure in one embodiment of a soil improver for adding waste fly ash to soft soil subgrade.

[0020] Figure 3 A cross-sectional view of the crushing box, mixing box, and sleeve structure in one embodiment of a soil improver for adding waste fly ash to soft subgrade soil.

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0022] Figure 5 A cross-sectional view of the mixing box and conveying cylinder structure after removing the crushing box in one embodiment of a soil improver for adding waste fly ash to soft soil subgrade.

[0023] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0024] Figure 7 A cross-sectional view of the structure of a soil pulverizer for improving soft soil by adding waste fly ash to roadbed, after removing the frame, pulverizing box, pulverizing teeth, mixing box, and conveying cylinder.

[0025] Figure 8 for Figure 7 Enlarged view of point C in the middle.

[0026] Figure 9 A schematic diagram from another perspective of the overall structure of an embodiment of a soil pulverizer for adding waste fly ash to soft soil subgrade.

[0027] Figure 10 A cross-sectional view of the mixing box and conveying cylinder in one embodiment of a soil pulverizer for adding waste fly ash to soft soil subgrade.

[0028] In the diagram: 1. Frame; 2. Crushing box; 201. Feed inlet; 3. Mesh plate; 4. Mixing box; 5. No. 1 rotating shaft; 6. No. 2 rotating shaft; 7. Crushing teeth; 8. Drive gear; 9. Driven gear; 10. Motor; 11. No. 1 transmission wheel; 12. No. 2 transmission wheel; 13. First belt; 14. Support; 15. Rotating rod; 1501. Track groove; 16. Sleeve; 17. L-shaped rod; 18. Ball bearing; 19. No. 3 transmission. 20. No. 4 drive wheel; 21. Second belt; 22. Fixed rod; 23. Vertical rod; 24. Stirring rod; 25. Drive shaft; 26. No. 1 bevel gear; 27. No. 2 bevel gear; 28. No. 5 drive wheel; 29. ​​No. 6 drive wheel; 30. Third belt; 31. Conveying cylinder; 32. Screw conveyor rod; 33. Annular support seat; 34. Discharge port; 35. No. 7 drive wheel; 36. No. 8 drive wheel; 37. Fourth belt. Detailed Implementation

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0031] Please see Figures 1-10 In this embodiment of the invention, a soil improvement pulverizer for adding waste fly ash to soft soil subgrade includes a frame 1 and a pulverizing box 2 set on the frame 1. A mesh plate 3 is horizontally slidably arranged inside the pulverizing box 2. A mixing box 4 is fixedly connected to the bottom of the pulverizing box 2. A feed inlet 201 is provided on one side of the pulverizing box 2. The crushing box 2 is equipped with a crushing component inside, and the frame 1 is equipped with a drive mechanism connected to the crushing component. During the operation of the drive mechanism, the crushing component will crush the material that enters the crushing box 2 through the feed inlet 201. The frame 1 is equipped with a screening component, which is connected to the screen plate 3 and the crushing component respectively. The screening component will drive the screen plate 3 to move horizontally back and forth under the action of the crushing component. The mixing chamber 4 is equipped with a stirring component, which is connected to the screening component through a transmission structure. During the operation of the screening component, the stirring component will follow the movement of the transmission structure to uniformly mix the materials in the mixing chamber 4. The frame 1 is equipped with a discharge component, which is connected to the mixing box 4 and the crushing component respectively. The discharge component discharges the material in the mixing box 4 under the action of the crushing component.

[0032] In this scheme, the crushing component, driven by the drive mechanism, crushes the soil and fly ash in the crushing box 2. The crushed material falls above the screen plate 3. Fine particles pass through the screen plate 3 and enter the mixing box 4, while larger particles are further crushed by the crushing component. This cycle is repeated until the particles are broken down into smaller ones. Simultaneously, the screening component, driven by the crushing component, moves the screen plate 3 horizontally back and forth, thereby improving the efficiency of material screening. During the operation of the screening component, the stirring component, through the transmission structure, follows the movement to uniformly mix the material in the mixing box 4, thereby enhancing the durability of the soft soil subgrade and reducing cement consumption. Finally, the discharge component, driven by the crushing component, discharges the mixed material from the mixing box 4.

[0033] Please see Figure 2 The crushing assembly includes a first rotating shaft 5 and a second rotating shaft 6 that are respectively horizontally rotatably mounted on the crushing box 2, and the first rotating shaft 5 and the second rotating shaft 6 are arranged horizontally symmetrically. Both the first rotating shaft 5 and the second rotating shaft 6 are provided with multiple crushing teeth 7, which mesh with each other. One end of the first rotating shaft 5 and the second rotating shaft 6 is respectively provided with a driving gear 8 and a driven gear 9, which mesh with each other.

[0034] In this embodiment, since the driving gear 8 fixed on the first rotating shaft 5 and the driven gear 9 fixed on the second rotating shaft 6 mesh with each other, when the first rotating shaft 5 rotates, the driving gear 8 will cooperate with the driven gear 9 to drive the second rotating shaft 6 to rotate in the opposite direction. Furthermore, since both the first rotating shaft 5 and the second rotating shaft 6 are equipped with multiple crushing teeth 7, and these multiple crushing teeth 7 mesh with each other, the material entering the crushing box 2 through the feed inlet 201 will be crushed by the multiple rotating crushing teeth 7.

[0035] Please see Figure 2 , Figure 7 The drive mechanism includes a motor 10 mounted on the frame 1 and a first transmission wheel 11 mounted on the other end of the first rotating shaft 5. A second transmission wheel 12 is mounted on the output end of the motor 10. The first transmission wheel 11 and the second transmission wheel 12 are connected by a first belt 13.

[0036] In this embodiment, since the first transmission wheel 11 and the second transmission wheel 12 are connected by the first belt 13, when the second transmission wheel 12 rotates, the first transmission wheel 11 will rotate along with it through the first belt 13, thereby driving the first rotating shaft 5 to rotate. Since the second transmission wheel 12 is fixed on the output end of the motor 10, when the motor 10 is started, the second transmission wheel 12 will rotate following the output end of the motor 10.

[0037] Please see Figure 4 , Figure 6 , Figure 10 The screening assembly includes a support 14 mounted on the frame 1 and a rotating rod 15 mounted horizontally on the support 14. A sleeve 16 is movably sleeved on the outer wall of the rotating rod 15. The outer wall of the sleeve 16 is provided with an L-shaped rod 17, one end of which is fixedly connected to one end of the mesh plate 3; The outer wall of the rotating rod 15 is provided with a track groove 1501, and the inner wall of the sleeve 16 is fitted with a ball bearing 18, which is also fitted into the track groove 1501. One end of the rotating rod 15 is provided with a third transmission wheel 19, and the other end of the second rotating shaft 6 is provided with a fourth transmission wheel 20. The third transmission wheel 19 and the fourth transmission wheel 20 are connected by a second belt 21.

[0038] In this embodiment, since the ball bearings 18 are simultaneously rolled and fitted into the track grooves 1501 on the inner wall of the sleeve 16 and the outer wall of the rotating rod 15, and the sleeve 16 is fixedly connected to the screen plate 3 through the L-shaped rod 17, when the rotating rod 15 rotates, the sleeve 16 will drive the screen plate 3 to move horizontally back and forth, thereby screening the material falling on the screen plate 3. Due to gravity, the material will pass through the screen plate 3 and fall into the mixing box 4. Since the third transmission wheel 19 and the fourth transmission wheel 20 are connected by the second belt 21, as the fourth transmission wheel 20 rotates with the second shaft 6, the rotating rod 15 will rotate with the fourth transmission wheel 20 through the third transmission wheel 19 and the second belt 21.

[0039] See also Figure 7 , Figure 9 The stirring assembly includes a fixed rod 22 horizontally disposed inside the mixing tank 4 and a vertical rod 23 vertically rotatably disposed at the bottom of the mixing tank 4; The top end of the vertical rod 23 is rotatably engaged with the fixed rod 22, and a stirring rod 24 is provided on the outer wall of the vertical rod 23.

[0040] In this embodiment, since the stirring rod 24 is mounted on the vertical rod 23, when the vertical rod 23 rotates, the stirring rod 24 will rotate along with the vertical rod 23, thereby uniformly mixing the materials in the mixing box 4.

[0041] See also Figure 6 , Figure 7 The transmission structure includes a transmission shaft 25 that is horizontally rotatably mounted on the frame 1 and a first bevel gear 26 mounted at one end of the transmission shaft 25. The bottom end of the vertical rod 23 is provided with a second bevel gear 27 that meshes with the first bevel gear 26. The other end of the drive shaft 25 is provided with a fifth drive wheel 28, and the other end of the rotating rod 15 is provided with a sixth drive wheel 29. The fifth drive wheel 28 and the sixth drive wheel 29 are connected by a third belt 30.

[0042] In this embodiment, since the first bevel gear 26 and the second bevel gear 27 mesh with each other, when the transmission shaft 25 drives the first bevel gear 26 to rotate, the vertical rod 23 will follow the first bevel gear 26 to rotate through the second bevel gear 27. Since the fifth transmission wheel 28 and the sixth transmission wheel 29 are connected by the third belt 30, when the rotating rod 15 rotates, the rotating rod 15 will drive the transmission shaft 25 to rotate through the sixth transmission wheel 29, the third belt 30 and the fifth transmission wheel 28.

[0043] See also Figure 7 , Figure 9 The discharge assembly includes a material conveying cylinder 31 horizontally arranged on the frame 1 and a spiral conveying rod 32 arranged inside the material conveying cylinder 31 and having one end rotatably engaged with one end of the material conveying cylinder 31. The other end of the conveying cylinder 31 is connected to the side wall of the mixing box 4. An annular support seat 33 is provided inside the other end of the conveying cylinder 31. The other end of the spiral conveying rod 32 is located inside the annular support seat 33 and rotates with it. The bottom of one end of the conveying cylinder 31 is provided with a discharge port 34, one end of the spiral conveying rod 32 is provided with a No. 7 transmission wheel 35, one end of the No. 1 rotating shaft 5 is provided with a No. 8 transmission wheel 36, and the No. 7 transmission wheel 35 and the No. 8 transmission wheel 36 are connected by a fourth belt 37.

[0044] In this embodiment, since the other end of the conveying cylinder 31 is connected to the side wall of the mixing box 4, and a discharge port 34 is provided at the bottom of one end of the conveying cylinder 31, when the spiral conveying rod 32 inside the conveying cylinder 31 rotates, the material inside the mixing box 4 will be conveyed to the discharge port 34 by the rotating spiral conveying rod 32 in conjunction with the conveying cylinder 31 and discharged. The annular support seat 33 is used to ensure the stability of the spiral conveying rod 32 during rotation. Since the seventh drive wheel 35 and the eighth drive wheel 36 are connected by the fourth belt 37, when the first rotating shaft 5 rotates, the first rotating shaft 5 will drive the screw conveyor rod 32 to rotate through the eighth drive wheel 36, the fourth belt 37 and the seventh drive wheel 35.

[0045] A method for pulverizing soft soil and waste fly ash in roadbed using the pulverizer described above includes the following steps: Step 1: Based on the thickness and characteristics of the soft soil, select appropriate shallow foundation treatment, replacement treatment, and set up a drainage cushion layer; Step 2: Collect industrial waste fly ash and then pre-treat it by water washing to make the fly ash suitable as a material for improving roadbed soil. Step 3: Add the treated fly ash and roadbed soft soil into the crusher in a certain proportion, and crush and mix them to ensure uniform mixing; Step 4: Control the moisture content of the mixture. If the moisture content is too high, it can be reduced by drying or adding quicklime.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0047] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A soil pulverizer for improving soft soil by adding waste fly ash to roadbed soft soil, characterized in that: It comprises a frame (1) and a crushing box (2) arranged on the frame (1), a mesh plate (3) being arranged horizontally and slidably inside the crushing box (2), a mixing box (4) being fixedly connected to the bottom of the crushing box (2), and a feed port (201) being arranged on one side of the crushing box (2); A pulverizing assembly is disposed inside the pulverizing box (2), and a driving mechanism connected to the pulverizing assembly is disposed on the frame (1). During the operation of the driving mechanism, the pulverizing assembly pulverizes the material entering the pulverizing box (2) through the feed port (201); The frame (1) is provided with a screening component, the screening component being connected to the mesh plate (3) and the crushing component respectively, and the screening component will drive the mesh plate (3) to perform horizontal reciprocating movement under the action of the crushing component; The mixing box (4) is provided with a stirring assembly, and the stirring assembly is connected to the screening assembly via a transmission structure. During the operation of the screening assembly, the stirring assembly will follow the movement of the transmission structure to evenly mix the materials in the mixing box (4); The frame (1) is provided with a discharge assembly, which is respectively connected to the mixing box (4) and the crushing assembly. The discharge assembly will discharge the material in the mixing box (4) under the action of the crushing assembly.

2. The improved soil crusher for adding waste fly ash to soft soil of roadbed according to claim 1, characterized in that: The crushing assembly comprises a first rotating shaft (5) and a second rotating shaft (6) which are respectively arranged horizontally and rotatably on the crushing box (2), and the first rotating shaft (5) and the second rotating shaft (6) are arranged horizontally and symmetrically; A plurality of crushing teeth (7) are provided on the first rotating shaft (5) and the second rotating shaft (6), and the plurality of crushing teeth (7) are meshed with each other. A driving gear (8) and a driven gear (9) are provided at one end of the first rotating shaft (5) and the second rotating shaft (6), respectively, and the driving gear (8) and the driven gear (9) are meshed with each other.

3. The improved soil crusher for adding waste fly ash to soft soil of roadbed according to claim 2, characterized in that: The driving mechanism comprises a motor (10) arranged on the frame (1) and a first transmission wheel (11) arranged at the other end of the first rotating shaft (5); a second transmission wheel (12) is arranged at the output end of the motor (10); and the first transmission wheel (11) and the second transmission wheel (12) are connected via a first belt (13).

4. The improved soil crusher for adding waste fly ash to soft soil of roadbed according to claim 2, characterized in that: The screening assembly comprises a bracket (14) arranged on the frame (1) and a rotating rod (15) arranged horizontally and rotatably on the bracket (14), wherein a sleeve (16) is movably sleeved on the outer wall of the rotating rod (15); An L-shaped rod (17) is provided on the outer wall of the sleeve (16), and one end of the L-shaped rod (17) is fixedly connected to one end of the mesh plate (3).

5. The improved soil crusher for adding waste fly ash to soft soil of roadbed according to claim 4, characterized in that: The outer wall of the rotating rod (15) is provided with a track groove (1501), the inner wall of the sleeve (16) is rollingly engaged with a ball (18), and the ball (18) is also rollingly engaged in the track groove (1501); A third transmission wheel (19) is disposed at one end of the rotating rod (15), a fourth transmission wheel (20) is disposed at the other end of the second rotating shaft (6), and the third transmission wheel (19) and the fourth transmission wheel (20) are connected via a second belt (21).

6. The improved soil crusher for adding waste fly ash to soft soil of roadbed according to claim 4, characterized in that: The stirring assembly comprises a fixed rod (22) arranged horizontally in the mixing box (4) and a vertical rod (23) arranged vertically and rotatably at the bottom of the mixing box (4); The top end of the vertical rod (23) is rotatably matched with the fixed rod (22), and the outer wall of the vertical rod (23) is provided with a stirring rod (24).

7. The improved soil crusher for adding waste fly ash to soft soil of roadbed according to claim 6, characterized in that: The transmission structure comprises a transmission shaft (25) which is horizontally rotatably arranged on the frame (1) and a first bevel gear (26) which is arranged at one end of the transmission shaft (25); a second bevel gear (27) which meshes with the first bevel gear (26) is arranged at the bottom end of the vertical rod (23); A fifth transmission wheel (28) is disposed at the other end of the transmission shaft (25), a sixth transmission wheel (29) is disposed at the other end of the rotating rod (15), and the fifth transmission wheel (28) and the sixth transmission wheel (29) are connected via a third belt (30).

8. The improved soil crusher for adding waste fly ash to soft soil of roadbed according to claim 2, characterized in that: The material discharging assembly comprises a material conveying cylinder (31) horizontally arranged on the frame (1) and a spiral conveying rod (32) arranged inside the material conveying cylinder (31) and one end of which is rotatably matched with one end of the material conveying cylinder (31); The other end of the feeding cylinder (31) is in communication with the side wall of the mixing box (4), an annular support seat (33) is provided inside the other end of the feeding cylinder (31), and the other end of the spiral conveying rod (32) is located in the annular support seat (33) and the two are rotatably matched with each other; A discharge port (34) is provided at the bottom of one end of the feeding cylinder (31), a seventh transmission wheel (35) is provided at one end of the spiral conveying rod (32), an eighth transmission wheel (36) is provided at one end of the first rotating shaft (5), and the seventh transmission wheel (35) and the eighth transmission wheel (36) are connected via a fourth belt (37).

9. A method for crushing soft soil and waste fly ash on roadbed using the crusher according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: According to the thickness and characteristics of soft soil, select appropriate shallow foundation treatment, replace the filling, and set up drainage cushion layer; Step 2: Collect the industrial waste fly ash, and then pre-treat it by water washing to make the fly ash suitable as a material for improving roadbed soil; Step 3: Put the processed fly ash and roadbed soft soil into a crusher in a certain proportion, and crush and stir them through the crusher to ensure uniform mixing; Step 4: Control the moisture content of the mixture. If the moisture content is too high, you can reduce it by drying it in the sun or adding quicklime.

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