Phosphogypsum pavement base layer paving method and device

Abstract

The invention discloses an ardealite pavement base course paving method and a device thereof, and belongs to the technical field of roadbed paving, the device comprises a paving device main body driven by a driving device, the paving device main body comprises a paving frame, the paving frame is provided with a lower paving unit for paving modified ardealite lightweight aggregate, and the paving frame is provided with a lower paving unit for paving the modified ardealite lightweight aggregate. The upper paving unit is used for paving roadbed powder, and a high-frequency vibration unit for vibrating the roadbed is arranged on the paving frame. According to the method, the existing phosphogypsum roadbed is designed, the prepared modified phosphogypsum lightweight aggregate is firstly paved on the gravel through the paving device to form the modified phosphogypsum lightweight aggregate layer, and then the phosphogypsum powder is paved on the modified phosphogypsum lightweight aggregate layer to form the modified phosphogypsum lightweight aggregate layer. And the modified phosphogypsum lightweight aggregate and the roadbed powder are vibrated through the high-frequency vibration unit to ensure that the phosphogypsum powder and the roadbed are uniformly mixed, so that hollowing is avoided, the strength of the pavement is remarkably enhanced, and the service life of the pavement is remarkably prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of roadbed paving, and in particular to a phosphogypsum road base paving method and a device thereof. Background Art

[0002] Phosphogypsum belongs to the second category of general industrial solid waste, which can be rendered harmless and utilized as a resource through technological treatment.

[0003] The current phosphogypsum roadbed paving technology is still immature. Phosphogypsum powder is often directly paved on crushed stone or base pavement, and then rolled by a roller. In this case, the phosphogypsum powder is mixed with cementitious materials and curing agents. When rolling, it will solidify directly on the upper layer of crushed stone. When the solidified phosphogypsum layer is used in the later stage, due to insufficient direct adhesion with the crushed stone and the inability of the phosphogypsum powder to fill the crushed stone, there will be gaps in the crushed stone, which will affect the viscosity and support effect, resulting in voids in the roadbed, affecting the later strength and service life. Based on this, a phosphogypsum road base paving method and device are proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that due to insufficient direct adhesion with crushed stone and the inability of phosphogypsum powder to fill crushed stone, there are gaps in the crushed stone, which will affect the adhesion and supporting effect, cause voids in the roadbed, and affect the later strength and service life. A phosphogypsum road base paving method and device are proposed. The prepared modified phosphogypsum light aggregate is first paved on the crushed stone by a paving device to form a modified phosphogypsum light aggregate layer, and then the phosphogypsum powder is paved on the modified phosphogypsum light aggregate layer, and the modified phosphogypsum light aggregate and the roadbed powder are vibrated by a high-frequency vibration unit to ensure that the phosphogypsum powder is mixed evenly with the roadbed, thereby avoiding hollowing and significantly enhancing the strength and service life of the road surface.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A phosphogypsum road base paving method and device thereof, comprising the following steps:

[0007] S1. Processing of phosphogypsum raw materials: the modified phosphogypsum raw materials are subjected to mechanical screening to remove impurities, and are classified and screened again to be screened into phosphogypsum powder and phosphogypsum granules according to the preparation particle size requirements, and the phosphogypsum granules are dried and crushed to prepare phosphogypsum powder;

[0008] S2. Preparation of roadbed aggregate: Mix one portion of phosphogypsum aggregate, cement and slag powder in a certain proportion and solidify into large aggregate blocks, crush and screen the solidified block aggregate to make modified phosphogypsum lightweight aggregate, and select a certain amount of crushed stone aggregate;

[0009] S3. Preparation of roadbed powder: adding phosphogypsum powder to a cementitious material, a curing agent, and an activator to mix to prepare a mixed powder, and adding a certain proportion of water to the mixed mixture to prepare a roadbed powder containing a certain amount of water;

[0010] S4. Roadbed paving: Spread the crushed stone aggregate on the ground in a layer, evenly spread the modified phosphogypsum lightweight aggregate on top of the crushed stone aggregate through a paving device, and evenly spread the mixed roadbed powder on the surface of the paved modified phosphogypsum lightweight aggregate to form a paved roadbed base surface;

[0011] S5. Vibrating and leveling the roadbed: by moving the paving device, the modified phosphogypsum lightweight aggregate and the roadbed powder are vibrated by a high-frequency vibration unit arranged on the paving device, and the roadbed powder is evenly filled around the modified phosphogypsum lightweight aggregate, and compacted by the paving device;

[0012] S6. Roadbed maintenance inspection: Carry out daily maintenance on the paved roadbed and conduct performance inspection on the roadbed after maintenance.

[0013] Preferably, the gel material in S3 includes one or more of cement, fly ash and mineral admixtures.

[0014] A phosphogypsum pavement base paving device comprises a paving device body driven by a driving device, the paving device body comprises a paving frame, the paving frame is provided with a lower paving unit for paving modified phosphogypsum lightweight aggregate, and an upper paving unit for paving roadbed powder, the paving frame is provided with a high-frequency vibration unit for vibrating the roadbed.

[0015] Preferably, the lower paving unit comprises an aggregate containing trough installed on a paving frame, a feeding plate is provided on the paving frame, the feeding plate is connected to the aggregate containing trough via a conveying trough plate, and a reciprocating conveying plate is provided on the feeding plate via a reciprocating driving member.

[0016] Preferably, the upper laying unit includes an inline conveying plate and a funnel conveying trough connected to the inline conveying plate, the funnel conveying trough is provided with an equalizing conveying blade, the laying frame is provided with a driving motor, and the output end of the driving motor is connected to the equalizing conveying blade through a driving shaft.

[0017] Preferably, the reciprocating drive member includes a conflicting triangle block fixedly connected to the reciprocating conveying plate, the other end of the reciprocating conveying plate is connected to the feeding plate through a spring member, the outer side wall of the output end of the driving motor is fixedly connected to a driving gear, the driving gear is connected to a deflection transmission disk through a belt drive, the deflection transmission disk is connected to a vertical reciprocating rod through a deflection rod, and the vertical reciprocating rod is fixedly connected to a driving triangle block that conflicts with the conflicting triangle block.

[0018] Preferably, the spring member comprises a rectangular through-hole opened on the conveying trough plate, the reciprocating conveying plate extends outward through the rectangular through-hole and is fixedly connected with a spring plate, and the spring plate is connected to the conveying trough plate via a resisting spring.

[0019] Preferably, the high-frequency vibration unit comprises a high-frequency vibrator fixedly connected via a load-bearing rotating shaft, a rolling wheel is sleeved on the outer side wall of the load-bearing rotating shaft, and a plurality of vibration plug posts are evenly arranged on the rolling wheel.

[0020] Preferably, the output end of the high-frequency vibrator is connected to a vibration seat, the vibration plug is movably connected to the rolling wheel through a sleeve spring plate, and the sleeve spring plate is connected to the inner wall of the rolling wheel through a sleeve spring.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention is designed for the current phosphogypsum roadbed. The prepared modified phosphogypsum light aggregate is first paved on top of the crushed stone through a paving device to form a modified phosphogypsum light aggregate layer, and then the phosphogypsum powder is paved on top of the modified phosphogypsum light aggregate layer. The modified phosphogypsum light aggregate and the roadbed powder are vibrated by a high-frequency vibration unit to ensure that the phosphogypsum powder and the roadbed are evenly mixed, thereby avoiding hollowing and significantly enhancing the strength and life of the road surface.

[0023] 2. This scheme is to pave modified phosphogypsum light aggregate made of phosphogypsum aggregate, cement and slag powder on top of the crushed stone aggregate, and then pave phosphogypsum powder on top of the modified phosphogypsum light aggregate, so that the roadbed materials of the same material can be mixed and pasted together, thereby improving the adhesion of the road surface and roadbed and ensuring the roadbed strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A flow chart of a phosphogypsum pavement base paving method proposed by the present invention;

[0025] Figure 2 This is a schematic diagram of the main structure of a phosphogypsum road base paving device proposed by the present invention;

[0026] Figure 3 This is a schematic structural diagram of a lower paving unit in a phosphogypsum pavement base paving device proposed by the present invention;

[0027] Figure 4 This is a schematic structural diagram of an upper paving unit in a phosphogypsum pavement base paving device proposed by the present invention;

[0028] Figure 5 This is a schematic structural diagram of a high-frequency vibration unit in a phosphogypsum pavement base paving device proposed by the present invention;

[0029] Figure 6 This is a schematic structural diagram of a reciprocating driving member in a phosphogypsum pavement base paving device proposed by the present invention;

[0030] Figure 7 This is a schematic diagram of the structure inside a rolling wheel in a phosphogypsum pavement base paving device proposed by the present invention.

[0031] In the figure: 1. laying frame; 2. aggregate holding trough; 3. feeding plate; 4. conveying trough plate; 5. reciprocating conveying plate; 6. in-line conveying plate; 7. funnel conveying trough; 8. evenly distributed conveying blades; 9. driving motor; 10. abutting triangle block; 11. driving gear; 12. deflection transmission plate; 13. deflection rod; 14. vertical reciprocating rod; 15. driving triangle block; 16. spring plate; 17. high-frequency vibrator; 18. rolling wheel; 19. vibrating plug column; 20. vibrating seat; 21. sleeve spring plate. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example, see Figures 1 to 7 A method and device for paving a phosphogypsum road base layer, comprising the following steps:

[0036] Treatment of phosphogypsum raw materials: The modified phosphogypsum raw materials are subjected to mechanical screening to remove impurities, and are classified and screened again to be screened into phosphogypsum powder and phosphogypsum granules according to the preparation particle size requirements. The phosphogypsum granules are dried and crushed to prepare phosphogypsum powder;

[0037] Preparation of roadbed aggregate: Mix one part of phosphogypsum aggregate, cement and slag powder in a certain proportion and solidify into large aggregate. Crush and screen the solidified block aggregate to make modified phosphogypsum lightweight aggregate, and select a certain amount of crushed stone aggregate;

[0038] Preparation of roadbed powder: adding phosphogypsum powder to cementitious material, curing agent and activator to mix to prepare mixed powder, and adding a certain proportion of water to the mixed mixture to prepare roadbed powder containing a certain amount of water;

[0039] Roadbed paving: Spread the crushed stone aggregate on the ground, evenly spread the modified phosphogypsum lightweight aggregate on top of the crushed stone aggregate through the paving device, and evenly spread the mixed roadbed powder on the surface of the paved modified phosphogypsum lightweight aggregate to form a paved roadbed base surface;

[0040] Roadbed vibration and leveling: Through the movement of the paving device, the modified phosphogypsum lightweight aggregate and the roadbed powder are vibrated by the high-frequency vibration unit arranged on the paving device, and the roadbed powder is evenly filled around the modified phosphogypsum lightweight aggregate, and compacted by the paving device;

[0041] Roadbed maintenance inspection: Carry out daily maintenance on the paved roadbed and conduct performance inspection on the roadbed after maintenance.

[0042] The medium gel material includes one or more of cement, fly ash and mineral admixtures.

[0043] A phosphogypsum road base paving device, comprising a paving device body driven by a driving device, the paving device body comprising a paving frame 1, the paving frame 1 is provided with a lower paving unit for paving modified phosphogypsum lightweight aggregate, further, the lower paving unit comprises an aggregate holding trough 2 installed on the paving frame 1, the paving frame 1 is provided with a feeding plate 3, the feeding plate 3 is connected to the aggregate holding trough 2 through a conveying trough plate 4, and a reciprocating conveying plate 5 is provided on the feeding plate 3 through a reciprocating driving member;

[0044] Furthermore, the reciprocating drive member includes a conflicting triangle block 10 fixedly connected to the reciprocating conveying plate 5, the other end of the reciprocating conveying plate 5 is connected to the feeding plate 3 through a spring member, a driving gear 11 is fixedly connected to the outer wall of the output end of the driving motor 9, the driving gear 11 is connected to a deflection transmission disk 12 through a belt drive, the deflection transmission disk 12 is connected to a vertical reciprocating rod 14 through a deflection rod 13, and the vertical reciprocating rod 14 is fixedly connected to a driving triangle block 15 that conflicts with the conflicting triangle block 10.

[0045] Furthermore, the spring member includes a rectangular through-hole opened on the conveying trough plate 4, the reciprocating conveying plate 5 extends outward through the rectangular through-hole and is fixedly connected with a spring plate 2116, and the spring plate 2116 is connected to the conveying trough plate 4 through a resisting spring;

[0046] Furthermore, the upper paving unit includes an inline conveying plate 6 and a funnel conveying trough 7 connected to the inline conveying plate 6, an evenly distributing conveying blade 8 is arranged in the funnel conveying trough 7, and a driving motor 9 is arranged on the paving frame 1, and the output end of the driving motor 9 is connected to the evenly distributing conveying blade 8 through a driving shaft.

[0047] And an upper paving unit for paving the roadbed powder, a high-frequency vibration unit for vibrating the roadbed is arranged on the paving frame 1, the high-frequency vibration unit includes a high-frequency vibrator 17 fixedly connected by a load-bearing shaft, a rolling wheel 18 is sleeved on the outer wall of the load-bearing shaft, and a plurality of vibration plugs 19 are evenly arranged on the rolling wheel 18.

[0048] Furthermore, the output end of the high-frequency vibrator 17 is connected to a vibration seat 20, and the vibration plug 19 is movably connected to the rolling wheel 18 through a sleeve spring plate 21, and the sleeve spring plate 21 is connected to the inner wall of the rolling wheel 18 through a sleeve spring.

[0049] The present invention is designed for the current phosphogypsum roadbed. The prepared modified phosphogypsum light aggregate is first paved on top of crushed stones through a paving device to form a modified phosphogypsum light aggregate layer. Then, phosphogypsum powder is paved on top of the modified phosphogypsum light aggregate layer. The modified phosphogypsum light aggregate and the roadbed powder are vibrated by a high-frequency vibration unit to ensure that the phosphogypsum powder and the roadbed are evenly mixed, thereby avoiding hollowing and significantly enhancing the strength and life of the road surface.

[0050] By paving modified phosphogypsum light aggregate made of phosphogypsum aggregate, cement and slag powder on top of the crushed stone aggregate, and then paving phosphogypsum powder on top of the modified phosphogypsum light aggregate, the roadbed materials of the same material can be mixed and pasted together, thereby improving the adhesion of the road surface and roadbed and ensuring the roadbed strength.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for paving a phosphogypsum road base, characterized in that: The following steps are involved: S1. Processing of phosphogypsum raw materials: the modified phosphogypsum raw materials are subjected to mechanical screening to remove impurities, and are classified and screened again to be screened into phosphogypsum powder and phosphogypsum granules according to the preparation particle size requirements, and the phosphogypsum granules are dried and crushed to prepare phosphogypsum powder; S2. Preparation of roadbed aggregate: Mix one portion of phosphogypsum aggregate, cement and slag powder in a certain proportion and solidify into large aggregate blocks, crush and screen the solidified block aggregate to make modified phosphogypsum lightweight aggregate, and select a certain amount of crushed stone aggregate; S3. Preparation of roadbed powder: adding phosphogypsum powder to a cementitious material, a curing agent, and an activator to mix to prepare a mixed powder, and adding a certain proportion of water to the mixed mixture to prepare a roadbed powder containing a certain amount of water; S4. Roadbed paving: Spread the crushed stone aggregate on the ground in a layer, evenly spread the modified phosphogypsum lightweight aggregate on top of the crushed stone aggregate through a paving device, and evenly spread the mixed roadbed powder on the surface of the paved modified phosphogypsum lightweight aggregate to form a paved roadbed base surface; S5. Vibrating and leveling the roadbed: by moving the paving device, the modified phosphogypsum lightweight aggregate and the roadbed powder are vibrated by a high-frequency vibration unit arranged on the paving device, and the roadbed powder is evenly filled around the modified phosphogypsum lightweight aggregate, and compacted by the paving device; S6. Roadbed maintenance inspection: Carry out daily maintenance on the paved roadbed and conduct performance inspection on the roadbed after maintenance.

2. A phosphogypsum pavement base paving method according to claim 1, characterized in that: The gel material in S3 includes one or more of cement, fly ash and mineral admixtures.

3. A phosphogypsum pavement base paving device based on the phosphogypsum pavement base paving method according to claims 1-2, characterized in that: The invention comprises a paving device body driven by a driving device, the paving device body comprising a paving frame (1), the paving frame (1) being provided with a lower paving unit for paving modified phosphogypsum lightweight aggregate, and an upper paving unit for paving roadbed powder, the paving frame (1) being provided with a high-frequency vibration unit for vibrating the roadbed.

4. A phosphogypsum pavement base paving device according to claim 3, characterized in that: The lower laying unit comprises an aggregate containing trough (2) mounted on a laying frame (1), a feeding plate (3) is arranged on the laying frame (1), the feeding plate (3) is connected to the aggregate containing trough (2) via a conveying trough plate (4), and a reciprocating conveying plate (5) is arranged on the feeding plate (3) via a reciprocating driving member.

5. A phosphogypsum pavement base paving device according to claim 4, characterized in that: The upper laying unit comprises an inline conveying plate (6) and a funnel conveying trough (7) connected to the inline conveying plate (6), wherein an evenly distributed conveying blade (8) is arranged in the funnel conveying trough (7), and a driving motor (9) is arranged on the laying frame (1), wherein an output end of the driving motor (9) is connected to the evenly distributed conveying blade (8) via a driving shaft.

6. A phosphogypsum road base paving device according to claim 5, characterized in that: The reciprocating drive member comprises a conflicting triangle block (10) fixedly connected to a reciprocating conveying plate (5); the other end of the reciprocating conveying plate (5) is connected to a feeding plate (3) via a spring member; the outer side wall of the output end of the driving motor (9) is fixedly connected to a driving gear (11); the driving gear (11) is connected to a deflection transmission disk (12) via a belt drive; the deflection transmission disk (12) is connected to a vertical reciprocating rod (14) via a deflection rod (13); the vertical reciprocating rod (14) is fixedly connected to a driving triangle block (15) that conflicts with the conflicting triangle block (10).

7. A phosphogypsum road base paving device according to claim 6, characterized in that: The spring member comprises a rectangular through-hole formed on the conveying trough plate (4); the reciprocating conveying plate (5) extends outward through the rectangular through-hole and is fixedly connected with a spring plate (16); the spring plate (16) is connected to the conveying trough plate (4) via a resisting spring.

8. A phosphogypsum road base paving device according to claim 7, characterized in that: The high-frequency vibration unit comprises a high-frequency vibrator (17) fixedly connected via a bearing shaft, a rolling wheel (18) is sleeved on the outer wall of the bearing shaft, and a plurality of vibration plug posts (19) are evenly arranged on the rolling wheel (18).

9. A phosphogypsum road base paving device according to claim 8, characterized in that: The output end of the high-frequency vibrator (17) is connected to a vibration seat (20), the vibration plug post (19) is movably connected to the rolling wheel (18) via a sleeve spring plate (21), and the sleeve spring plate (21) is connected to the inner side wall of the rolling wheel (18) via a sleeve spring.

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