Anti-crack cold-recycling pavement structure

Abstract

The utility model relates to an anti-crack cold-recycled pavement structure, and relates to the field of recycled pavements. The pavement comprises a base pavement, a gravel layer is laid on the upper surface of the base pavement, grids are distributed on the upper side of the gravel layer, connecting columns embedded in the gravel layer are fixed to the lower sides of the grids, the lower ends of the connecting columns are fixed to the base pavement through fixing nails, the inner sides of cavities of the grids are filled with concrete, and a cold regeneration layer is laid on the upper sides of the grids. A bituminous pavement layer is laid on the upper side of the cold recycling layer, baffles are embedded in the positions, located on the left side and the right side of the gravel layer, of the upper surface of the base pavement, and connecting columns are fixed to the base pavement through fixing nails, so that the gravel layer is clamped between grids and the base pavement to form an integral structure, and the strength of the pavement structure is greatly improved; and meanwhile, concrete is filled in the grids to form a reinforcing layer with a high-strength structure, so that the strength of the pavement structure is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of regenerated pavement, and in particular to a crack-resistant cold regenerated pavement structure. Background Art

[0002] Cold recycled pavement is a new pavement structure formed by continuously milling and crushing the old pavement structure layers including the surface layer and part of the base layer at room temperature using special cold regeneration machinery, adding recycled materials, mixing, paving and rolling.

[0003] The Chinese patent with announcement number CN213596725U discloses a crack-resistant cold regenerated pavement structure, including a base pavement, a DSAM-20 permeable stress absorbing layer, a cold regenerated layer, an AC-25 lower layer, an AC-20 middle layer, an SMA-13 ​​upper layer and a reinforcement structure. The utility model sets a reinforcement structure at the bottom of the base pavement, and further reinforces and supports the DSAM-20 permeable stress absorbing layer through a reserved plate in conjunction with a fixed column and a crushed stone layer. The bottom concrete layer has good supporting capacity, thereby improving the overall compressive capacity and preventing the base pavement from being soft and reducing the overall strength. In addition, the water stop plate effectively prevents underground water from infiltrating upward into the DSAM-20 permeable stress absorbing layer and forming accumulation, thereby achieving the beneficial effect of further reinforcing the entire pavement and preventing the overall service life of the pavement from being affected by the soft base.

[0004] The above-mentioned anti-cracking cold regenerated pavement structure further reinforces and supports the DSAM-20 permeable stress absorption layer through the reserved plate, fixed columns and crushed stone layer, but it still mainly relies on the crushed stone layer for support. When the base pavement is soft, the crushed stone layer will deform along with the base pavement. The strength of the pavement structure that relies on the crushed stone layer for overall support needs to be further improved. Utility Model Content

[0005] In order to solve the problem that the pavement structure strength of the above-mentioned crack-resistant cold regenerated pavement structure that relies on a crushed stone layer for overall support needs to be further improved, the present application provides a crack-resistant cold regenerated pavement structure.

[0006] The present application provides a crack-resistant cold regeneration pavement structure adopts the following technical solution:

[0007] A crack-resistant cold regenerated pavement structure comprises a base pavement, the upper surface of the base pavement is paved with a crushed stone layer, a grid is arranged on the upper side of the crushed stone layer, a connecting column buried in the crushed stone layer is fixed on the lower side of the grid, and the lower end of the connecting column is fixed to the base pavement by a fixing nail, the inner side of the cavity of the grid is filled with concrete, and the upper side of the grid is paved with a cold regenerated layer, the upper side of the cold regenerated layer is paved with an asphalt pavement layer, baffles are embedded on the left and right sides of the upper surface of the base pavement at the crushed stone layer, and a drainage pipeline is arranged on the inner side of the cold regenerated layer.

[0008] By adopting the above technical solution, the connecting column is fixed to the base pavement by fixing nails so that the grid and the base pavement clamp the gravel layer in the middle to form an integral structure, which greatly improves the strength of the pavement structure. At the same time, concrete is filled in the grid to form a reinforcement layer with a high-strength structure, thereby further improving the strength of the pavement structure.

[0009] Optionally, evenly distributed ribs are fixed to the upper side of the grid, a mounting plate is fixed to the lower end of the connecting column, and mounting holes for inserting fixing nails are opened on the mounting plate.

[0010] By adopting the above technical solution, the connecting column is used to insert the fixing nails through the mounting plate, thereby achieving a fixed connection between the connecting column and the base road surface.

[0011] Optionally, a pressure plate is fixed to the upper end of the fixing nail, and evenly arranged barbs are fixed to the outer side of the fixing nail.

[0012] By adopting the above technical solution, the fixing nails are inserted into the base pavement and are fixed on the base pavement by dragging through the barbs.

[0013] Optionally, the drainage pipeline includes a main pipeline arranged transversely in the cold regeneration layer, a plurality of drainage pipes are fixed on the upper side of the main pipeline, and the upper ends of the drainage pipes extend to the inner side of the asphalt pavement layer.

[0014] By adopting the above technical solution, the water on the road surface is discharged downward into the main pipeline through the drainage pipe, and then drained to both sides of the road surface through the main pipeline.

[0015] Optionally, a mounting groove is provided at a position on the upper surface of the asphalt pavement layer corresponding to the drainage pipe, and a floor drain is installed inside the mounting groove.

[0016] By adopting the above technical solution, the floor drain is installed in the installation groove, and the garbage in the water is blocked by the floor drain.

[0017] Optionally, a water collecting cavity is provided on the lower surface of the floor drain, and a plurality of water permeable holes communicating with the water collecting cavity are provided on the upper surface of the floor drain.

[0018] By adopting the above technical solution, the floor drain is discharged downward through the water permeable hole, and the water discharged from the water permeable hole is collected in the water collecting chamber and discharged into the drainage pipe to complete the drainage.

[0019] Optionally, a drainage cavity is provided on the inner side of the baffle, and an interface communicating with the drainage cavity is provided near the upper end of a side of the baffle facing the gravel layer, and evenly arranged drainage holes are provided on a side of the baffle away from the interface.

[0020] By adopting the above technical solution, the baffle collects the water discharged from the main pipe through the drainage cavity and drains it into the soil on both sides of the road surface through the evenly arranged drainage holes.

[0021] In summary, this application includes the following beneficial technical effects:

[0022] The connecting column in the utility model is fixed to the base road surface by fixing nails so that the grid and the base road surface clamp the gravel layer in the middle to form an integral structure, which greatly improves the strength of the road surface structure. At the same time, concrete is filled in the grid to form a reinforcement layer with a high-strength structure, thereby further improving the strength of the road surface structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a cross-sectional view in an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of a grid in an embodiment of the present application;

[0025] Figure 3 is a schematic diagram of a fixing nail in an embodiment of the present application;

[0026] Figure 4 is a schematic diagram of a drainage pipeline in an embodiment of the present application;

[0027] Figure 5 is a schematic diagram of an asphalt pavement layer in an embodiment of the present application;

[0028] Figure 6 is a schematic diagram of a floor drain in an embodiment of the present application;

[0029] Figure 7 It is a schematic diagram of a baffle in an embodiment of the present application.

[0030] Explanation of the reference numerals: 1. base pavement; 2. asphalt pavement layer; 21. mounting groove; 3. cold regeneration layer; 4. concrete; 5. grid; 51. rib; 52. connecting column; 53. mounting plate; 6. drainage pipeline; 61. main pipeline; 62. drainage pipe; 7. floor drain; 71. water-permeable hole; 72. water collecting chamber; 8. baffle; 81. interface; 82. drainage chamber; 83. drainage hole; 9. fixing nail; 91. pressure plate; 92. barb; 10. gravel layer. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings.

[0032] The present application discloses a crack-resistant cold regenerated pavement structure. Figure 1 and Figure 2 , including a base pavement 1, a crushed stone layer 10 is laid on the upper surface of the base pavement 1, and a grid 5 is arranged on the upper side of the crushed stone layer 10, a connecting column 52 buried in the crushed stone layer 10 is fixed on the lower side of the grid 5, and the lower end of the connecting column 52 is fixed to the base pavement 1 by a fixing nail 9, and the connecting column 52 is fixed to the base pavement 1 by the fixing nail 9 so that the grid 5 and the base pavement 1 clamp the crushed stone layer 10 in the middle to form an integral structure, which greatly improves the strength of the pavement structure, and the inner side of the cavity of the grid 5 is filled with concrete 4, and the concrete 4 is filled in the grid 5 to form a reinforcement layer with a high-strength structure, In order to further improve the strength of the pavement structure, a cold regeneration layer 3 is laid on the upper side of the grid 5. The cold regeneration layer 3 is made by adding part of the new aggregate to the crushed old road material, and adding a certain amount of regeneration agent (emulsified asphalt, foamed asphalt) or chemical stabilizer (cement, fly ash or lime, etc.) and additives in proportion and stirring and mixing. An asphalt pavement layer 2 is laid on the upper side of the cold regeneration layer 3. Baffles 8 are embedded on the left and right sides of the crushed stone layer 10 on the upper surface of the base pavement 1. The baffles 8 block the two sides of the pavement to prevent collapse to both sides. A drainage pipe 6 is arranged on the inner side of the cold regeneration layer 3 to drain the surface water on the road surface.

[0033] Reference Figure 2 The upper side of the grid 5 is fixed with evenly distributed ribs 51 to better strengthen the fixation of the cold regenerated layer 3. The lower end of the connecting column 52 is fixed with a mounting plate 53, and the mounting plate 53 is provided with mounting holes for inserting the fixing nails 9. The connecting column 52 is used for inserting the fixing nails 9 through the mounting plate 53 to achieve a fixed connection between the connecting column 52 and the base pavement 1.

[0034] Reference Figure 3 A pressure plate 91 is fixed to the upper end of the fixing nail 9 for pressing the mounting plate 53, and evenly arranged barbs 92 are fixed to the outer side of the fixing nail 9. The fixing nail 9 is inserted into the base pavement 1 and is fixed on the base pavement 1 by dragging with the barbs 92.

[0035] Reference Figure 4 The drainage pipeline 6 includes a main pipeline 61 arranged horizontally in the cold regeneration layer 3, and a plurality of drainage pipes 62 are fixed on the upper side of the main pipeline 61, and the upper ends of the drainage pipes 62 extend to the inner side of the asphalt pavement layer 2. The water on the road surface is discharged downward into the main pipeline 61 through the drainage pipes 62, and the water is discharged to both sides of the road surface through the main pipeline 61.

[0036] Reference Figure 5 and Figure 6 A mounting groove 21 is provided at a position on the upper surface of the asphalt pavement layer 2 corresponding to the drainage pipe 62, and a floor drain 7 is installed on the inner side of the mounting groove 21. A water collecting cavity 72 is provided on the lower surface of the floor drain 7, and a plurality of water permeable holes 71 connected with the water collecting cavity 72 are provided on the upper surface of the floor drain 7. The floor drain 7 is discharged downward through the water permeable holes 71, and the water discharged from the water permeable holes 71 is collected in the water collecting cavity 72 and discharged into the drainage pipe 62 to complete the drainage. The mounting groove 21 is used to install the floor drain 7, and the garbage in the water is blocked by the floor drain 7.

[0037] Reference Figure 7 A drainage cavity 82 is provided on the inner side of the baffle plate 8, and an interface 81 connected to the drainage cavity 82 is provided near the upper end of the side of the baffle plate 8 facing the gravel layer 10, and evenly arranged drainage holes 83 are provided on the side of the baffle plate 8 away from the interface 81. The baffle plate 8 collects the water discharged from the main pipeline 61 through the drainage cavity 82 and drains it into the soil on both sides of the road surface through the evenly arranged drainage holes 83.

[0038] The implementation principle of a crack-resistant cold regenerated pavement structure in the embodiment of the present application is as follows: when constructing the cold regenerated pavement, the worn surface layer on the base pavement 1 is removed by milling and crushing with a construction machine, and then the connecting column 52 is fixed to the base pavement 1 by a fixing nail 9, and then a crushed stone layer 10 is laid between the base pavement 1 and the grid 5, and then concrete 4 is poured in the grid 5 to form an integral structure to reinforce the old road material, and then the old road material is crushed and part of the new aggregate is added, and a certain amount of regeneration agent is added in proportion. (emulsified asphalt, foamed asphalt) or chemical stabilizer (cement, fly ash or lime, etc.) and additives are stirred and mixed and laid on the upper side of the grid 5 to form a cold regeneration layer 3, and finally new asphalt is laid on the cold regeneration layer 3 to form an asphalt pavement layer 2. When it rains, the rainwater on the road surface flows into the main pipe 61 through the floor drain 7 and flows to the left and right sides. The baffle 8 collects the water discharged from the main pipe 61 through the drainage cavity 82 and drains it into the soil on both sides of the road surface through the evenly arranged drainage holes 83, thereby completing the drainage of the road surface.

[0039] 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 crack-resistant cold regenerated pavement structure, comprising a base pavement (1), characterized in that: The upper surface of the base pavement (1) is paved with a crushed stone layer (10), and a grid (5) is arranged on the upper side of the crushed stone layer (10); a connecting column (52) buried in the crushed stone layer (10) is fixed on the lower side of the grid (5), and the lower end of the connecting column (52) is fixed to the base pavement (1) by a fixing nail (9); the inner side of the cavity of the grid (5) is filled with concrete (4), and the upper side of the grid (5) is paved with a cold regeneration layer (3), and the upper side of the cold regeneration layer (3) is paved with an asphalt pavement layer (2); baffles (8) are embedded on the upper surface of the base pavement (1) at the left and right sides of the crushed stone layer (10), and a drainage pipeline (6) is arranged on the inner side of the cold regeneration layer (3).

2. The anti-cracking cold regenerated pavement structure according to claim 1, characterized in that: The upper side of the grid (5) is fixed with evenly distributed convex ribs (51), the lower end of the connecting column (52) is fixed with a mounting plate (53), and the mounting plate (53) is provided with mounting holes for inserting fixing nails (9).

3. The anti-cracking cold regenerated pavement structure according to claim 2 is characterized in that: A pressing plate (91) is fixed to the upper end of the fixing nail (9), and evenly arranged barbs (92) are fixed to the outer side of the fixing nail (9).

4. The anti-cracking cold regenerated pavement structure according to claim 1, characterized in that: The drainage pipeline (6) comprises a main pipeline (61) arranged transversely in the cold regeneration layer (3), a plurality of drainage pipes (62) are fixed on the upper side of the main pipeline (61), and the upper ends of the drainage pipes (62) extend to the inner side of the asphalt pavement layer (2).

5. The anti-cracking cold regenerated pavement structure according to claim 4, characterized in that: An installation groove (21) is provided at a position on the upper surface of the asphalt pavement layer (2) corresponding to the drainage pipe (62), and a floor drain (7) is installed inside the installation groove (21).

6. The anti-cracking cold regenerated pavement structure according to claim 5, characterized in that: The lower surface of the floor drain (7) is provided with a water collection cavity (72), and the upper surface of the floor drain (7) is provided with a plurality of water permeable holes (71) which are in communication with the water collection cavity (72).

7. The anti-cracking cold regenerated pavement structure according to claim 1, characterized in that: A drainage cavity (82) is provided on the inner side of the baffle plate (8), and an interface (81) communicating with the drainage cavity (82) is provided near the upper end of a side of the baffle plate (8) facing the gravel layer (10), and drainage holes (83) arranged evenly are provided on a side of the baffle plate (8) away from the interface (81).

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