Composite pavement structure

Abstract

The utility model relates to the technical field of pavement structures, in particular to a composite pavement structure. Comprising a subbase layer, a construction waste recycled material layer, a strength reinforcing layer, a drainage ditch, a fiber concrete layer, a connecting layer and an asphalt macadam mixture layer. The subbase layer, the construction waste recycled material layer, the strength reinforcing layer, the fiber concrete layer, the connecting layer and the asphalt macadam mixture layer are sequentially arranged from bottom to top, the section of the strength reinforcing layer is of a structure with the high middle and the two low sides, and the drainage ditches are formed in the upper surfaces of the lowest points of the two sides of the strength reinforcing layer. The problem that an existing pavement is prone to cracking is solved, meanwhile, the smoothness of the pavement is guaranteed, even if the aggregate is exposed, vehicles passing through the top layer cannot be damaged, and the safety attribute of the pavement is improved. The main reason of the utility model is the composite pavement structure.

Description

Technical Field

[0001] The utility model relates to the technical field of pavement structures, and more specifically to a composite pavement structure. Background Art

[0002] In the highway construction industry, after the new highway is completed and put into operation, some common quality problems will lead to road surface diseases, such as road damage, deformation and other defects, which seriously affect the durability and service life of the road surface.

[0003] Failure to drain water in rainy days can easily cause waterlogging on the road, which can easily lead to traffic accidents and become a major safety hazard that needs to be paid attention to during road construction. Irregular aggregate fragments are of two types: rounded corners and angled corners. Generally, aggregates are not distinguished. However, in fact, if traditional angled corner aggregates are filled evenly, the top surface may be exposed at right angles, which not only causes uneven road surface, but also may damage the wheels on the top side. Utility Model Content

[0004] In order to overcome the deficiencies in the above-mentioned prior art, the utility model provides a composite pavement structure. The pavement structure can achieve effective drainage, improve road surface waterlogging, solve the problem of cracks in the existing pavement, and ensure the flatness of the pavement. Even if the aggregate is exposed, it will not cause damage to vehicles passing through the top layer, thereby improving the safety attributes of the pavement.

[0005] In order to achieve the above technical effects, the technical solution adopted by the utility model is:

[0006] A composite pavement structure comprises a subbase, a layer of recycled construction waste, a strength reinforcement layer, a drainage ditch, a fiber concrete layer, a connecting layer and an asphalt gravel mixture layer; the subbase, the layer of recycled construction waste, the strength reinforcement layer, the fiber concrete layer, the connecting layer and the asphalt gravel mixture layer are arranged in sequence from bottom to top, the cross-section of the strength reinforcement layer is a structure with a high middle and low sides, and the drainage ditch is arranged on the upper surface of the lowest point on both sides of the strength reinforcement layer.

[0007] A slurry sealing layer is arranged between the construction waste recycled material layer and the strength reinforcement layer.

[0008] A rubber asphalt waterproof layer is laid on the strength reinforcement layer, the rubber asphalt waterproof layer is laminated on the upper surface of the strength reinforcement layer, the drainage ditch is arranged on the upper part of the rubber asphalt waterproof layer, and the fiber concrete layer is covered on the upper part of the rubber asphalt waterproof layer and the drainage ditch.

[0009] The asphalt macadam mixture layer comprises a lower mixture layer and an upper mixture layer, wherein the lower mixture layer is arranged above the connecting layer, and the upper mixture layer is arranged above the lower mixture layer.

[0010] The surface of the upper mixed material layer is sprayed with an organic silicon penetration layer.

[0011] The lower mixed material layer is filled with deep aggregate, and the upper mixed material layer is filled with top aggregate. The deep aggregate is angular aggregate, and the top aggregate is rounded aggregate.

[0012] The drainage ditch is communicated with the inner space of the fiber concrete layer.

[0013] The fiber concrete layer is made of stainless steel fibers and cement base material.

[0014] The connecting layer is made of glass fiber geogrid.

[0015] The deep aggregate is diabase crushed blocks, and the top aggregate is made of diabase crushed blocks after rounding.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The setting of the construction waste recycled material layer recycles the waste resources and uses them in the road base after reasonable processing, which not only solves the pollution and safety hazards of construction waste that is difficult to handle, but also reduces the cost of building materials; the setting of the rubber asphalt waterproof layer can prevent the accumulation of water from continuing to penetrate downward, protect the stability of the roadbed, and cooperate with the drainage ditch to achieve efficient drainage; the fiber concrete layer reduces the brittleness of cement and weakens the rigid constraint, and the glass fiber geogrid of the connecting layer makes the cement have better ductility and reduces the possibility of cracks; the setting of the lower mixture layer filling the deep aggregate can increase the contact area between the right-angle fragments of the deep aggregate and the asphalt mixture, ensuring the stability after filling, and the setting of the top aggregate filling in the upper mixture layer makes its exposed part rounded, so that the asphalt mixture filled around the rounded part tends to be smooth on the top layer, ensuring the flatness of the road surface, and even if it is exposed, it will not cause damage to the vehicles passing through the top layer; the setting of the silicone penetration layer can effectively close the fine cracks of the asphalt pavement. The pavement structure effectively solves the problems of insufficient pavement strength, easy cracking, and damage to vehicles passing on the road. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a partial schematic diagram of the lower mixed material layer of the utility model;

[0020] Figure 3 This is a schematic diagram of the upper mixed material layer of the utility model;

[0021] In the figure: 1 is the base layer, 2 is the construction waste recycled material layer, 21 is the slurry sealing layer, 3 is the strength reinforcement layer, 4 is the rubber asphalt waterproof layer, 5 is the drainage ditch, 6 is the fiber concrete layer, 7 is the connecting layer, 8 is the lower mixed material layer, 9 is the upper mixed material layer, 10 is the deep aggregate, and 11 is the top aggregate. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0024] like Figures 1 to 3 As shown, a composite pavement structure includes a subbase layer 1, a construction waste recycled material layer 2, a strength reinforcement layer 3, a drainage ditch 5, a fiber concrete layer 6, a connecting layer 7 and an asphalt gravel mixture layer; the subbase layer 1, the construction waste recycled material layer 2, the strength reinforcement layer 3, the fiber concrete layer 6, the connecting layer 7 and the asphalt gravel mixture layer are arranged in sequence from bottom to top, and the cross-section of the strength reinforcement layer 3 is a structure with a high middle and low sides. The strength reinforcement layer 3 is reinforced with concrete to form a slope structure that is conducive to drainage, and the drainage ditch 5 is arranged on the upper surface of the lowest point on both sides of the strength reinforcement layer 3.

[0025] Preferably, a slurry sealing layer 21 is provided between the construction waste recycled material layer 2 and the strength reinforcement layer 3. The slurry sealing layer 21 allows the construction waste recycled material layer 2 and the strength reinforcement layer 3 to be better connected.

[0026] Preferably, a rubber asphalt waterproof layer 4 is laid on the strength reinforcement layer 3, the rubber asphalt waterproof layer 4 is laminated on the upper surface of the strength reinforcement layer 3, the drainage ditch 5 is arranged on the upper part of the rubber asphalt waterproof layer 4, and the fiber concrete layer 6 is covered on the upper part of the rubber asphalt waterproof layer 4 and the drainage ditch 5. The rubber asphalt waterproof layer 4 is paved with a rubber modified asphalt waterproofing membrane, which can prevent the accumulated water from continuing to penetrate downward, and can guide the seepage water to be introduced into the drainage ditch 5.

[0027] Preferably, the asphalt macadam mixture layer comprises a lower mixture layer 8 and an upper mixture layer 9, wherein the lower mixture layer 8 is arranged above the connecting layer 7, and the upper mixture layer 9 is arranged above the lower mixture layer 8. The asphalt macadam mixture layer adopts SBS ID type modified asphalt.

[0028] Preferably, the surface of the upper mixed material layer 9 is sprayed with an organic silicon penetration layer 12. The organic silicon penetration layer 12 is made of silane emulsion, so that the pavement structure has better bonding performance.

[0029] Preferably, the lower mixture layer 8 is filled with deep aggregate 10, and the upper mixture layer 9 is filled with top aggregate 11. The deep aggregate 10 is a angular aggregate, and the top aggregate 11 is a rounded aggregate. By setting the deep aggregate 10 filled in the lower mixture layer 8, the contact area between the right-angled fragments in the deep aggregate 10 and the asphalt macadam mixture can be increased to ensure the stability after filling, and the setting of the top aggregate 11 filled in the upper mixture layer can make its exposed part a rounded part, so that the asphalt macadam mixture filled around the rounded part tends to be smooth on the top layer, ensuring the flatness of the road surface. At the same time, even if it is exposed, it will not cause damage to the vehicles passing through the top layer, solving the problem of poor effect of existing aggregate filling on the top side road surface.

[0030] Preferably, the drainage ditch 5 is connected to the internal gap of the fiber concrete layer 6. The road surface seepage finally flows into the drainage ditch 5 after passing through the fiber concrete 6, and is discharged, thereby avoiding the potential safety hazards caused by seepage or road surface water accumulation, and ensuring the stability of the road surface structure.

[0031] Preferably, the fiber concrete layer 6 is made of stainless steel fibers and cement-based materials. The fiber concrete layer 6 is made of a mixture of stainless steel fibers and cement-based materials, which can effectively overcome the disadvantages of cement such as low tensile strength and low ultimate elongation.

[0032] Preferably, the connecting layer 7 is made of glass fiber geogrid. Glass fiber geogrid makes cement have better ductility, increases the space required for cement deformation, reduces the possibility of cracks, is beneficial to improve the integrity and service life of cement concrete pavement, and significantly improves the crack resistance and durability of the entire pavement structure.

[0033] Preferably, the deep aggregate 10 is a broken block of diabase, and the top aggregate 11 is made of broken blocks of diabase after rounding.

[0034] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention, and various changes should be included in the protection scope of the present invention.

Claims

1. A composite pavement structure, characterized in that: The invention comprises a base layer (1), a construction waste recycled material layer (2), a strength reinforcement layer (3), a drainage ditch (5), a fiber concrete layer (6), a connecting layer (7) and an asphalt crushed stone mixture layer; the base layer (1), the construction waste recycled material layer (2), the strength reinforcement layer (3), the fiber concrete layer (6), the connecting layer (7) and the asphalt crushed stone mixture layer are arranged in sequence from bottom to top, the cross section of the strength reinforcement layer (3) is a structure with a high middle and low sides, and the drainage ditch (5) is arranged on the upper surface of the lowest point on both sides of the strength reinforcement layer (3).

2. A composite pavement structure according to claim 1, characterized in that: A slurry sealing layer (21) is provided between the construction waste recycled material layer (2) and the strength reinforcement layer (3).

3. A composite pavement structure according to claim 1, characterized in that: A rubber asphalt waterproof layer (4) is laid on the strength reinforcement layer (3), the rubber asphalt waterproof layer (4) is arranged in contact with the upper surface of the strength reinforcement layer (3), the drainage ditch (5) is arranged on the upper part of the rubber asphalt waterproof layer (4), and the fiber concrete layer (6) is arranged to cover the upper parts of the rubber asphalt waterproof layer (4) and the drainage ditch (5).

4. A composite pavement structure according to claim 1, characterized in that: The asphalt macadam mixture layer comprises a lower mixture layer (8) and an upper mixture layer (9), wherein the lower mixture layer (8) is arranged above the connecting layer (7), and the upper mixture layer (9) is arranged above the lower mixture layer (8).

5. A composite pavement structure according to claim 4, characterized in that: The surface of the upper mixed material layer (9) is sprayed with an organic silicon penetration layer (12).

6. A composite pavement structure according to claim 4, characterized in that: The lower mixed material layer (8) is filled with deep aggregate (10), and the upper mixed material layer (9) is filled with top aggregate (11); the deep aggregate (10) is a branched-angle aggregate, and the top aggregate (11) is a rounded-angle aggregate.

7. A composite pavement structure according to claim 3, characterized in that: The drainage ditch (5) is communicated with the internal space of the fiber concrete layer (6).

8. A composite pavement structure according to claim 1, characterized in that: The fiber concrete layer (6) is made of stainless steel fibers and cement-based material.

9. A composite pavement structure according to claim 1, characterized in that: The connecting layer (7) is made of glass fiber geogrid.

10. A composite pavement structure according to claim 6, characterized in that: The deep aggregate (10) is a broken block of diabase, and the top aggregate (11) is made of the broken block of diabase after rounding.

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