Prefabricated asphalt pavement joint structure

Abstract

The utility model belongs to the technical field of road construction, and particularly relates to a prefabricated asphalt pavement joint structure which comprises a grating net and a force transmission cover, the grating net is laid on a roadbed layer with cracks, the force transmission cover comprises a cover plate, a partition plate and frame feet, the partition plate is arranged at the bottom of the cover plate, and the frame feet are oppositely arranged on the two sides of the bottom of the partition plate. Wherein the frame feet are used for abutting against the top of the grating net, and a second pouring layer is formed between the bottom of the partition plate and the top of the grating net. The utility model aims to provide rigid support for a newly paved asphalt pavement effectively by arranging the force transmission cover. The force transmission cover is used for bearing impact force generated in the running process of a vehicle, so that the bearing capacity of a newly paved asphalt pavement facing impact load is improved, the service life of the pavement is prolonged, the economic burden caused by frequent maintenance can be reduced, and the smoothness of the road and the running safety are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of road construction, and in particular relates to a prefabricated asphalt pavement joint structure. Background Art

[0002] As one of the main forms of road structures in China, cement concrete pavement is known for its high stiffness, good stability, excellent durability and low maintenance costs. However, over time, cement concrete pavements will inevitably develop various defects and eventually need to be repaired by laying a new asphalt concrete surface layer or rebuilding a new cement concrete pavement. When an asphalt concrete surface layer is laid on an old cement concrete pavement (commonly known as "white to black"), reflective cracks are a common problem. This is mainly because the cracks in the original cement pavement, including longitudinal and transverse joints, construction joints and through cracks, become stress concentration points under the action of loads. Under the continuous influence of traffic loads and ambient temperature changes, these cracks will expand and extend into the asphalt concrete surface layer, eventually leading to through-going reflective cracks in the asphalt surface layer. Once the asphalt pavement cracks, it will directly lead to pavement damage under the erosion of media such as rainwater.

[0003] In existing technology, commonly used measures to prevent reflective cracks in asphalt pavements primarily include direct overlay. This method first involves laying a fiberglass grid on the old cement concrete pavement. The fiberglass grid enhances the base material's resistance to cracking. Subsequently, asphalt is laid. However, as a flexible connecting material, while fiberglass grid can somewhat resist thermal cracking caused by thermal expansion and contraction of concrete, its effectiveness is limited when subjected to impact shear forces such as vehicle wheel loads, potentially causing cracks to reflect onto the asphalt pavement. Utility Model Content

[0004] In view of this, the utility model provides a prefabricated asphalt pavement joint structure, the purpose of which is to add a structure between the asphalt layer and the old pavement that can withstand impact loads and effectively transfer stress, helping to ensure that the asphalt pavement is not damaged by the generation of reflective cracks.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A prefabricated asphalt pavement joint structure, comprising a grid mesh and a force transmission cover, wherein the grid mesh is laid on a cracked roadbed, and the force transmission cover comprises a cover plate, a partition plate, and legs, wherein the partition plate is arranged at the bottom of the cover plate, and the legs are arranged on both sides of the bottom of the partition plate;

[0007] The legs are used to contact the top of the grille, a second perfusion layer is formed between the bottom of the partition and the top of the grille, and a first perfusion layer is formed between the top of the partition and the bottom of the cover plate, and both the first perfusion layer and the second perfusion layer are used to fill asphalt slurry;

[0008] A pouring port for pouring asphalt slurry is provided on the top of the cover plate.

[0009] As a preferred technical solution, the cover plate is arranged in an isosceles trapezoidal structure.

[0010] Furthermore, first guide grooves for the asphalt slurry in the first injection layer to flow are provided on the surfaces of both sides of the cover plate.

[0011] Furthermore, the legs are columns with a rectangular structure, and the length of the legs is adapted to the length of the partition.

[0012] Furthermore, a second guide groove is provided along the length direction of the frame leg for the asphalt slurry in the second grouting layer to flow.

[0013] Furthermore, a plurality of slots are provided on the partition plate, and positioning pins are provided in the slots. The positioning pins are used to pass through the grille mesh and connect with the road base layer.

[0014] Furthermore, the positioning pin can be movably inserted into the card slot.

[0015] Furthermore, a plurality of the card slots are distributed in an array along the length direction of the partition.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] The installation of a force transfer shield effectively provides rigid support for newly paved asphalt pavement. The shield's function is to absorb the impact forces generated by vehicles traveling on the road, thereby improving the newly paved asphalt pavement's bearing capacity in the face of impact loads. This helps extend the pavement's service life, reduces the financial burden of frequent maintenance, and ensures road smoothness and driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0019] Figure 1 This is a structural schematic diagram of a prefabricated asphalt pavement joint structure provided by the utility model;

[0020] Figure 2 The utility model provides Figure 1 A magnified schematic diagram of point A in the middle;

[0021] Figure 3This is a structural diagram of the cover plate provided by the utility model;

[0022] Figure 4 It is a structural schematic diagram of the grille net provided by the utility model.

[0023] Road base layer-1; grid mesh-2; cover plate-3; first pouring layer-4; partition-5; frame foot-6; second pouring layer-7; positioning pin-8; pouring port-9; first guide groove-10; second guide groove-11; card slot-12. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. 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.

[0025] Example 1

[0026] In existing technology, commonly used measures to prevent reflective cracks in asphalt pavements primarily include direct overlay. This method first involves laying a fiberglass grid on the old cement concrete pavement. The fiberglass grid enhances the base material's resistance to cracking. Subsequently, asphalt is laid. However, as a flexible connecting material, while fiberglass grid can somewhat resist thermal cracking caused by thermal expansion and contraction of concrete, its effectiveness is limited when subjected to impact shear forces such as vehicle wheel loads, potentially causing cracks to reflect onto the asphalt pavement.

[0027] Therefore, in order to solve the above problems and realize the function that the newly paved asphalt pavement can withstand the impact load and is not easily affected by the reflection of cracks, the utility model discloses a prefabricated asphalt pavement joint structure. Figure 1 and Figure 2 , including a grille mesh 2 and a force transmission cover, the grille mesh 2 is laid on a road base 1 with cracks, the force transmission cover includes a cover plate 3, a partition 5 and a leg 6, the partition 5 is arranged at the bottom of the cover plate 3, and the leg 6 is arranged on both sides of the bottom of the partition 5, wherein the leg 6 is used to contact the top of the grille mesh 2, and a second perfusion layer 7 is formed between the bottom of the partition 5 and the top of the grille mesh 2, and a first perfusion layer 4 is formed between the top of the partition 5 and the bottom of the cover plate 3, the first perfusion layer 4 and the second perfusion layer 7 are both used to fill asphalt slurry, and the top of the cover plate 3 is provided with a perfusion port 9 for perfusing asphalt slurry.

[0028] In this embodiment, the grid mesh 2 is made of fiberglass, which has excellent tensile strength and flexibility, effectively dissipating and absorbing the impact force caused by vehicle wheel loads. The grid mesh 2 is laid in a staggered pattern both horizontally and vertically, ensuring high load-bearing capacity in all directions. The dimensions of the grid mesh 2 are customized based on the distribution and width of actual road cracks to ensure complete coverage.

[0029] The entire force transmission cover is made of stainless steel, which has good corrosion resistance and wear resistance. Among them, the cover plate 3 is designed in a rectangular shape, and its length and width are adjusted according to the actual road surface size. Through the setting of the force transmission cover, it can provide rigid support for the newly paved asphalt road surface.

[0030] For example, the grid mesh 2 is first laid on the cracked roadbed 1. The force transmission shield's legs 6 are then aligned with the top of the grid mesh 2 to ensure its stability. Next, asphalt slurry is poured through the pouring port 9 into the first and second pouring layers 4, 7 until overflowing, ensuring the density and uniformity of the pouring layers. Finally, after the asphalt slurry cools and solidifies, the force transmission shield is integrated with the asphalt pavement, allowing it to withstand vehicle impacts and thus improve the asphalt pavement's impact load capacity.

[0031] It is understandable that when the first pouring layer 4 and the second pouring layer 7 are filled with asphalt slurry, the asphalt slurry will overflow from the pouring port 9 until the asphalt slurry completely covers the cover plate 3.

[0032] Furthermore, the partition 5 is used to separate the first pouring layer 4 and the second pouring layer 7. When the cracks on the roadbed 1 begin to reflect, the reflected stress will first act on the asphalt in the second pouring layer 7. At this time, due to the presence of the partition 5, the stress can be prevented from being directly transmitted to the first pouring layer 4, in the hope of avoiding further expansion of the cracks.

[0033] In one embodiment, the cover plate 3 is arranged in an isosceles trapezoidal structure. The isosceles trapezoidal structure of the cover plate 3 enables it to better adapt to stress changes in different directions after being combined with the asphalt pavement, and can more effectively disperse the pressure when bearing vehicle loads, thereby extending the service life of the pavement.

[0034] In one embodiment, the leg 6 is a column with a rectangular structure, and the length of the leg 6 is adapted to the length of the partition 5, so that the leg 6 can provide stable support for the force transmission cover.

[0035] Example 2

[0036] On the basis of Example 1, in order to improve the efficiency of asphalt injection, refer to Figure 3The present invention further includes a first guide groove 10 and a second guide groove 11 for accelerating the circulation of asphalt. Specifically, the surfaces of both sides of the cover plate 3 are provided with first guide grooves 10 for the circulation of asphalt slurry in the first perfusion layer 4, and the length direction of the frame foot 6 is provided with second guide grooves 11 for the circulation of asphalt slurry in the second perfusion layer 7.

[0037] In this embodiment, when the user pours asphalt slurry through the filling port 9, the asphalt slurry will first enter the first filling layer 4, and then the asphalt slurry in the first filling layer 4 will flow out along the first guide grooves 10 on both sides of the cover plate 3, and the outflowing asphalt slurry will flow into the second guide grooves 11 along both sides of the cover plate 3 until the entire second filling layer 7 is filled.

[0038] It is understandable that, since the second pouring layer 7 is located above the road base layer 1 , the asphalt slurry in the second pouring layer 7 will be directly poured into the cracks of the road base layer 1 , playing a role of sealing and filling.

[0039] In one embodiment, the user can array several force transfer hoods on the road base layer 1. Then, during the pouring process, the asphalt slurry can flow between the force transfer hoods through the first guide groove 10 and the second guide groove 11. Therefore, when the asphalt slurry solidifies, an integral asphalt pouring layer will be formed between the force transfer hoods, thereby improving the overall strength and stability of the road surface.

[0040] In addition, due to the provision of the first guide groove 10 and the second guide groove 11, the pouring process of the asphalt slurry is smoother, bubbles and voids during the pouring process are reduced, and the quality of the pouring layer is ensured.

[0041] Example 3

[0042] On the basis of the first embodiment, in order to improve the stability of the force transmission cover on the roadbed 1, refer to Figure 3 and Figure 4 The partition plate 5 is provided with a plurality of slots 12 , and the slots 12 are provided with positioning nails 8 , and the positioning nails 8 are used to pass through the grid mesh 2 and connect with the road base 1 .

[0043] In this embodiment, the positioning nails 8 pass through the grid on the grille mesh 2 to access the roadbed layer 1 or the cracks in the roadbed layer 1, so as to improve the stability of the force transmission cover on the roadbed layer 1. At the same time, it can also fix the grille mesh 2, making it less likely to move during use, thereby enhancing the tightness between the grille mesh 2 and the roadbed layer 1.

[0044] It's worth noting that several slots 12 are arranged in an array along the length of the partition 5, and the positioning pins 8 are removably inserted into the slots 12. This arrangement allows for flexibility during installation. When the force transmission shield needs to be secured to the roadbed 1, the position of the positioning pins 8 within the slots 12 can be adjusted based on the actual crack location and depth, ensuring that the positioning pins 8 are effectively inserted into the cracks in the roadbed 1. This design not only improves the installation efficiency of the force transmission shield but also adapts to the actual needs of different road conditions.

[0045] Furthermore, to further enhance the bonding between the force transmission shield and the roadbed 1, the distal end of the positioning pin 8 can be designed with an expansion structure, such as a barb or expansion head. Once the positioning pin 8 is inserted into the roadbed 1, the expansion structure at the distal end generates greater friction and engagement with the material of the roadbed 1, effectively preventing the positioning pin 8 from loosening or falling off during use.

[0046] In summary, in combination with Examples 1 to 3, the working steps of the prefabricated asphalt pavement joint structure are as follows:

[0047] First, the grid mesh 2 is laid on the roadbed 1 with cracks, and then the prefabricated force transmission cover is placed on the grid mesh 2.

[0048] Subsequently, the positioning pins 8 of the force transmission cover are inserted into the cracks of the roadbed 1. Since the position of the positioning pins 8 in the slots 12 can be flexibly adjusted, they can be accurately installed according to the specific position and depth of the cracks.

[0049] Finally, asphalt slurry is poured through the pouring port 9. It first flows into the first pouring layer 4 and then, guided by the first and second guide grooves 10 and 11, evenly fills the second pouring layer 7. During the pouring process, the design of the guide grooves ensures smoother flow of the asphalt slurry, reducing the formation of bubbles and voids and ensuring the density and uniformity of the pouring layer. After the asphalt slurry cools and solidifies, the force transmission cover and the asphalt pavement become one. At this point, the cover plate 3 can withstand vehicle impact, thereby improving the impact load capacity of the asphalt pavement.

[0050] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0051] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A prefabricated asphalt pavement joint structure, characterized in that: The invention comprises a grid mesh (2) and a force transmission cover, wherein the grid mesh (2) is laid on a roadbed (1) with cracks, and the force transmission cover comprises a cover plate (3), a partition plate (5) and a support leg (6), wherein the partition plate (5) is arranged at the bottom of the cover plate (3), and the support leg (6) is arranged on both sides of the bottom of the partition plate (5); wherein the legs (6) are used to contact the top of the grille (2); a second perfusion layer (7) is formed between the bottom of the partition (5) and the top of the grille (2); a first perfusion layer (4) is formed between the top of the partition (5) and the bottom of the cover plate (3); and both the first perfusion layer (4) and the second perfusion layer (7) are used to fill asphalt slurry; The top of the cover plate (3) is provided with a pouring port (9) for pouring asphalt slurry.

2. The prefabricated asphalt pavement joint structure according to claim 1, characterized in that: The cover plate (3) is arranged in an isosceles trapezoidal structure.

3. The prefabricated asphalt pavement joint structure according to claim 2, characterized in that: The surfaces of both sides of the cover plate (3) are provided with first guide grooves (10) for the asphalt slurry in the first perfusion layer (4) to flow.

4. The prefabricated asphalt pavement joint structure according to claim 1, characterized in that: The support leg (6) is a column with a rectangular structure, and the length of the support leg (6) is adapted to the length of the partition (5).

5. The prefabricated asphalt pavement joint structure according to claim 4, characterized in that: A second guide groove (11) is provided in the length direction of the support leg (6) for the asphalt slurry in the second grouting layer (7) to flow.

6. The prefabricated asphalt pavement joint structure according to claim 1, characterized in that: The partition (5) is provided with a plurality of slots (12), and positioning pins (8) are provided in the slots (12). The positioning pins (8) are used to pass through the grid mesh (2) and connect with the road base (1).

7. The prefabricated asphalt pavement joint structure according to claim 6, characterized in that: The positioning pin (8) is movably inserted into the card slot (12).

8. The prefabricated asphalt pavement joint structure according to claim 6, characterized in that: The plurality of slots (12) are distributed in an array along the length direction of the partition (5).

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