Anti-crack ultrathin overlay pavement structure

Abstract

The utility model discloses an anti-crack ultrathin overlay paving structure which comprises an original concrete layer, two non-stick wheel sticking layers, a self-sticking polyester glass fabric layer and an ultrathin overlay layer, and the two non-stick wheel sticking layers are sprayed on the top of the original concrete layer and the top of the self-sticking polyester glass fabric layer respectively. The self-adhesive polyester glass fabric layer is tightly pressed on the top of the lower non-stick wheel adhesive layer, and the ultrathin finishing coat is laid on the top of the upper non-stick wheel adhesive layer. According to the utility model, a series of structures are arranged, so that water can be conveniently guided and drained when rainwater permeates, and the phenomenon that the rainwater is directly accumulated inside to soak, damage and crack the ultrathin overlay layer is avoided; and a plurality of circular steel bars and a plurality of arc-shaped convex ribs which are fixed at the top of the original concrete layer at equal intervals can be conveniently utilized to block a plurality of sections of bulges of the ultra-thin overlay layer, so that the ground holding resistance of the ultra-thin overlay layer is enhanced, the phenomenon that the ultra-thin overlay layer is pulled, displaced and cracked due to the phenomena such as sudden braking is reduced, and the anti-cracking effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of road surface technology, specifically to a crack-resistant ultra-thin overlay paving structure. Background Technology

[0002] Given the poor driving comfort, lack of skid resistance, and high noise levels of cement concrete pavements, there has been considerable application and research in overlaying asphalt layers onto cement concrete. For the conversion of municipal highways from white to black, the overlaying of concrete bridge decks and tunnels, elevation and load-bearing issues need to be considered. Directly overlaying ultra-thin overlays onto cement concrete pavements offers significant economic advantages. However, due to the transverse and longitudinal joints in cement concrete pavements, the crack resistance of the overlayed asphalt concrete becomes an important issue. Furthermore, the requirements for interlayer treatment when overlaying thin layers on the cement concrete surface are also high to prevent delamination and slippage between layers during later service.

[0003] In response, a search revealed that announcement number CN217460137U discloses a crack-resistant ultra-thin overlay pavement structure, comprising, from top to bottom, an ultra-thin overlay layer made of asphalt, a non-stick wheel tack coat, a self-adhesive polyester fiberglass cloth layer, another non-stick wheel tack coat, and the original concrete layer. The asphalt film thickness is 12μm-20μm, and the ultra-thin overlay layer thickness is 1.5cm-2.0cm. The oil-based tack coat material can effectively penetrate the original concrete layer, enhancing adhesion and eliminating the need for milling and roughening the original pavement. The overall crack-resistant layer can also effectively seal water, improving the water resistance and durability of the upper mixture. By controlling the oil film thickness to be greater than 12μm and using a mixture prepared with high-viscosity asphalt, the ultra-thin overlay layer exhibits excellent adhesion toughness and fatigue resistance, and can also resist the development of reflective cracks to a certain extent.

[0004] The aforementioned technology discloses a crack-resistant ultra-thin overlay pavement structure that, by setting a non-stick wheel adhesive layer and a self-adhesive polyester fiberglass cloth layer, can resist the development of reflective cracks to a certain extent. However, it still has the following shortcomings in application: 1. During rainy weather, rainwater inevitably seeps into the asphalt interior of the ultra-thin overlay layer. The lack of a structure to guide the seeping water outwards poses a risk of damage and cracking of the ultra-thin overlay layer due to soaking, resulting in unsatisfactory crack resistance; 2. The grip damping force of the ultra-thin overlay layer is not ideal, and it is prone to tensile displacement and cracking during sudden braking and other phenomena. Therefore, this application proposes a crack-resistant ultra-thin overlay pavement structure to address the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a crack-resistant ultra-thin overlay paving structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a crack-resistant ultra-thin overlay paving structure, comprising an original concrete layer, two non-adhesive wheel layers, a self-adhesive polyester fiberglass cloth layer, and an ultra-thin overlay layer. The two non-adhesive wheel layers are respectively sprayed on top of the original concrete layer and the self-adhesive polyester fiberglass cloth layer. The self-adhesive polyester fiberglass cloth layer is pressed tightly onto the top of the lower non-adhesive wheel layer, and the ultra-thin overlay layer is laid on top of the upper non-adhesive wheel layer.

[0007] Multiple drainage components are installed on the existing concrete layer. Above the drainage components, there is a raised reinforcement anti-slip and cracking component on the top of the non-stick wheel adhesive layer. The drainage components are used to collect and drain rainwater after it seeps into the ultra-thin overlay layer and as it seeps down through the non-stick wheel adhesive layer and the self-adhesive polyester fiberglass cloth layer. The raised reinforcement anti-slip and cracking component is used to strengthen the grip resistance of the ultra-thin overlay layer and prevent the ultra-thin overlay layer from being pulled and cracked by sudden braking or other phenomena.

[0008] Preferably, the drainage component includes a drainage support embedded in the top of the original concrete layer, a drainage channel is provided at the bottom front side of the drainage support, and a plurality of seepage holes are provided at the top of the drainage support, each of which is connected to the corresponding drainage channel.

[0009] Preferably, the raised reinforcement anti-slip and cracking component includes a round steel bar set above the corresponding drainage support. The round steel bar is embedded in the ultra-thin cover layer and is in movable contact with the top of the non-adhesive wheel layer above. Both sides of the round steel bar are provided with arc-shaped raised ribs with flat bottoms. Multiple connecting ribs are fixedly connected to the side of the arc-shaped raised ribs near the corresponding round steel bar. The end of the connecting rib near the corresponding round steel bar is set as an upturned part and fixedly connected to the outside of the round steel bar. Both sides of the round steel bar are provided with multiple fixing nails that penetrate the self-adhesive polyester fiberglass cloth layer and are inserted into the original concrete layer. The connecting ribs are movably sleeved on the corresponding fixing nails.

[0010] Preferably, the top of the original concrete layer is provided with multiple embedding grooves with openings on both the front and back sides, and the inner wall of the embedding groove is fixedly connected to the outer side of the corresponding drainage support.

[0011] Preferably, the bottom of the drainage support is configured as an arc-shaped structure, both sides of the drainage support are configured as inclined surfaces, and the top width of the drainage support is larger than the bottom width.

[0012] Preferably, the top of the connecting rib has a circular through hole for the corresponding fixing nail to pass through.

[0013] Preferably, the drainage support is located below the middle of the two corresponding arc-shaped raised ribs.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By combining the existing concrete layer, ultra-thin overlay layer, non-stick wheel adhesive layer, self-adhesive polyester fiberglass cloth layer and drainage components, the system can guide water outward when rainwater seeps in, preventing rainwater from accumulating inside and causing soaking damage and cracking of the ultra-thin overlay layer, thus improving the crack resistance effect.

[0016] 2. By combining the existing concrete layer, the non-stick wheel adhesive layer, and the raised reinforcement anti-displacement and cracking components, multiple round steel bars and multiple arc-shaped raised bars fixed at equal intervals on the top of the existing concrete layer can block the multiple protrusions of the ultra-thin overlay layer, strengthen the grip resistance of the ultra-thin overlay layer, reduce the phenomenon of tensile displacement and cracking caused by sudden braking and other phenomena, and further improve the crack resistance effect.

[0017] This utility model incorporates a series of structures that facilitate the outward drainage of rainwater when it seeps in, preventing rainwater from accumulating inside and causing soaking damage and cracking of the ultra-thin overlay layer. Furthermore, it utilizes multiple round steel bars and multiple arc-shaped protruding ribs fixed at equal intervals to the top of the original concrete layer to block the multiple protrusions of the ultra-thin overlay layer, enhancing its grip and reducing the tensile displacement and cracking caused by sudden braking, thus improving its crack resistance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a crack-resistant ultra-thin overlay paving structure proposed in this utility model;

[0019] Figure 2 This is a cross-sectional view of a crack-resistant ultra-thin overlay paving structure proposed in this utility model;

[0020] Figure 3 for Figure 2 A magnified structural diagram of part A in the diagram.

[0021] In the diagram: 1. Ultra-thin cover layer; 2. Non-stick wheel adhesive layer; 3. Self-adhesive polyester fiberglass cloth layer; 4. Existing concrete layer; 5. Embedded groove; 6. Drainage support; 601. Drainage channel; 602. Seepage hole; 7. Round steel bar; 8. Arc-shaped raised bar; 9. Connecting bar; 901. Upward curve; 10. Fixing nail. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 3 As shown, the crack-resistant ultra-thin overlay paving structure proposed in this embodiment includes an original concrete layer 4, two non-adhesive wheel adhesive layers 2, a self-adhesive polyester fiberglass cloth layer 3, and an ultra-thin overlay layer 1. The two non-adhesive wheel adhesive layers 2 are sprayed on top of the original concrete layer 4 and the self-adhesive polyester fiberglass cloth layer 3, respectively. The self-adhesive polyester fiberglass cloth layer 3 is pressed tightly on top of the lower non-adhesive wheel adhesive layer 2, and the ultra-thin overlay layer 1 is laid on top of the upper non-adhesive wheel adhesive layer 2.

[0024] Multiple drainage components are installed on the existing concrete layer 4. Above the drainage components, there is a raised reinforcement anti-slip and crack prevention component installed on the top of the non-adhesive wheel layer 2. The drainage components are used to collect and drain rainwater after it seeps into the ultra-thin overlay layer 1 and as the rainwater seeps down through the non-adhesive wheel layer 2 and the self-adhesive polyester fiberglass cloth layer 3. The raised reinforcement anti-slip and crack prevention component is used to strengthen the grip resistance of the ultra-thin overlay layer 1 and prevent the phenomenon of tensile cracking of the ultra-thin overlay layer 1 caused by sudden braking and other phenomena.

[0025] Specifically, the drainage component includes a drainage support 6 embedded in the top of the existing concrete layer 4. The top of the existing concrete layer 4 has multiple recesses 5 with openings on both the front and back sides. The inner walls of the recesses 5 are fixedly connected to the outer sides of the corresponding drainage supports 6. The bottom of the drainage support 6 is an arc-shaped structure, and both sides of the drainage support 6 are inclined surfaces. The top width of the drainage support 6 is greater than its bottom width. A drainage channel 601 is provided at the bottom front side of the drainage support 6, and multiple recesses 601 are provided at the top of the drainage support 6, each opening to the corresponding drainage support 601. The drainage channel 601 is connected to the seepage hole 602; the drainage support 6, drainage channel 601 and seepage hole 602 are set up to cooperate so that when rainwater seeps down through the non-adhesive wheel adhesive layer 2 and the self-adhesive polyester fiberglass cloth layer 3, the rainwater seeps into the drainage channel 601 through multiple seepage holes 602. One end of the drainage channel 601 is connected to the external drainage channel. The water is guided to the drainage channel 601 for discharge, avoiding the phenomenon of rainwater directly accumulating inside and causing soaking damage and cracking to the ultra-thin cover layer 1, thus improving the crack resistance effect.

[0026] Furthermore, the raised reinforcement anti-slip and cracking component includes a round steel bar 7 set above the corresponding drainage support 6. The round steel bar 7 is pre-embedded in the ultra-thin cover layer 1 and makes movable contact with the top of the non-adhesive wheel layer 2 above. Both sides of the round steel bar 7 are provided with arc-shaped raised ribs 8 with flat bottoms. The drainage support 6 is located in the middle and lower part of the two corresponding arc-shaped raised ribs 8. Multiple connecting ribs 9 are fixedly connected to the side of the arc-shaped raised rib 8 near the corresponding round steel bar 7. The end of the connecting rib 9 near the corresponding round steel bar 7 is set as an upward-curved part 901 and fixedly connected to the outside of the round steel bar 7. Both sides of the round steel bar 7 are provided with multiple fixing nails 10 that penetrate the self-adhesive polyester fiberglass cloth layer 3 and are inserted into the original concrete layer 4. The reinforcing bar 9 is movably fitted onto the corresponding fixing nail 10. The top of the connecting reinforcing bar 9 has a round through hole for the corresponding fixing nail 10 to pass through. The round reinforcing bar 7, the arc-shaped protruding reinforcing bar 8, the connecting reinforcing bar 9 and the fixing nail 10 work together to fix the round reinforcing bar 7 and the arc-shaped protruding reinforcing bar 8 to the top of the original concrete layer 4 using multiple fixing nails 10 and multiple connecting reinforcing bars 9. After the ultra-thin overlay layer 1 is laid and solidified, the multiple round reinforcing bars 7 and multiple arc-shaped protruding reinforcing bars 8 form a multi-segment protrusion blocking effect, which strengthens the grip resistance of the ultra-thin overlay layer 1 and reduces the phenomenon of tensile displacement cracking caused by sudden braking and other phenomena, further improving the crack resistance effect.

[0027] The method of use in this embodiment is as follows: Multiple recessed grooves 5 with openings on both the front and back sides are pre-drilled on the top of the existing concrete layer 4, and the drainage support 6 is fixed in the corresponding recessed grooves 5. A layer of non-stick wheel adhesive 2 is sprayed onto the existing concrete layer 4. A self-adhesive polyester fiberglass cloth layer 3 is laid on top of the non-stick wheel adhesive layer 2. After laying, it is rolled with a roller. Another layer of non-stick wheel adhesive 2 is sprayed on top of the self-adhesive polyester fiberglass cloth layer 3. Then, multiple sets of round steel bars 7 and arc-shaped protruding bars 8 are placed on top of it, and the bottom end of the fixing nail 10 is inserted into the corresponding connecting bar 9. Inside the circular perforation, the top of the fixing nail 10 is hammered downwards using an external hammering tool, so that its bottom end penetrates the self-adhesive polyester fiberglass cloth layer 3 and drills into the original concrete layer 4, thereby fixing the connecting bar 9, and then fixing the round bar 7 and the arc-shaped protruding bar 8. After the ultra-thin cover layer 1 is laid and solidified, the multiple round bars 7 and multiple arc-shaped protruding bars 8 form a multi-segment protrusion blocking effect, which strengthens the grip resistance of the ultra-thin cover layer 1, reduces the phenomenon of tensile displacement cracking caused by sudden braking and other phenomena, and improves the crack resistance effect.

[0028] One end of the drainage channel is connected to the external drainage channel. When rainwater seeps into the ultra-thin cover layer 1 during rainy days, it then seeps into the non-stick wheel adhesive layer 2 and the self-adhesive polyester fiberglass cloth layer 3. The rainwater then seeps into the drainage channel 601 through multiple seepage holes 602. The water is then guided to the drainage channel 601 for discharge. This achieves the effect of guiding the water outward when it seeps in, avoiding the phenomenon of rainwater directly accumulating inside and causing soaking damage and cracking of the ultra-thin cover layer 1, and further improving the crack resistance effect.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A crack-resistant ultra-thin overlay paving structure, comprising an original concrete layer (4), two non-adhesive wheel-adhesive layers (2), a self-adhesive polyester fiberglass cloth layer (3), and an ultra-thin overlay layer (1), characterized in that: The two layers of non-stick wheel adhesive layer (2) are sprayed on the top of the original concrete layer (4) and the self-adhesive polyester fiberglass cloth layer (3), respectively. The self-adhesive polyester fiberglass cloth layer (3) is pressed on the top of the lower non-stick wheel adhesive layer (2), and the ultra-thin cover layer (1) is laid on the top of the upper non-stick wheel adhesive layer (2). Multiple drainage components are provided on the original concrete layer (4), and a raised reinforcement anti-movement and anti-cracking component is provided on the top of the non-stick wheel adhesive layer (2) above the drainage components.

2. The crack-resistant ultra-thin overlay paving structure according to claim 1, characterized in that: The drainage component includes a drainage support (6) embedded in the top of the original concrete layer (4), a drainage channel (601) is provided at the bottom front side of the drainage support (6), and a plurality of seepage holes (602) are provided at the top of the drainage support (6), each of which is connected to the corresponding drainage channel (601).

3. The crack-resistant ultra-thin overlay paving structure according to claim 2, characterized in that: The raised reinforcement anti-movement and cracking component includes a round steel bar (7) set above the corresponding drainage support (6). The round steel bar (7) is embedded in the ultra-thin cover layer (1) and is in contact with the top of the non-adhesive wheel layer (2) above. Both sides of the round steel bar (7) are provided with arc-shaped raised ribs (8) with flat bottoms. Multiple connecting ribs (9) are fixedly connected to the side of the arc-shaped raised rib (8) close to the corresponding round steel bar (7). The end of the connecting rib (9) close to the corresponding round steel bar (7) is set as an upturned part (901) and fixedly connected to the outside of the round steel bar (7). Both sides of the round steel bar (7) are provided with multiple fixing nails (10) that penetrate the self-adhesive polyester fiberglass cloth layer (3) and are inserted into the original concrete layer (4). The connecting ribs (9) are movably sleeved on the corresponding fixing nails (10).

4. The crack-resistant ultra-thin overlay paving structure according to claim 2, characterized in that: The top of the original concrete layer (4) is provided with multiple embedding grooves (5) with openings on both the front and back sides. The inner wall of the embedding groove (5) is fixedly connected to the outer side of the corresponding drainage support (6).

5. The crack-resistant ultra-thin overlay paving structure according to claim 2, characterized in that: The bottom of the drainage support (6) is set as an arc-shaped structure, and both sides of the drainage support (6) are set as inclined surfaces. The top width of the drainage support (6) is larger than the bottom width.

6. The crack-resistant ultra-thin overlay paving structure according to claim 3, characterized in that: The top of the connecting rib (9) is provided with a round through hole for the corresponding fixing nail (10) to pass through.

7. The crack-resistant ultra-thin overlay paving structure according to claim 3, characterized in that: The drainage support (6) is located in the middle and lower part of the two corresponding arc-shaped raised ribs (8).

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