Pavement lap joint structure

Abstract

The utility model relates to a road surface lap joint structure, and belongs to the field of road surface lap joint, the road surface lap joint structure comprises an old road surface, a connecting assembly is arranged on the outer side of the old road surface, and a reinforcing assembly is arranged on the upper surface of the connecting assembly. According to the road surface lap joint structure, under the combined use of the connecting assemblies and the reinforcing assemblies, the connecting assemblies are additionally arranged on the outer side of an old road surface and comprise the embedded blocks, the anchor bolts and the attaching plates, a stable base is provided through the combination of the assemblies, and the connecting assemblies are tightly combined with the old road surface through the anchor bolts; the connecting strength between the new pavement and the old pavement is remarkably improved, the anchoring effect of the anchoring bolt and the old pavement is further enhanced through the chemical anchoring agent, it is guaranteed that the pavement lap joint area can be kept stable even under the pressure of heavy traffic, and the risks of cracking and damage caused by infirm connection are reduced; the attaching plate provides a platform for uniformly distributing force for the reinforcing assembly, so that the whole structure is more balanced and firmer.

Description

Technical Field

[0001] The present application relates to the technical field of pavement overlap, and in particular to a pavement overlap structure. Background Art

[0002] With the increase of highway traffic volume, when the highway traffic volume is oversaturated, serious congestion will occur. In order to solve this problem, two approaches are usually adopted. One is to build a new road, and the other is to widen and renovate the original road. Since the investment in new roads is huge and the economic benefits have yet to be tested, the current approach is to widen the highway road surface. In the construction process of widening the highway road surface, specifically when widening the asphalt road surface, it is necessary to overlap the new and old asphalt road surfaces. When overlapping the asphalt road surface, the road surface is usually milled first, and a certain width is planed to form a clearly layered fault, and the corresponding new road structure is overlapped at the corresponding fault.

[0003] For example, an asphalt pavement overlap structure disclosed in Chinese patent publication number (CN 218147603 U) includes an old pavement base layer and a new pavement base layer, wherein the new pavement base layer is provided on one side of the old pavement base layer and the two are connected together, an old pavement cushion layer is overlapped on the top of the old pavement base layer, and an old pavement surface layer is overlapped on the top of the old pavement cushion layer. The beneficial effect is that: the utility model is provided with a reinforcing connection component between the connecting position of the old pavement base layer and the new pavement base layer, and a reinforcing connection component is also added at the connecting position of the old pavement cushion layer, so as to enhance the connection strength of the old pavement base layer and the new pavement base layer by setting the reinforcing connection component, and enhance the connection strength of the old pavement cushion layer and the new pavement cushion layer when they are connected, so as to prevent the road connecting position from loosening and cracking due to the pressure of transportation.

[0004] However, the prior art, such as the above-mentioned patent, still has the problem of poor crack resistance for pavement overlap. In order to improve the connection strength, the prior art adopts the method of strengthening the connection component to enhance the connection strength between the old pavement base and the new pavement base. Specifically, the strengthening connection component is to set fastening bolts on the old and new pavements to connect them. In this method, the fastening bolts need to be driven into the old and new pavements. The overlap of asphalt pavement is generally performed by pouring asphalt on the milled pavement. In the prior art, driving fastening bolts will cause secondary damage to the pavement, reduce the strength during casting and molding, and thus reduce the crack resistance of the pavement overlap. Utility Model Content

[0005] In response to the deficiencies of the prior art, the present application provides a pavement overlap structure having advantages such as high pavement overlap crack resistance, thereby solving the problem of poor crack resistance of pavement overlap.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a pavement overlap structure, comprising an old pavement, a connecting assembly provided on the outer side of the old pavement, and a reinforcing assembly provided on the upper surface of the connecting assembly;

[0007] The connecting assembly includes an embedded block, an anchor bolt and a bonding plate. The outer side of the old pavement is provided with a lap groove, the upper surface of the lap groove is provided with an embedded groove, the embedded block is inserted into the inner part of the embedded groove, and a fixing screw hole is provided between the embedded block and the side opposite to the embedded groove. The anchor bolt is threadedly connected to the inner wall of the fixing screw hole, and the bonding plate is fixed to the upper surface of the embedded block;

[0008] The reinforcement assembly includes several vertical bars, several stirrups and new pavement. Several of the vertical bars are vertically fixed on the upper surface of the plywood, and several of the stirrups are sleeved on the outside of the several vertical bars. The new pavement is cast above the lap groove and located on the outside of the several vertical bars and several stirrups.

[0009] By adopting this technical solution, by setting connection components and reinforcement components on the outside of the old pavement, the stability and structural strength of the pavement joint are improved. The coordinated use of embedded blocks, anchor bolts and bonding plates ensures a firm connection between the new and old pavements, reducing damage caused by uneven pavement settlement or traffic loads.

[0010] Furthermore, the upper surface of the embedding block and the upper surface of the overlapping groove are located in the same horizontal plane, and the length of the embedding block is equal to the distance between the front and rear inner walls of the embedding groove.

[0011] This technical solution ensures that the upper surface of the mounting block and the upper surface of the lap groove are on the same horizontal plane, ensuring a smooth connection between the connection assembly and the existing pavement and avoiding stress concentration caused by height differences. The length of the mounting block is equal to the distance from the inner wall of the mounting groove, ensuring stability and uniform stress distribution.

[0012] Furthermore, a hidden groove corresponding to the position of the fixing screw hole is provided on the upper surface of the embedded block, and the head of the anchor bolt is located inside the hidden groove.

[0013] By adopting this technical solution, the hidden groove design not only provides a hidden space for the anchor bolt and protects the bolt head from damage, but also enhances the aesthetics of the overall structure. The anchor bolt head is hidden in the groove, reducing potential damage to it caused by external factors.

[0014] Furthermore, the interior of the fixing screw hole and the outside of the anchor bolt are filled with a chemical anchoring agent, and the chemical anchoring agent is a mixed reagent of sodium silicate and sulfuric acid.

[0015] By adopting this technical solution, the use of chemical anchoring agents, specifically a mixture of sodium silicate and sulfuric acid, provides a mechanism for rapid curing and expansion, enhancing the anchoring force between the anchor bolts and the old pavement, and improving the reliability and durability of the connection.

[0016] Furthermore, the overlapping groove is a stepped groove, and the upper surface of the bonding plate is provided with a connection hole for inserting the anchor bolt.

[0017] By adopting this technical solution, the design of the stepped groove adapts to pavement layers of different thicknesses, ensures close contact between the bonding plate and the pavement, improves the stability of the connection, and the setting of the connection holes facilitates the insertion and fixation of the anchor bolts, simplifying the construction process.

[0018] Furthermore, the upper surface of the new road surface and the upper surface of the old road surface are located at the same horizontal plane.

[0019] By adopting this technical solution, the upper surfaces of the new and old roads are at the same level, ensuring the flatness of the road surface and driving comfort, and reducing vehicle bumps and potential damage caused by uneven road surfaces.

[0020] Furthermore, the plurality of vertical ribs are evenly distributed along the length direction of the laminated board.

[0021] By adopting this technical solution, the vertical reinforcement is evenly distributed along the length of the laminate, providing uniform support force, avoiding structural damage caused by local stress concentration, and improving the stability and bearing capacity of the overall structure.

[0022] Furthermore, the stirrups are rectangular in shape, and the thickness of the stirrups is equal to the diameter of the vertical bars.

[0023] By adopting this technical solution, the rectangular shape of the stirrups and the thickness equal to the diameter of the vertical bars ensure a close fit between the stirrups and the vertical bars, improve the restraining effect of the stirrups, and enhance the crack resistance and durability of the overall structure.

[0024] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0025] 1. The pavement overlap structure, through the combined use of connection components and reinforcement components, adds connection components on the outside of the old pavement, including embedded blocks, anchor bolts and bonding plates. The combination of these components not only provides a stable base, but also significantly improves the connection strength between the new and old pavements through the close connection between the anchor bolts and the old pavement. The application of chemical anchoring agents further enhances the anchoring effect of the anchor bolts and the old pavement, ensuring that the pavement overlap area can remain stable even under the pressure of heavy traffic, reducing the risk of cracking and damage caused by weak connections. In addition, the setting of the bonding plate provides a platform for evenly distributing force for the reinforcement components, making the entire structure more balanced and firm.

[0026] 2. The pavement overlap structure and reinforcement components enhance the overall stability and durability of the pavement. The combination of vertical bars and stirrups forms a three-dimensional reinforcement frame, which not only improves the crack resistance of the overlap area of the new and old pavements, but also effectively prevents damage caused by local stress concentration by evenly distributing force. The new pavement is poured on the outside of the vertical bars and stirrups, forming a seamless whole with the old pavement, ensuring the flatness and consistency of the pavement. This design also takes into account the convenience and economy of construction, avoids secondary damage to the old pavement, reduces interference with traffic during construction, and also reduces maintenance costs, thereby improving the service life and economic benefits of the road. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of this application;

[0028] Figure 2 Schematic diagram of connecting components for this application;

[0029] Figure 3 Enhance the component diagram for this application;

[0030] Figure 4 This is a partial schematic diagram of the reinforcement components of this application.

[0031] In the figure: 1. Old pavement; 2. Connection assembly; 21. Embedded block; 22. Anchor bolt; 23. Bonding plate; 24. Overlap groove; 25. Embedded groove; 26. Fixing screw hole; 3. Reinforcement assembly; 31. Vertical reinforcement; 32. Stirrups; 33. New pavement. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] See also Figure 1 A pavement overlap structure in this embodiment includes an old pavement 1, a connecting component 2 is provided on the outside of the old pavement 1, and a reinforcing component 3 is provided on the upper surface of the connecting component 2. By arranging the connecting component 2 and the reinforcing component 3 on the outside of the old pavement 1, the stability and structural strength of the pavement overlap are improved. The coordinated use of the embedded block 21, the anchor bolt 22 and the bonding plate 23 ensures a firm connection between the new and old pavements, and reduces damage caused by uneven pavement settlement or traffic load.

[0034] See also Figure 2 In order to facilitate the connection between the new and old pavements, the connection assembly 2 in this embodiment includes an embedded block 21, an anchor bolt 22 and a bonding plate 23. A lap groove 24 is provided on the outside of the old pavement 1 to provide space for the installation of the connection assembly 2. An embedded groove 25 is provided on the upper surface of the lap groove 24. The embedded block 21 is inserted into the embedded groove 25. An embedded groove 25 is provided on the upper surface of the lap groove 24 for inserting the embedded block 21. Inserted into the inside of the embedding groove 25, ensure that the embedding block 21 is fixed to the old pavement 1, and a fixing screw hole 26 is opened between the embedding block 21 and the opposite side of the embedding groove 25. The anchor bolt 22 is threadedly connected to the inner wall of the fixing screw hole 26. The anchor bolt 22 is threadedly connected to the inner wall of the embedding block 21 through the fixing screw hole 26 to fix the embedding block 21. The bonding plate 23 is fixed on the upper surface of the embedding block 21. The bonding plate 23 is fixed on the upper surface of the embedding block 21 as the basis for connecting the new and old pavements.

[0035] In this embodiment, the upper surface of the embedded block 21 and the upper surface of the overlapping groove 24 are located in the same horizontal plane, the length of the embedded block 21 is equal to the distance between the front and rear inner walls of the embedded groove 25, and a hidden groove corresponding to the position of the fixing screw hole 26 is opened on the upper surface of the embedded block 21, and the head of the anchor bolt 22 is located inside the hidden groove. The design of the stepped groove adapts to pavement layers of different thicknesses, ensures close contact between the bonding plate 23 and the pavement, and improves the stability of the connection. The setting of the connecting hole facilitates the insertion and fixation of the anchor bolt 22 and simplifies the construction process. The interior of the fixing screw hole 26 and the outside of the anchor bolt 22 are filled with a chemical anchor, and the chemical anchor is a mixture of sodium silicate and sulfuric acid. The chemical anchor is filled inside the fixing screw hole 26 to enhance the connection strength between the anchor bolt 22 and the old pavement. The overlapping groove 24 is a stepped groove, and the upper surface of the bonding plate 23 is provided with a connecting hole for inserting the anchor bolt 22.

[0036] It should be noted that the combination of the embedded block 21, the anchor bolt 22 and the bonding plate 23 not only provides a stable base, but also significantly improves the connection strength between the new and old pavements through the close combination of the anchor bolt 22 and the old pavement 1. The application of chemical anchoring agent further enhances the anchoring effect of the anchor bolt 22 and the old pavement 1, ensuring that the pavement overlap area can remain stable even under the pressure of heavy traffic, reducing the risk of cracking and damage caused by loose connection. In addition, the setting of the bonding plate 23 provides a platform for evenly distributing force for the reinforcement component 3, making the entire structure more balanced and firm.

[0037] See also Figures 3 and 4 In order to improve the crack resistance of the pavement after overlapping, the reinforcement component 3 in this embodiment includes several vertical bars 31, several stirrups 32 and new pavement 33. Several vertical bars 31 are vertically fixed on the upper surface of the bonding plate 23. Several vertical bars 31 are vertically fixed on the upper surface of the bonding plate 23 to provide vertical support. Several stirrups 32 are sleeved on the outside of several vertical bars 31. The stirrups 32 are sleeved on the outside of the vertical bars 31 to form a closed structure to provide lateral restraint. The new pavement 33 is cast above the overlapping groove 24 and is located on the outside of the several vertical bars 31 and several stirrups 32. The new pavement 33 is cast above the overlapping groove 24 to ensure that the new pavement 33 is located on the outside of the vertical bars 31 and stirrups 32 to form an integral structure.

[0038] In this embodiment, the upper surface of the new pavement 33 and the upper surface of the old pavement 1 are located at the same horizontal plane, and several vertical ribs 31 are evenly distributed along the length direction of the bonding plate 23. The upper surface of the new pavement 33 and the upper surface of the old pavement 1 should be adjusted to the same horizontal plane to ensure that the pavement is flat. The vertical ribs 31 are evenly distributed along the length direction of the bonding plate 23 to provide uniform support. The stirrups 32 are rectangular in shape, and the thickness of the stirrups 32 is equal to the diameter of the vertical ribs 31. The size of the stirrups 32 matches the vertical ribs 31 to ensure the stability of the overall structure, achieve a firm connection between the new and old pavements, and improve the stability and bearing capacity of the pavement overlap.

[0039] It should be noted that the reinforcement component 3 enhances the overall stability and durability of the road surface. The combined use of the vertical bars 31 and the stirrups 32 forms a three-dimensional reinforcement frame, which not only improves the crack resistance of the overlap area between the new and old road surfaces, but also effectively prevents damage caused by local stress concentration by evenly distributing force. The new road surface 33 is cast on the outside of the vertical bars 31 and stirrups 32, forming a seamless whole with the old road surface 1, ensuring the flatness and consistency of the road surface. This design also takes into account the convenience and economy of construction, avoids secondary damage to the old road surface, and reduces interference with traffic during construction.

[0040] The working principle of the above embodiment is:

[0041] (1) A lap groove 24 is provided on the outer side of the old pavement 1 to provide space for the installation of the connection assembly 2. An embedding groove 25 is provided on the upper surface of the lap groove 24 for inserting the embedding block 21. The embedding block 21 is inserted into the embedding groove 25 to ensure that the embedding block 21 is fixed to the old pavement 1. The anchor bolt 22 is threadedly connected to the inner wall of the embedding block 21 through the fixing screw hole 26 to fix the embedding block 21. At the same time, a chemical anchoring agent is filled in the fixing screw hole 26 to enhance the connection strength between the anchor bolt 22 and the old pavement. The bonding plate 23 is fixed on the upper surface of the embedding block 21 as the basis for the connection between the new and old pavements.

[0042] (2) A number of vertical bars 31 are fixed vertically on the upper surface of the bonding plate 23 to provide vertical support. Stirrups 32 are placed on the outside of the vertical bars 31 to form a closed structure and provide lateral restraint. The new pavement 33 is cast above the lap groove 24 to ensure that the new pavement 33 is located on the outside of the vertical bars 31 and stirrups 32 to form an integral structure. The upper surface of the new pavement 33 and the upper surface of the old pavement 1 should be adjusted to the same horizontal plane to ensure that the pavement is flat. The vertical bars 31 are evenly distributed along the length of the bonding plate 23 to provide uniform support. The size of the stirrups 32 matches the vertical bars 31 to ensure the stability of the overall structure, achieve a firm connection between the new and old pavements, and improve the stability and bearing capacity of the pavement overlap.

Claims

1. A pavement overlap structure comprising an old pavement (1), characterized in that: A connecting assembly (2) is provided on the outer side of the old road surface (1), and a reinforcing assembly (3) is provided on the upper surface of the connecting assembly (2); The connecting assembly (2) includes an embedded block (21), an anchor bolt (22) and a bonding plate (23); a lap groove (24) is provided on the outer side of the old pavement (1); an embedded groove (25) is provided on the upper surface of the lap groove (24); the embedded block (21) is inserted into the embedded groove (25); a fixing screw hole (26) is provided between the embedded block (21) and the side opposite to the embedded groove (25); the anchor bolt (22) is threadedly connected to the inner wall of the fixing screw hole (26); and the bonding plate (23) is fixed to the upper surface of the embedded block (21); The reinforcement assembly (3) includes a plurality of vertical bars (31), a plurality of stirrups (32) and a new pavement (33), wherein the plurality of vertical bars (31) are vertically fixed to the upper surface of the plywood (23), the plurality of stirrups (32) are sleeved on the outside of the plurality of vertical bars (31), and the new pavement (33) is cast above the lap groove (24) and is located on the outside of the plurality of vertical bars (31) and the plurality of stirrups (32).

2. A pavement overlap structure according to claim 1, characterized in that: The upper surface of the embedded block (21) and the upper surface of the overlapping groove (24) are located on the same horizontal plane, and the length of the embedded block (21) is equal to the distance between the front and rear inner walls of the embedded groove (25).

3. A pavement overlap structure according to claim 1, characterized in that: The upper surface of the embedded block (21) is provided with a hidden groove corresponding to the position of the fixing screw hole (26), and the head of the anchor bolt (22) is located inside the hidden groove.

4. A pavement overlap structure according to claim 1, characterized in that: The interior of the fixing screw hole (26) and the outside of the anchor bolt (22) are filled with a chemical anchoring agent, and the chemical anchoring agent is a mixed reagent of sodium silicate and sulfuric acid.

5. The pavement overlapping structure according to claim 1, characterized in that: The overlapping groove (24) is a stepped groove, and a connection hole for inserting the anchor bolt (22) is provided on the upper surface of the bonding plate (23).

6. The pavement overlapping structure according to claim 1, characterized in that: The upper surface of the new road surface (33) and the upper surface of the old road surface (1) are located at the same horizontal plane.

7. The pavement overlapping structure according to claim 1, characterized in that: The plurality of vertical ribs (31) are evenly distributed along the length direction of the laminated plate (23).

8. The pavement overlapping structure according to claim 1, characterized in that: The stirrup (32) is rectangular in shape, and the thickness of the stirrup (32) is equal to the diameter of the vertical reinforcement (31).

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