A new splicing structure for repairing old and new roadbeds

Abstract

This invention provides a novel splicing structure for repairing old and new roadbeds. The front edge of the old roadbed is cut into a stepped bottom connecting layer and a top connecting layer. The front edge of the bottom connecting layer is located in front of the top connecting layer, and longitudinal grooves are arranged along the length of the front edge of the bottom connecting layer. The upper surface of the bottom connecting layer is parallel to the road surface. For the front edge of the new roadbed, the base layer is flush with the bottom surface of the bottom connecting layer. A coarse sand concrete layer is laid on top of the base layer and has the same thickness as the bottom connecting layer. The front edge of the coarse sand concrete layer fills the longitudinal grooves, forming an inlay structure with the front edge of the bottom connecting layer. A fine sand concrete layer is laid on top of the coarse sand concrete layer and has the same thickness as the top connecting layer. By employing inclined splicing and mortise and tenon splicing methods, the old and new roadbeds are better integrated, enhancing the tightness of the connection and solving the problems of weak connection and uneven settlement between the old and new roadbeds.

Description

Technical Field

[0001] This utility model relates to the field of concrete pavement repair technology, and in particular provides a novel splicing structure for repairing old and new roadbeds. Background Technology

[0002] In China, with the vigorous development of infrastructure construction, the number of national highway reconstruction and expansion projects is constantly increasing, and the technology of widening concrete pavement is also widely used.

[0003] Currently, the main challenges facing the technology of widening concrete pavements in the reconstruction and expansion of existing national highways include ensuring the overall stability of the old and new pavements, effectively preventing cracking, and extending the service life of the pavement. Therefore, there is an urgent need to develop a new splicing technology for the repair of old and new roadbeds to achieve these objectives. Utility Model Content

[0004] Based on this, the present invention provides a novel splicing structure for repairing old and new roadbeds, so as to ensure the overall stability of the old and new road surfaces, effectively prevent the generation of cracks, and improve the service life of the road surface.

[0005] To achieve the above objectives, this utility model provides a novel splicing structure for repairing old and new roadbeds. The old roadbed's front edge is cut into a stepped bottom connecting layer and a top connecting layer. The front edge of the bottom connecting layer is located in front of the top connecting layer, and longitudinal grooves that are recessed inwards are arranged along the length of the front edge of the bottom connecting layer. The upper surface of the bottom connecting layer is parallel to the road surface. The front edge of the new roadbed includes a base layer, a coarse sand concrete layer, and a fine sand concrete layer. The base layer is flush with the bottom surface of the bottom connecting layer. The coarse sand concrete layer is laid on top of the base layer and has the same thickness as the bottom connecting layer. The front edge of the coarse sand concrete layer fills the longitudinal grooves to form an inlay structure with the front edge of the bottom connecting layer. The fine sand concrete layer is laid on top of the coarse sand concrete layer and has the same thickness as the top connecting layer.

[0006] Furthermore, the front edge of the top connecting layer is arranged parallel to the front edge of the bottom connecting layer, and the horizontal distance from the front edge of the top connecting layer to the bottom connecting layer is 1.2-1.5 times the longitudinal depth of the longitudinal groove.

[0007] Furthermore, the front edge of the top connecting layer is arranged obliquely relative to the upper surface of the bottom connecting layer, and the angle between the front edge and the upper surface is 60°-85°. The front edge of the top connecting layer is coated with a first adhesive layer, and the front edge of the fine sand concrete layer is connected to the first adhesive layer.

[0008] Furthermore, transverse grooves are provided at the middle of the two sides of the longitudinal groove, and the front edge of the coarse sand concrete layer of the new roadbed is filled in the transverse grooves. The edges of the longitudinal groove and the transverse groove are coated with a second adhesive layer, and the coarse sand concrete layer is filled in the second adhesive layer.

[0009] Furthermore, the upper surface of the bottom connecting layer is coated with a third adhesive layer, and the fine sand concrete layer is laid on the upper surface of the third adhesive layer.

[0010] Furthermore, a continuous first non-woven fabric layer is laid on the upper surface of the front edge of the top connecting layer and the fine sand concrete layer, and a waterproof layer is laid on the upper surface of the first non-woven fabric layer.

[0011] Furthermore, the upper surface of the base layer is covered with a non-woven fabric layer and a waterproof layer, and the coarse sand concrete layer is laid on the upper surface of the waterproof layer.

[0012] Furthermore, the bottom connecting layer and the top connecting layer have the same thickness, and the base layer includes, from bottom to top, a roadbed, a crushed stone stabilizing layer and a fine stone stabilizing layer, with non-woven fabric layers laid between adjacent layers.

[0013] The beneficial technical effects of the novel splicing structure for repairing old and new roadbeds provided by this utility model are as follows:

[0014] Firstly, by cutting the front edge of the old roadbed into a stepped bottom connecting layer and a top connecting layer, and with the front edge of the bottom connecting layer located in front of the top connecting layer, the new roadbed and the old roadbed achieve a staggered structure in the vertical direction through the above structure, thereby improving the structural strength of the vertical connection and solving the problem of vertical settlement of the new roadbed.

[0015] Secondly, the front edge of the bottom connecting layer is arranged with inwardly recessed longitudinal grooves along the length direction. The front edge of the coarse sand concrete layer is filled in the longitudinal grooves to form an inlay structure with the front edge of the bottom connecting layer, which improves the structural firmness of the new roadbed and the old roadbed in the horizontal direction of the road surface and solves the problem of horizontal cracks in the new roadbed and the old roadbed.

[0016] Thirdly, the front edge of the new roadbed includes a foundation layer, a coarse sand concrete layer, and a fine sand concrete layer. The foundation layer is flush with the bottom surface of the bottom connecting layer. The coarse sand concrete layer is laid on top of the foundation layer and has the same thickness as the bottom connecting layer. This multi-layer structure improves the stability of the new roadbed itself. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of this application, do not constitute an undue limitation of the present invention.

[0018] Figure 1 This is a three-dimensional connection diagram of a novel splicing structure for repairing old and new roadbeds provided by this utility model.

[0019] Figure 2 This is a side view schematic diagram of a novel splicing structure for repairing old and new roadbeds.

[0020] Figure 3 This is a schematic diagram of the connection between the bottom connecting layer and the coarse sand concrete layer provided by this utility model.

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the old roadbed after cutting and processing provided by this utility model.

[0022] Figure 5 This is a top view of the old roadbed after cutting, provided by this utility model. Attached Figure Description

[0024] 11-Bottom connecting layer, 12-Top connecting layer, 13-Vertical groove, 14-Horizontal groove;

[0025] 21-Base layer, 22-Coarse sand concrete layer, 23-Fine sand concrete layer;

[0026] 31-First adhesive layer, 32-Second adhesive layer, 33-Third adhesive layer. Detailed Implementation

[0027] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. The description of exemplary embodiments is merely illustrative and is in no way intended to limit this disclosure or its application or use. This disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully express the scope of this disclosure to those skilled in the art.

[0028] like Figures 1 to 5As shown, this utility model provides a novel splicing structure for repairing old and new roadbeds. The front edge of the old roadbed is cut into a stepped bottom connecting layer 11 and a top connecting layer 12. The front edge of the bottom connecting layer 11 is located in front of the top connecting layer 12. The front edge of the bottom connecting layer 11 has longitudinally recessed grooves 13 arranged in an array along its length. The upper surface of the bottom connecting layer 11 is parallel to the road surface. The front edge of the new roadbed includes a base layer 21, a coarse sand concrete layer 22, and a fine sand concrete layer 23. The base layer 21 is flush with the bottom surface of the bottom connecting layer 11. The coarse sand concrete layer 22 is laid on top of the base layer 21 and has the same thickness as the bottom connecting layer 11. The front edge of the coarse sand concrete layer 22 is filled in the longitudinal grooves 13 to form an inlay structure with the front edge of the bottom connecting layer 11. The fine sand concrete layer 23 is laid on top of the coarse sand concrete layer 22 and has the same thickness as the top connecting layer 12.

[0029] By cutting the front edge of the old roadbed into a stepped bottom connection layer and a top connection layer, with the front edge of the bottom connection layer located in front of the top connection layer, the new roadbed and the old roadbed achieve a staggered structure in the vertical direction through the above structure, which improves the structural strength of the vertical connection and solves the problem of vertical settlement of the new roadbed.

[0030] The front edge of the top connecting layer 12 is parallel to the front edge of the bottom connecting layer 11. The horizontal distance from the front edge of the top connecting layer 12 to the bottom connecting layer 11 is 1.2-1.5 times the longitudinal depth of the longitudinal groove 13. The front edge of the bottom connecting layer has inwardly recessed longitudinal grooves arranged in an array along its length. The front edge of the coarse sand concrete layer fills the longitudinal grooves to form an inlay structure with the front edge of the bottom connecting layer, improving the structural strength of the new and old roadbeds along the horizontal direction of the road surface and solving the problem of horizontal cracks in the new and old roadbeds.

[0031] The front edge of the new roadbed includes a base layer, a coarse sand concrete layer, and a fine sand concrete layer. The base layer is flush with the bottom surface of the bottom connecting layer. The coarse sand concrete layer is laid on top of the base layer and has the same thickness as the bottom connecting layer, creating a multi-layer structure that improves the stability of the new roadbed. The front edge of the top connecting layer is obliquely arranged relative to the upper surface of the bottom connecting layer 11, with an angle of 60°-85° between the front edge and the upper surface. The front edge of the top connecting layer 12 is coated with a first adhesive layer 31, and the front edge of the fine sand concrete layer 23 is connected to the first adhesive layer 31. Transverse grooves 14 are provided in the middle of the two sides of the longitudinal groove 13. The front edge of the coarse sand concrete layer 22 of the new roadbed fills the transverse grooves 14. The edges of the longitudinal groove 13 and the transverse groove 14 are coated with a second adhesive layer 32, and the coarse sand concrete layer 22 fills the second adhesive layer 32. The upper surface of the bottom connecting layer 11 is coated with a third adhesive layer 33, and the fine sand concrete layer 23 is laid on the upper surface of the third adhesive layer 33. A continuous first non-woven fabric layer is laid on the upper surface of the front edge of the top connecting layer 12 and the fine sand concrete layer 23, and a waterproof layer is laid on the upper surface of the first non-woven fabric layer. The bonding layers enhance the strength of the connection.

[0032] The upper surface of the base layer 21 is covered with a non-woven fabric layer and a waterproof layer, and the coarse sand concrete layer 22 is laid on the upper surface of the waterproof layer. The bottom connecting layer 11 and the top connecting layer 12 have the same thickness. The base layer 21 includes, from bottom to top, a roadbed, a crushed stone stabilization layer, and a fine stone stabilization layer, with a non-woven fabric layer laid between each adjacent layer. The above structure improves the foundation's stability.

[0033] These technologies each have their own characteristics. For example, precast slab widening technology has the advantages of fast construction speed and minimal impact on traffic; cast-in-place widening technology can achieve a tight bond between new and old pavements, improving overall stability; while semi-precast and semi-cast-in-place technology combines the advantages of the former two, making it more flexible and versatile. However, in practical applications, these technologies still need to consider various factors, such as climate conditions, traffic flow, and material properties, to ensure project quality and safety.

[0034] First, improving road load-bearing capacity is fundamental to ensuring the efficient and safe operation of National Highway G358. Through in-depth research into concrete pavement widening technology, we can accurately grasp the key technical aspects of road widening, effectively improving the road's load-bearing capacity to adapt to the ever-increasing traffic flow.

[0035] Secondly, extending the service life of roads is an important way to reduce maintenance costs and improve economic efficiency. Scientific road widening technology can reduce early damage caused by road widening, extend the service life of the road surface, and reduce future maintenance costs.

[0036] Furthermore, ensuring traffic safety is the primary task of road construction. Through rigorous research on concrete pavement widening technology, we can design more rational pavement structures, reduce traffic accidents, and ensure the safety of people's lives and property.

[0037] Furthermore, promoting technological progress and innovation is key to improving the level of national transportation construction. Research on the concrete pavement widening technology for the reconstruction and expansion of National Highway G358 will drive the progress and innovation of related technologies in China, enhance the technical level of my country's road construction, and strengthen its international competitiveness.

[0038] In conclusion, the necessity of initiating the research project on concrete pavement widening technology for the reconstruction and expansion of National Highway G358 lies in its irreplaceable role in improving road performance, optimizing the transportation network, ensuring traffic safety, and promoting technological progress. This initiative will lay a solid foundation for the long-term development of the nation's transportation infrastructure.

[0039] The project plans to conduct research on the technology of widening concrete pavement in the reconstruction and expansion of existing national highways in order to effectively control safety, quality and environmental protection during the construction process.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A novel splicing structure for repairing old and new roadbeds, characterized in that, The front edge of the old roadbed is cut into a stepped bottom connecting layer (11) and a top connecting layer (12). The front edge of the bottom connecting layer (11) is located in front of the top connecting layer (12), and the front edge of the bottom connecting layer (11) is arranged with inwardly recessed longitudinal grooves (13) along the length direction. The upper surface of the bottom connecting layer (11) is arranged parallel to the road surface. The front edge of the new roadbed includes a base layer (21), a coarse sand concrete layer (22), and a fine sand concrete layer (23). The base layer (21) is flush with the bottom surface of the bottom connecting layer (11). The coarse sand concrete layer (22) is laid on top of the base layer (21) and has the same thickness as the bottom connecting layer (11). The front edge of the coarse sand concrete layer (22) is filled in the longitudinal groove (13) to form an inlay structure with the front edge of the bottom connecting layer (11). The fine sand concrete layer (23) is laid on top of the coarse sand concrete layer (22) and has the same thickness as the top connecting layer (12).

2. The novel splicing structure for repairing old and new roadbeds according to claim 1, characterized in that, The front edge of the top connecting layer (12) is parallel to the front edge of the bottom connecting layer (11), and the horizontal distance from the front edge of the top connecting layer (12) to the bottom connecting layer (11) is 1.2-1.5 times the longitudinal depth of the longitudinal groove (13).

3. The novel splicing structure for repairing old and new roadbeds according to claim 1, characterized in that, The front edge of the top connecting layer (12) is arranged obliquely relative to the upper surface of the bottom connecting layer (11), and the angle between the front edge and the upper surface is 60°-85°. The front edge of the top connecting layer (12) is coated with a first adhesive layer (31), and the front edge of the fine sand concrete layer (23) is connected to the first adhesive layer (31).

4. The novel splicing structure for repairing old and new roadbeds according to claim 1 or 2, characterized in that, A transverse groove (14) is provided at the middle of the two sides of the longitudinal groove (13). The front edge of the coarse sand concrete layer (22) of the new roadbed is filled in the transverse groove (14). The edges of the longitudinal groove (13) and the transverse groove (14) are coated with a second adhesive layer (32). The coarse sand concrete layer (22) is filled in the second adhesive layer (32).

5. The novel splicing structure for repairing old and new roadbeds according to claim 1, characterized in that, The upper surface of the bottom connecting layer (11) is coated with a third adhesive layer (33), and the fine sand concrete layer (23) is laid on the upper surface of the third adhesive layer (33).

6. The novel splicing structure for repairing old and new roadbeds according to claim 1, characterized in that, The top connecting layer (12) and the upper surface of the fine sand concrete layer (23) are covered with a continuous first non-woven fabric layer, and the upper surface of the first non-woven fabric layer is covered with a waterproof layer.

7. The novel splicing structure for repairing old and new roadbeds according to claim 1, characterized in that, The upper surface of the base layer (21) is covered with a non-woven fabric layer and a waterproof layer, and the coarse sand concrete layer (22) is laid on the upper surface of the waterproof layer.

8. The novel splicing structure for repairing old and new roadbeds according to claim 7, characterized in that, The bottom connecting layer (11) and the top connecting layer (12) have the same thickness. The base layer (21) includes a roadbed, a crushed stone stabilization layer and a fine stone stabilization layer from bottom to top. Non-woven fabric layers are laid between adjacent layers.

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