Seamless expansion joint structure of concrete bridge

Abstract

The utility model discloses a concrete bridge seamless expansion joint structure which comprises a bridge body, a deformation joint is reserved on the bridge body, a containing groove is formed in the top of the bridge body, an expansion piece adapting to bridge body structure deformation is arranged in the containing groove, and the expansion piece comprises an elastic bottom layer. The elastic bottom layer is arranged at the inner bottom of the containing groove, the top of the elastic bottom layer is provided with a wear-resisting surface layer, and the top of the wear-resisting surface layer is provided with a water guiding assembly for preventing water accumulation on the bridge floor. The problems of vehicle bumping, noise and water seepage caused by physical gaps of a traditional expansion joint are avoided, the driving stability and safety are remarkably improved, the problems of sealing failure and poor durability of the traditional expansion joint are solved through the seamless, compound and anti-corrosion optimized structural design, and balance of bridge structure deformation adaptability and long-term sealing performance is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to concrete bridge technical field, concretely is a kind of concrete bridge seamless expansion joint structure. BACKGROUND

[0002] In bridge engineering, expansion joint as the key component connecting bridge superstructure and substructure, its performance directly affects the durability, safety and driving comfort of bridge, traditional concrete bridge expansion joint technology mainly relies on rubber strip, steel plate or comb plate structure form, through reserved gap to realize the free deformation of bridge under temperature change, live load effect and foundation settlement, however, with the increase of traffic flow, the increase of heavy vehicle and the frequent occurrence of extreme weather, the limitations of traditional expansion joint are increasingly highlighted.

[0003] Specifically, traditional rubber sealing strip is prone to water seepage due to aging, wear or falling off, after rainwater seeps into the interior of bridge structure, it can cause steel corrosion, concrete carbonization and other diseases, shorten the service life of bridge, in addition, water seepage ice expansion can also directly damage expansion joint structure, form vicious cycle, therefore we need to propose a kind of concrete bridge seamless expansion joint structure. SUMMARY

[0004] The utility model aims at providing a kind of concrete bridge seamless expansion joint structure, to solve the problems proposed in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of concrete bridge seamless expansion joint structure, including bridge body, the bridge body is reserved with deformation joint, the top of the bridge body is provided with accommodating groove, the inside of the accommodating groove is provided with expansion joint that adapts to the deformation of bridge body structure, the expansion joint includes elastic bottom layer, the elastic bottom layer is arranged in the inner bottom of accommodating groove, the top of the elastic bottom layer is provided with wear-resistant surface layer, the top of the wear-resistant surface layer is provided with water guide assembly that prevents bridge water.

[0007] Preferably, the elastic bottom layer includes support framework, the top of the support framework is provided with flexible buffer layer.

[0008] Preferably, the support framework is made of stainless steel material, and the surface of the support framework is provided with nano anticorrosive coating.

[0009] Preferably, the flexible buffer layer is made of polyurethane elastomer, and the wear-resistant surface layer is made of epoxy resin and corundum mixture.

[0010] Preferably, the water guide assembly comprises a water guide groove, which is arranged on the top of the wear-resistant surface layer, and a drain pipe is fixedly arranged in the water guide groove, and a plurality of groups of through holes are arranged on the top of the drain pipe.

[0011] Preferably, the bridge body further comprises a reinforcing mesh, which is arranged between the support framework and the flexible buffer layer, and the reinforcing mesh is a glass fiber mesh.

[0012] Preferably, the bridge body comprises a concrete panel, an asphalt pavement layer is arranged on the top of the concrete panel, and a cement concrete layer is arranged on one side of the concrete panel.

[0013] Preferably, a plurality of groups of riveted steel bars are arranged in the cement concrete layer, one end of each group of the riveted steel bars is fixedly connected to the two sides of the support framework, a plurality of groups of shear nails are fixedly connected to the bottom of the support framework, and the bottom end of each group of the shear nails is fixedly connected to the concrete panel.

[0014] Compared with the prior art, the bridge body has the advantages that:

[0015] The bridge body has the advantages that: the elastic bottom layer and the wear-resistant surface layer are combined to completely fill the deformation joint of the bridge body, the problems of bumping, noise and water seepage caused by the physical gap of the traditional expansion joint are avoided, the driving stability and safety are significantly improved, the problems of sealing failure and poor durability of the traditional expansion joint are solved through the seamless, combined and corrosion-resistant structure design, and the balance between the deformation adaptability and the long-term sealing performance of the bridge structure is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Fig. 1 is a structural schematic view of the bridge body;

[0017] Figure 2 Fig. 2 is a structural schematic view of the shaft side of the bridge body;

[0018] Figure 3 Fig. 3 is a structural schematic view of the expansion joint of the bridge body;

[0019] Figure 4 Fig. 4 is a structural schematic view of the elastic bottom layer, the wear-resistant surface layer and the reinforcing mesh of the bridge body.

[0020] In the drawings: 1, bridge body; 101, concrete panel; 102, asphalt pavement layer; 103, cement concrete layer; 2, deformation joint; 3, accommodating groove; 4, expansion joint; 401, elastic bottom layer; 4011, support framework; 4012, flexible buffer layer; 402, wear-resistant surface layer; 5, water guide assembly; 501, water guide groove; 502, drain pipe; 503, through hole; 6, nano corrosion-resistant coating; 7, reinforcing mesh; 8, riveted steel bar; 9, shear nail. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Please refer to Figures 1-4 The utility model provides a technical scheme:

[0023] A kind of seamless expansion joint structure of concrete bridge, including bridge body 1, bridge body 1 is reserved with deformation joint 2, top of bridge body 1 is set with accommodating groove 3, accommodating groove 3 is provided with expansion piece 4 that adapts to the structural deformation of bridge body 1, bridge body 1 releases deformation stress caused by temperature, load and settlement through reserving deformation joint 2, deformation joint 2 is integrally arranged with accommodating groove 3, accommodating groove 3 provides mounting space for expansion piece 4, ensure its deformation with bridge body 1, avoid structural damage caused by rigid connection of traditional expansion joint;

[0024] Expansion piece 4 includes elastic bottom layer 401, the contact surface of elastic bottom layer 401 and bridge body concrete is processed into sawtooth shape inlay structure (tooth height 5mm, interval 20mm), interface shear strength is promoted by mechanical occlusion, elastic bottom layer 401 is set to the inner bottom of accommodating groove 3, the top of elastic bottom layer 401 is provided with wear-resistant surface layer 402, wear-resistant surface layer 402 surface is provided with horizontal micro-convex grain, can increase tire friction coefficient, while avoiding water retention, the top of wear-resistant surface layer 402 is provided with water guide assembly 5 for preventing bridge water, elastic bottom layer 401 bears deformation buffer function, wear-resistant surface layer 402 provides driving surface protection, water guide assembly 5 reduces the risk of water seepage by rapid drainage, three-layer structure cooperates to realize the integrated design of "deformation-wear-proof-waterproof";

[0025] Elastic bottom layer 401 includes support framework 4011, the top of support framework 4011 is provided with flexible buffer layer 4012, support framework 4011 provides structural strength, flexible buffer layer 4012 absorbs bridge displacement by elastic deformation, both rigid and flexible are considered, to ensure the stability of expansion piece 4 under complex stress;

[0026] Support framework 4011 is made of 304 stainless steel material, and the surface of support framework 4011 is provided with nano anticorrosive coating 6, the nano anticorrosive coating 6 is set as graphene modified epoxy coating, the combination of 304 stainless steel and nano anticorrosive coating 6 can resist chloride ion erosion;

[0027] The flexible buffer layer 4012 is made of polyurethane elastomer, and the wear-resistant surface layer 402 is made of epoxy resin mixed with carborundum. The polyurethane elastomer (tensile strength ≥ 25 MPa, elongation at break ≥ 400%) is suitable for large deformation, and the epoxy resin-carborundum surface layer (Mohs hardness ≥ 7) has excellent wear resistance, which significantly improves the structural durability. When the bridge body 1 deforms due to temperature change, vehicle load or foundation settlement, the flexible buffer layer 4012 absorbs the displacement through elastic deformation, and the support framework 4011 keeps the structural framework stable, avoiding the disengagement or jamming of the expansion joint 4.

[0028] The water guide assembly 5 comprises a water guide groove 501 which is arranged on the top of the wear-resistant surface layer 402. The water guide groove 501 is internally fixedly embedded with a drain pipe 502. A plurality of groups of through holes 503 are arranged on the top of the drain pipe 502. The water guide groove 501 is designed to guide the rainwater to flow to the drain pipe 502, effectively avoiding the penetration of the accumulated water on the bridge into the inside of the bridge body 1.

[0029] The reinforcing mesh 7 is arranged between the support framework 4011 and the flexible buffer layer 4012, and the reinforcing mesh 7 is made of glass fiber mesh cloth. Similarly, the reinforcing mesh 7 is arranged between the flexible buffer layer 4012 and the wear-resistant surface layer 402. The glass fiber mesh cloth (tensile strength ≥ 2000 MPa) enhances the interlayer bonding force and improves the overall shear performance of the expansion joint 4.

[0030] The bridge body 1 comprises a concrete panel 101. The top of the concrete panel 101 is provided with an asphalt pavement layer 102. The concrete panel 101 is provided with a cement concrete layer 103 on one side of the asphalt pavement layer 102. An SBS modified asphalt bonding layer is arranged between the asphalt pavement layer 102 and the cement concrete layer 103. A composite bridge deck structure is formed through a hot rolling process.

[0031] A plurality of groups of riveted steel bars 8 are arranged in the cement concrete layer 103. One end of each group of the riveted steel bars 8 is fixedly connected to the two sides of the support framework 4011. The riveted steel bars 8 are made of HRB400 threaded steel with a diameter of 12 mm and a pre-buried depth of 300 mm. The exposed end is wrapped with epoxy mortar after being welded to the support framework 4011. The bottom of the support framework 4011 is fixedly connected with a plurality of groups of shear nails 9. The bottom end of each group of the shear nails 9 is fixedly connected to the concrete panel 101. The shear nails 9 are stud type connecting pieces arranged in a quincunx shape. The shear nails 9 are connected to the pre-buried steel plate in the concrete panel 101 through a special welding machine. The riveted steel bars 8 and the shear nails 9 form double anchoring, ensuring the cooperative work of the expansion joint 4 and the bridge body 1. The cement concrete layer 103 provides additional support and improves the overall stability of the structure. The seamless, durable and low-maintenance of the bridge expansion joint are realized through the multi-layer composite structure, high-performance materials and optimized connection design, which significantly improves the safety and service life of the bridge structure.

[0032] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A seamless expansion joint structure for a concrete bridge comprising a bridge body (1) characterised in that: The bridge body (1) is reserved with a deformation joint (2), the top of the bridge body (1) is provided with a containing groove (3), the inside of the containing groove (3) is provided with a telescopic part (4) adapting to the structural deformation of the bridge body (1), the telescopic part (4) comprises an elastic bottom layer (401), the elastic bottom layer (401) is arranged at the inner bottom of the containing groove (3), the top of the elastic bottom layer (401) is provided with a wear-resistant surface layer (402), and the top of the wear-resistant surface layer (402) is provided with a water guide assembly (5) for preventing water on the bridge.

2. A seamless expansion joint structure for a concrete bridge according to claim 1, characterized in that: The elastic bottom layer (401) comprises a supporting framework (4011), and the top of the supporting framework (4011) is provided with a flexible buffer layer (4012).

3. A seamless expansion joint structure for a concrete bridge according to claim 2, wherein: The supporting framework (4011) is made of 304 stainless steel, and the surface of the supporting framework (4011) is provided with a nano anti-corrosion coating (6).

4. A concrete bridge seamless expansion joint structure according to claim 3, characterized in that: The flexible buffer layer (4012) is made of polyurethane elastomer, and the wear-resistant surface layer (402) is made of a mixture of epoxy resin and diamond sand.

5. A seamless expansion joint structure for concrete bridges as claimed in claim 1 wherein: The water guide assembly (5) comprises a water guide groove (501), the water guide groove (501) is arranged at the top of the wear-resistant surface layer (402), and the inside of the water guide groove (501) is fixedly embedded with a drain pipe (502), and the top of the drain pipe (502) is provided with a plurality of groups of through holes (503).

6. A seamless expansion joint structure for concrete bridges according to claim 2, characterized in that: It also comprises a reinforcing grid (7), which is arranged between the supporting framework (4011) and the flexible buffer layer (4012), and the reinforcing grid (7) is made of glass fiber mesh cloth.

7. A seamless expansion joint structure for concrete bridges according to claim 3, characterized in that: The bridge body (1) comprises a concrete panel (101), the top of the concrete panel (101) is provided with an asphalt paving layer (102), and the concrete panel (101) is provided with a cement concrete layer (103) on one side of the asphalt paving layer (102).

8. A concrete bridge seamless expansion joint structure according to claim 7, characterized in that: The inside of the cement concrete layer (103) is provided with a plurality of groups of riveted steel bars (8), one end of each group of the riveted steel bars (8) is fixedly connected with the two sides of the supporting framework (4011), the bottom of the supporting framework (4011) is fixedly connected with a plurality of groups of shear nails (9), and the bottom ends of each group of the shear nails (9) are fixedly connected with the concrete panel (101).

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