Graphene polyurea buffer protection structure for bridge expansion joint connecting part

Abstract

The utility model relates to a graphene polyurea buffer protection structure for a bridge expansion joint connecting part, which comprises buffer protection parts arranged on two sides of a center line of a bridge expansion joint and parallel or perpendicular to a bridge axis, the buffer protection parts wrap an upper portion of an anchoring structure, and a C50 epoxy resin concrete layer wraps a lower portion of the anchoring structure. The buffer protection part sequentially comprises an epoxy resin primer layer, a polyurea middle coating and a graphene polyurea finish paint layer from bottom to top, the section of the polyurea middle coating is of an L-shaped side wrapping anchoring structure, and the graphene polyurea finish paint layer covers part of the bridge deck pavement layer.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge engineering technical field, concretely relates to a bridge expansion joint connecting part graphene polyurea buffer protection structure. BACKGROUND

[0002] In recent years, with the rapid development of China's economy, the construction pace of expressway is also accelerating unceasingly, and the management work of expressway also becomes increasingly heavy and complex, needs to face new problems and challenges unceasingly, and the maintenance of bridge expansion joint is an important branch field. With the increasing number of highway operation mileage in the whole country, the bridge retention quantity of road section in operation is unprecedentedly huge, due to the influence of natural environment, corrosive substance, vehicle load impact and various factors, a large number of bridge expansion joints appear a lot of cracking, extrusion, aging, peeling phenomenon in the operation process, which greatly influences the stability, comfort and safety in the use process of bridge, and needs to be repaired and disposed in time. However, under the action of high and low temperature, snow-melting agent and load impact, the commonly used bridge expansion joint is prone to aging and cracking, reduces the function of bridge expansion joint, seriously influences the speed, comfort and safety of driving, and even causes driving safety accidents. SUMMARY

[0003] In view of the problems existing in the operation process of the current bridge expansion joint, the utility model provides a kind of polyurea elastomer buffer protection layer structure of bridge expansion joint connecting part, compared with the bridge expansion joint before reconstruction, polyurea elastomer buffer protection layer is optimized and increased between expansion joint and pavement surface layer, using the excellent base material bonding property, elastic property, protection performance and mechanical property of the structure, the buffer effect of bridge expansion joint can be further improved, and the weather resistance and waterproof performance of expansion joint are increased, the service life of bridge expansion joint is prolonged.

[0004] A kind of polyurea elastomer buffer protection layer structure of bridge expansion joint connecting part, it includes: buffer protection part parallel or perpendicular to bridge axis is arranged on the both sides of bridge expansion joint center line, buffer protection part covers the upper portion of anchoring structure, C50 epoxy resin concrete layer covers the lower portion of anchoring structure, buffer protection part includes epoxy resin primer layer, polyurea intermediate coating and graphene polyurea finish layer from bottom to top in sequence, polyurea intermediate coating section is L-shaped side package anchoring structure, and graphene polyurea finish layer covers part bridge deck pavement.

[0005] Preferably, the thickness of the epoxy resin primer layer is 20mm.

[0006] Preferably, the thickness of the polyurea intermediate coating is 50-150mm.

[0007] Preferably, the thickness of the graphene polyurea finish layer is 0.1-0.2mm.

[0008] The utility model discloses a technical effect brought by it:

[0009] Bridge expansion joint connecting part polyurea elastomer buffer protection layer structure mainly by epoxy resin, polyurea elastomer, wear -resisting type polyurea finish combination, wherein the primer is high permeability epoxy resin, is used to connect concrete and coating structure, can increase the cohesive ability of whole coating structure and concrete simultaneously;The intermediate layer is polyurea elastomer, and the buffer effect of bridge expansion joint is improved by utilizing the excellent mechanical properties (elasticity, aging resistance, etc.) of polyurea elastomer;The finish is wear -resisting type polyurea finish, and it has excellent wear resistance, good aging resistance, chloride ion resistance, corrosion resistance and anti-substrate deformation ability.This patent adds polyurea elastomer buffer protection layer structure between bridge expansion joint and pavement surface course according to the structural characteristics of traditional expansion joint, and the protection effect of expansion joint device is increased. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the cross section view of bridge expansion joint connecting part polyurea elastomer buffer protection layer structure;

[0011] Among them: expansion joint center 1, expansion joint both sides (2, 3), bridge expansion joint anchoring structure (4, 5), C50 epoxy resin concrete (6, 7), bridge deck pavement (8, 9), primer layer 10, polyurea intermediate coating 11, finish layer 12, h1 is the length of finish layer 12, h2 is the length of polyurea intermediate coating 11, h3 is the length of primer layer 10. DETAILED DESCRIPTION

[0012] The utility model discloses a kind of bridge expansion joint connecting part graphene polyurea buffer protection structures, which will be further described in detail as follows by combining with the attached drawings and specific examples: EMBODIMENT

[0013] Figure 1 It is the schematic diagram of optimized bridge expansion joint structure, and polyurea elastomer buffer protection layer structure is added between expansion joint and bridge surface course;Wherein 1 is expansion joint center, 2, 3 are expansion joint both sides, usually set expansion joint between two beam ends, between beam end and abutment or hinged position of bridge. Expansion joint is required to freely expand in two directions parallel and perpendicular to bridge axis, firm and reliable, when vehicle drives, it should be smooth, without sudden jump and noise;4, 5 are bridge expansion joint anchoring structure;6, 7 are C50 epoxy resin concrete;8, 9 are bridge deck pavement;Primer layer 10 is 20mm thick, polyurea intermediate coating 11 is 50-150mm thick, and finish layer 12 is 0.1-0.2mm thick, wherein length h1 is 550mm, h2 is 450mm, and h3 is 100mm, and construction is carried out layer by layer using spraying process.

[0014] Compared with a traditional simple expansion joint device, the buffer protection layer structure is added with a three-layer structure of epoxy resin, polyurea elastomer and wear-resistant polyurea finish, and can provide better buffer protection for the bridge expansion joint due to excellent concrete substrate bonding performance, mechanical properties, aging resistance, waterproof performance and substrate deformation resistance, thereby reducing the impact of vehicle driving and the influence of natural environment aging, and greatly improving the service life of the expansion joint.

[0015] The above has made a detailed description of the examples of the utility model in combination with the embodiments, but the utility model is not limited to the above examples, and various changes can be made within the knowledge range possessed by those skilled in the art without departing from the purpose of the utility model, which should also be regarded as the protection range of the utility model.

Claims

1. A graphene polyurea cushioning protection structure for bridge expansion joint connecting part, characterized in that, The utility model relates to a bridge expansion joint protection structure, including: Buffer protection parts are arranged on both sides of the bridge expansion joint center line and are parallel or perpendicular to the bridge axis, the buffer protection parts cover the upper part of the anchoring structure, a C50 epoxy resin concrete layer covers the lower part of the anchoring structure, the buffer protection parts sequentially include an epoxy resin primer layer, a polyurea intermediate coating and a graphene polyurea finish coating from bottom to top, the cross section of the polyurea intermediate coating is L-shaped and side covers the anchoring structure, and the graphene polyurea finish coating covers part of the bridge deck pavement.

2. The graphene polyurea bumper protection structure for bridge joint connection according to claim 1, characterized in that, The thickness of the epoxy resin primer layer is 20 mm.

3. The graphene polyurea bumper protection structure for bridge joint connection according to claim 1, characterized in that, The thickness of the polyurea intermediate coating is 50-150 mm.

4. The graphene polyurea bumper protection structure for bridge joint connection according to claim 1, characterized in that, The thickness of the graphene polyurea finish coating is 0.1-0.2 mm.

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