Bridge concrete exposed reinforcement repair and reinforcement structure

Abstract

This utility model relates to a repair and reinforcement structure for exposed rebar in bridge concrete. It includes an epoxy mortar layer for wrapping the exposed rebar, a lower structural adhesive layer on top of the epoxy mortar layer, and a steel plate on top of the lower structural adhesive layer. The steel plate is bolted into the bridge concrete; the lower end of the bolt is embedded in the bridge concrete, and the upper end of the bolt passes through the steel plate and is screwed with a nut. This utility model effectively isolates the exposed rebar from the air through the epoxy mortar layer and the lower structural adhesive layer, preventing secondary oxidation. The steel plate and the embedded bolts provide reinforcement, and the lower structural adhesive layer also serves to bond and fix the steel plate.

Description

Technical Field

[0001] This utility model relates to a repair and reinforcement structure for exposed rebar in bridge concrete. Background Technology

[0002] Exposed rebar in bridge concrete can compromise the integrity and stability of the bridge structure, and in severe cases, may even lead to bridge collapse. Existing rebar repair structures, such as the one disclosed in Chinese utility model CN ​​215760654U, involve installing a support frame to protect the exposed rebar. This support frame is fixed to the original concrete by rebar anchoring, and finally, newly poured concrete is used to encase the exposed rebar, the anchored rebar, and the support frame, thus repairing the exposed rebar. However, this repair structure has poor waterproofing and reinforcement effects. Utility Model Content

[0003] The purpose of this utility model is to propose a bridge concrete exposed rebar repair and reinforcement structure, including an epoxy mortar layer for wrapping the exposed rebar, a lower structural adhesive layer on the epoxy mortar layer, and a steel plate on the lower structural adhesive layer. The steel plate is bolted into the bridge concrete. The lower end of the bolt is inserted into the bridge concrete, and the upper end of the bolt passes through the steel plate and is screwed with a nut.

[0004] This invention effectively isolates exposed steel bars from the air through an epoxy mortar layer and a lower structural adhesive layer, preventing secondary oxidation. The steel plate and the implanted bolts provide reinforcement. In addition, the lower structural adhesive layer also serves to bond and fix the steel plate. Attached Figure Description

[0005] Figure 1 A schematic diagram of the structure of this utility model after installation is shown;

[0006] Figure 2 A schematic diagram of the structure of this utility model is shown;

[0007] Figure 3 A schematic diagram of the repair and reinforcement process of this utility model is shown.

[0008] Icon labels:

[0009] 10 Exposed reinforcing steel; 20 Epoxy mortar layer; 30 Lower structural adhesive layer; 40 Steel plate; 50 Bridge concrete; 60 Bolts, 601 Nuts; 70 Upper structural adhesive layer; 80 Surface layer. Detailed Implementation

[0010] The following description, in conjunction with the accompanying drawings, further illustrates the proposed solution.

[0011] like Figures 1 to 3The diagram illustrates a bridge concrete exposed rebar repair and reinforcement structure, comprising an epoxy mortar layer 20 for wrapping the exposed rebar 10, a lower structural adhesive layer 30 on the epoxy mortar layer 20, and a steel plate 40 on the lower structural adhesive layer 30. The steel plate 40 is locked in place by bolts 60 embedded in the bridge concrete 50; the lower end of the bolts 60 is embedded in the bridge concrete 50, and the upper end of the bolts 60 passes through the steel plate 40 and is screwed with nuts 601. This technical solution effectively isolates the exposed rebar from the air through the epoxy mortar layer and the lower structural adhesive layer, preventing secondary oxidation. The steel plate and the embedded bolts provide reinforcement, and the lower structural adhesive layer also serves to bond and fix the steel plate.

[0012] The steel plate 40 is provided with an upper structural adhesive layer 70, which covers the upper end of the bolt 60 and the nut 601. A surface layer 80 is provided on the upper structural adhesive layer 70, and the surface layer 80 is flush with the surface of the bridge concrete 50. This technical solution achieves a further waterproof and sealing effect by setting an upper structural adhesive layer, while also ensuring adhesion between the structural adhesive layer and the surface layer.

[0013] The surface layer 80 can be an asphalt layer or a concrete layer.

[0014] The surface layer 80 is a prefabricated panel, and this technical solution can improve construction efficiency and speed up project progress.

[0015] The epoxy mortar and structural adhesive described in this embodiment can both be obtained using existing technologies, and will not be elaborated further here.

[0016] like Figure 3 As shown, the repair and reinforcement process of this utility model can be seen as follows:

[0017] 1. Clean the exposed steel bars and the surrounding broken and loose concrete, remove rust and attachments from the surface of the exposed steel bars, and apply anti-rust paint to the cleaned steel bars for rust prevention.

[0018] 2. Drill holes and embed bolts: Drill holes in the cleaned concrete and then embed anchors (i.e., bolts) in the drilled holes.

[0019] 3. Use epoxy mortar to fill and form an epoxy mortar layer, wherein the epoxy mortar filling should be higher than the exposed steel bars so that the epoxy mortar layer can wrap the exposed steel bars.

[0020] 4. After the epoxy mortar layer has formed, fill the epoxy mortar layer with structural adhesive to form the lower structural adhesive layer.

[0021] 5. Attach the steel plate. Select a steel plate of appropriate size and attach it to the lower structural adhesive layer. Ensure that the upper end of the bolt passes through the pre-drilled hole in the steel plate. The surface of the selected steel plate can be treated with anti-corrosion coating.

[0022] 6. Anchoring: Screw a nut onto the upper end of the bolt to secure the steel plate.

[0023] 7. Fill the steel plate with structural adhesive to form the upper structural adhesive layer.

[0024] 8. Select appropriately sized precast asphalt or concrete slabs and adhere them to the upper structural adhesive layer to form the surface layer. Afterward, structural adhesive can be filled into the edges of the precast slabs to achieve a sealing effect.

[0025] This invention is particularly suitable for local repairs of areas with deeply exposed tendons and small areas.

Claims

1. A bridge concrete exposed reinforcement repair and reinforcement structure comprising an epoxy mortar layer for wrapping exposed reinforcement, characterised in that: A lower structural adhesive layer is provided on the epoxy mortar layer, and a steel plate is provided on the lower structural adhesive layer. The steel plate is locked by bolts embedded in the bridge concrete. The lower end of the bolt is embedded in the bridge concrete, and the upper end of the bolt passes through the steel plate and is screwed with a nut.

2. The bridge concrete exposed reinforcing patch reinforcement structure of claim 1, wherein: The steel plate is provided with an upper structural adhesive layer, which wraps the upper end of the bolt and the nut. A surface layer is provided on the upper structural adhesive layer, and the surface layer is flush with the surface of the bridge concrete.

3. The exposed reinforcing patch repair and reinforcement structure for bridge concrete according to claim 2, characterized in that: The surface layer is either an asphalt layer or a concrete layer.

4. The exposed reinforcement patching and reinforcing structure for bridge concrete according to claim 2 or 3, characterized in that: The surface layer is a prefabricated panel.

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