Views: 246 Author: Site Editor Publish Time: 2024-10-29 Origin: Site
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1. Prestressing Reinforcement Method
2. Steel-Jacketing Reinforcement Method
3. External Steel Bonding Reinforcement Method
Bailey bridges, as a widely used structural form in both temporary and permanent bridge construction, may encounter performance degradation or the need to enhance load-bearing capacity for their concrete components during long-term use or under specific construction conditions. In response to these requirements, the following are several proven reinforcement methods for concrete components of Bailey bridges, aimed at improving their overall stability and safety.
Before installing prestressing rods, they must be precisely straightened and calibrated to ensure accurate rod size and position.
Welded joints, screws, and nuts of the rods should be thoroughly inspected to ensure their quality meets standards.
Verify the embedment depth and quality of the force-transmitting welds between the angle steel (including the shim plate) at the end of the brace and the concrete component.
After preliminary inspection, temporarily fix the ends of the brace using bolts.
Then, use high-strength epoxy mortar or cement mortar for filling to ensure structural tightness.
Rust-proof paint should be applied to the reinforced compression rods, connecting plates, baffle plates, and tension bolts to prevent corrosion.
The concrete surface should be ground to ensure it is smooth and free of debris and dust.
Rust removal treatment should be performed on the steel plate, and it should be cleaned with acetone or xylene along with the concrete surface to ensure a clean bonding surface.
Apply latex cement paste or epoxy resin grouting material to the prepared angle steel and concrete surface.
Attach the steel plate to the concrete surface and perform grouting to ensure tight bonding between the steel plate and concrete.
Select an appropriate adhesive and strictly follow the instructions for mixing to ensure bonding effectiveness.
Mixing should be uniform to ensure the bonding surface is full and dense, avoiding bubbles.
Preparation:
Clean dust from the concrete surface and wipe it with acetone to ensure it is clean.
Perform rust removal on the steel plate surface until it presents a metallic shine, and the grinding texture should be perpendicular to the stress direction.
Choose a suitable adhesive and strictly follow the instructions for mixing.
Evenly apply the adhesive to the concrete and steel plate surfaces for bonding.
Ensure the bonding surface is full and dense, with no bubbles.
There are various types of structural adhesives for buildings on the market. Selection should be cautious to ensure they meet project requirements.
During the construction process, strictly control the mixing ratio and uniformity of the adhesive to ensure bonding quality.
There are numerous reinforcement methods for concrete components of Bailey bridges. The specific choice depends on factors such as the actual bridge condition, reinforcement objectives, and budget. Regardless of the method chosen, construction specifications should be strictly adhered to ensure reinforcement quality and construction safety. During the construction process, special attention should be paid to material selection, surface treatment, and construction details to ensure the reinforcement effect meets expectations and extend the service life of Bailey bridges.
