Box Girder formwork

Shaanxi Flourish Industrial Co., Ltd.'s Steel Box Girder Formwork revolutionizes long - span bridge construction with its unrivaled "precision - integrated" solution. Engineered specifically for box girders, it addresses the pain points of inaccurate forming and inefficient construction in traditional methods. Made from high - strength Q355ND steel, it offers industry - leading precision and durability, setting a new standard for box girder formwork.

1. Ultra - High Precision Integral Forming

Proprietary "one - piece casting" technology enables seamless integral forming of box girder top, bottom, and flanges. This eliminates the joint gaps and misalignments common in traditional segmented formworks. The result is a linear precision of ±1mm, which is crucial for maintaining the structural integrity and aesthetic appeal of 20 - 100m span bridges. In contrast, conventional formworks may have linear errors of up to ±5mm, affecting the load - bearing capacity and long - term stability of the bridge.

2. Exceptional Load - Bearing Capacity

Features a "multi - layer composite rib" structure with main ribs 16mm thick and auxiliary ribs 10mm thick. This design provides a load - bearing capacity of 90kN/m², 30% higher than standard formworks. It can withstand the heavy concrete pouring pressure during box girder construction, ensuring stable formwork performance even under extreme loads. For example, in the construction of a 50m - span bridge with a large - volume box girder, our formwork maintained its shape without deformation, while other formworks on the market showed visible deflections.

3. Versatile Modular Design

The modular segments are designed to fit both single - cell and double - cell girders. With an adjustable connection system, the formwork can be easily assembled and disassembled to adapt to different box girder structures. This flexibility reduces the need for custom - made formworks for each project, saving time and cost. For instance, in a project with a mix of single - cell and double - cell box girders, our formwork could be quickly reconfigured on - site, while traditional formworks would require separate fabrication for each type.

4. Long - Term Durability and Cost - Efficiency

Utilizes an 85μm hot - dip galvanizing process followed by a 15μm epoxy coating, providing excellent corrosion resistance. This ensures a service life of over 300 reuses, which is 50% longer than ordinary steel formworks. The long - term durability significantly reduces the overall cost of formwork procurement and replacement over the lifespan of a bridge project. In a long - term bridge maintenance project, the formwork's corrosion - free performance saved the client substantial costs on formwork replacements.

1. Material

Steel Grade: Q355ND, known for its high strength and good weldability. It has a yield strength of 355MPa, tensile strength of 470 - 630MPa, and elongation of ≥21%, making it ideal for withstanding the mechanical stresses in box girder construction.

2. Load - Bearing Performance

Maximum Load - Bearing Capacity: 90kN/m², suitable for pouring high - strength concrete such as C50 - C80.

Deflection Limit: Under full - load conditions, the deflection of the formwork is controlled within 1/1000 of the span, ensuring the dimensional accuracy of the box girder.

3. Modular Dimensions

Standard modular segment sizes are available in 2m × 3m, 3m × 3m, and 4m × 3m, with customizable options to meet specific project requirements. The modular segments are designed for easy handling and transportation, with each segment weighing between 1 - 3 tons, depending on the size.

4. Surface Treatment

Hot - dip galvanizing thickness: 85μm, providing a robust anti - corrosion base.

Epoxy coating thickness: 15μm, further enhancing corrosion resistance and providing a smooth surface finish for easy concrete release.

Installation Steps

Step 1: Prepare the construction site and level the foundation.

Step 2: Assemble the modular segments according to the design plan, using high - strength bolts and locking devices.

Step 3: Install the support system, ensuring proper alignment and stability.

Step 4: Check the overall assembly for accuracy and make necessary adjustments.

Step 5: Apply a release agent to the formwork surface to facilitate concrete release.

Maintenance Tips

Regularly inspect the formwork for any signs of damage, such as cracks, dents, or corrosion.

Clean the formwork after each use to remove concrete residues.

Lubricate the connection parts to ensure smooth disassembly and assembly.

Periodically check the integrity of the surface treatment and touch up any damaged areas.

1. Can the formwork be customized for non - standard box girder designs?

Yes, our formwork can be customized. Our engineering team can work with you to design and fabricate modular segments that meet the specific requirements of your non - standard box girder design.

2. What is the warranty period for the formwork?

We offer a 2 - year warranty on the formwork. During this period, we will provide free replacement or repair services for any quality - related issues.

3. Do you provide on - site installation guidance?

Yes, we have a professional technical team that can provide on - site installation guidance to ensure the correct installation and operation of the formwork.

Choose Shaanxi Flourish's Steel Box Girder Formwork for precise, efficient, and durable box girder construction. Our product is your key to building long - span bridges that stand the test of time.