Reinforcement of Gulou Overpass

Problems in this project:

> There are many and wide cracks

Part of the bridge prestressed continuous box girder has a large number of transverse cracks in the mid-span area, the maximum crack width is 0.8mm (generally, the control standard for the maximum crack width of concrete structural members is 0.3mm), and most of them are caused by prestress loss.

> Difficulty in construction

The inability to enter the bridge box for construction has caused great difficulty in the selection and construction of the reinforcement and reconstruction of the Gulou overpass.

> Traffic should not be closed

This bridge is one of the main traffic roads in the area, and long-term traffic closure will affect the life, travel, and tourism of the area.

After integrating various options, the construction party finally chose the Horse prestressed carbon fiber plate reinforcement system.

Technical advantages of prestressed carbon fiber plate reinforcement system:

1. Reinforce outside the body to solve pain points.

The external prestressing method is active reinforcement, which can realize the redistribution of the internal stress of the beam, and is an effective method for improving the crack resistance of the bridge structure. It can be reinforced without entering the inside of the box, which perfectly solves this pain point.

2. Active reinforcement, the effect is remarkable.

Prestressed carbon plate reinforcement is an active reinforcement technology, which combines the high strength of carbon plates and the characteristics of prestressing, and has high strength utilization of carbon fiber plates. It can significantly increase the strength and rigidity of the structure while reducing the deflection deformation of the reinforced concrete structure. And can reduce and close the cracks. It has the advantages of light weight, little damage to the structure, simple construction, and good reinforcement effect.

3. Construction can be carried out without unloading or blocking traffic. The construction is simple and efficient, and the construction period is shorter than traditional reinforcement methods.

Technical advantages of Horse prestressed carbon fiber plate reinforcement system:

1. The anchoring performance is reliable, and the anchorage efficiency coefficient can reach 96%.

The prestressed carbon fiber plate anchorage is based on the friction anchorage principle to anchor the carbon fiber plate, so the efficiency of the anchorage directly affects the reinforcement effect.

2. Strong anti-fatigue performance, passed 2 million fatigue load tests.

3. The prestressed carbon fiber plate reinforcement system has been identified as an "international advanced" product due to its good reinforcement effect, and the product quality has been recognized by the industry, which is a strong proof of our superior product development and innovation capabilities.