Old bridge strengthen

Bridge Overview

The Xiabeiquan Bridge was built in 1968. It is 1733m long and 7m + 2 × 0.8m wide. It is a 10-hole 16.8m I-beam combined micro-bent plate. The foundation of the bridge is a bored grouting pile foundation, and the design load is steam 13 and suspension 60. Due to the long service life, according to the field investigation, the structure of the lower part of the bridge is basically intact, and no settlement has been found. However, the upper structure is severely damaged, and there are many longitudinal cracks in the I-beam, especially the side beams are severely cracked, all the expansion joints are damaged, and the bridge deck is not well drained, urgently need to be strengthened and improve the bearing capacity.

Reinforcement plan

Sticking carbon fiber wrap to make up for insufficient bending stress,

Planting rebars,

Epoxy resin injection,

Add cross beams to improve the integrity of the full bridge,

Recast concrete bridge deck pavement.

Project summary

1 Economic benefits

1) Reduced construction costs. In order to ensure the safety and smoothness of the road, if the Xiabeiquan Bridge is demolished and rebuilt, a construction fund of about 3.4 million yuan will be required. The use of carbon fiber reinforcement technology, because the carbon fiber sheet construction does not require any fixtures, templates and supports, the construction process is simple and rapid, although the price of carbon fiber itself is higher than other materials, but its construction cost is greatly reduced, significantly reducing investment. To a certain extent, it not only guarantees the smooth flow of roads, but also alleviates the shortage of funds.

2) Reduced maintenance costs. The use of carbon fiber reinforcement technology, because the material itself has good durability, at the same time its water resistance and ultraviolet resistance are good. Therefore, the carbon fiber reinforced concrete structure has very good corrosion resistance and durability, does not require any anti-corrosion treatment, is easy to maintain, and reduces maintenance costs.

2 Social benefits

Due to the simple and rapid construction of carbon fiber sheet repair and reinforcement, and the short construction period, Xiabeiquan Bridge took only one month. At the same time, the occupied space is small, so that the impact of the construction on the surroundings is minimized.

3 Environmental benefits

The use of carbon fiber reinforcement technology can eliminate the removal and disposal of waste components caused by the dismantling of structures. At the same time, it can also minimize the pollution of the surrounding environment by the construction, which has better environmental benefits.