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Methods of strengthening existing highway bridges

Due to the increase of traffic flow and the increase of load, bridges are suffering from various diseases and need to be reinforced urgently.


Methods of strengthening existing highway bridges.jpg


Due to the increase of traffic flow and the increase of load, bridges are suffering from various diseases and need to be reinforced urgently.


Reinforcement method

Steel plate bondedCFRP strengtheningIn vitro prestressed reinforcement of steel strandPre-stressed CFRP laminate

Influence on the original structure

Increasing the original structure weight and size, may damage the original structural steel bar.

Basically, it will not increase the original structure weight and size, and will not damage the original structure.Increasing the original structure weight and size, may damage the original structural steel bar.Increasing the original structure weight and size, may damage the original structural steel bar.

Reducing the deformation of the component or closing the crack

The deformation of the original structure can not be reduced and the cracks can not be closed.The deformation of the original structure can not be reduced and the cracks can not be closed.It can reduce the deformation of the original structure and seal the cracksIt can reduce the original structural deformation and reduce or seal cracks.

Construction conditions

Mechanical assistance is required and is not suitable for curved corner reinforcementConstruction is convenientConstruction is convenientConstruction is convenient

Construction period

ShortShortLongShort

The labor

ManyLessManyLess

Construction quality control

It is not easy to find reinforcement defects, and finding problems is not easy to remedy.

It is easy to find reinforcement defects and find problems easy to remedy.


It is easy to find reinforcement defects and find problems easy to remedy.

It is easy to find reinforcement defects and find problems easy to remedy.

Maintenance

Anticorrosion treatment on a regular basis

Periodic inspection

Periodic inspection

Less maintainance


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