The reasons of poor bridge 

1.The specification is not perfect

2.There is not enough sense of responsibility for the design and construction of the project 

3.Supervision is not in place

4.Management and maintenance are not in place

Main problems in existing bridges

1.Lack of signs, signs, management out of control

Overloading, fire

2.The bridge surface waterproof and drainage failure

Affecting normal and safe driving, resulting in structural safety hazards

3.Paving, baluster damaged and incomplete

Impact on driving, pedestrian safety and vehicle impact to increase structural load

4.The bearing has poor safety accuracy, telescopic device, bearing failure and failure

Change the stress mode of bridge structure, endangers the stability of the structure and the safety of the force

5.The bridge structure is cracked and damaged

Structural strength decreases, endangering the safety of structural carrying capacity

6.The strength, stability and stiffness of the bridge do not meet the requirements

Endangering the safety of structure use

7.The concrete bridge accelerates downward

The precursor of bridge destruction! It is necessary to assess and judge in time!

8.Bridge foundation scour

Jeopardize the safety of the bridge!

9.Bridge fire

10.The ship crashed and collapsed

11.Overloading led to collapse

12.Big flood

13.Earthquake

14.Bridge steel structure defects, corrosion, fatigue and so on, leading to collapse

15.Poor quality

Materials of bridge structural strengthening 

Carbon fiber fabric

CFRP strip

Prestressed FRP laminate

Anchoring adhesive

Steel plate adhesive

Perfusion steel plate adhesive

Crack repair adhesive

Crack injection adhesive