The basic principle of bridge reinforcement

Because of structural failure or damage, when it can not meet the requirements of structural safety or normal use, the bridge structure must be strengthened.6) The reinforcement design should be closely combined with the construction method, and take effective measures to ensure that the new and old structures are connected reliably and can work together.

The basic principle of bridge reinforcement



1) Because of structural failure or damage, when it can not meet the requirements of structural safety or normal use, the bridge structure must be strengthened. The content and scope of reinforcement design should be determined according to the conclusion of evaluation and the requirements of the client, which can include the whole bridge, or the designated section or specific component.


2) Establish an economic analysis model for existing bridge repair, reinforcement and retrofitting. Through analysis and comparison, we choose a feasible technology, economic rationality and less interference to the existing traffic, so as to ensure the safe operation of the transformed bridge.


3) Rebuild the bridge's evaluation conclusion and economic analysis according to the need. When we know that the existing bridge can reach the requirement of service through reinforcement and repair, we propose the design plan of bridge reinforcement.


4) For a bridge or a super large bridge, if the main load-bearing members need to be reinforced, there should be no less than two reinforcement schemes, so as to make comparison and economic evaluation of the bridge and choose the best reinforcement plan.


5) The reinforcement design and construction should not damage the original structure as far as possible, and retain the useful components to avoid unnecessary dismantling or replacement.


6) The reinforcement design should be closely combined with the construction method, and take effective measures to ensure that the new and old structures are connected reliably and can work together.


7) The reinforcement design should be calculated according to the actual damage of the structure.


8) In the reinforcement construction, we should minimize the interference of vehicles and pedestrians on the bridge and under the bridge. We should take necessary measures to reduce the pollution to the surrounding environment.


9) In the process of consolidation and construction, if there are serious structural defects in the original structure or hidden parts of the relevant works, the construction shall be stopped immediately, together with the design personnel of the reinforcement scheme, and after the modification and reinforcement plan is continued, the construction can continue.


10) In the reinforcement construction, safety monitoring measures should be taken to ensure the safety of personnel and structure.


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