The dealer of bridge bearing manufacturer will show you the basic principles of bridge reinforcement and maintenance

The dealer of bridge bearing manufacturer will show you the basic principles of bridge reinforcement and maintenance

Bridge reinforcement generally refers to restoring or improving the bearing capacity of existing bridges by strengthening members and improving structural performance, so as to extend their service life and meet the requirements of modern transportation.

Basic principles of bridge reinforcement and maintenance:

1) When the bridge structure cannot meet the requirements of structural safety or normal use due to structural failure or damage, it shall be reinforced. The content and scope of the reinforcement design shall be determined according to the evaluation conclusion and the requirements proposed by the entrusting party, which may include the whole bridge, the designated section or the specific components.

2) Establish an economic analysis model for the maintenance and reinforcement of existing bridges. Through analysis and comparison, the scheme that is technically feasible, economically reasonable and with little interference to existing traffic is selected to ensure the safe operation of the reconstructed bridge.

3) According to the evaluation conclusion and the economic analysis of the bridge to be rebuilt, the design scheme of bridge reinforcement is proposed after understanding that the existing bridge can meet the use requirements through reinforcement and maintenance.

4) For bridges and super-large bridges, when the main load-bearing components need to be reinforced, there should be at least two reinforcement design schemes for comparison and economic evaluation of schemes and selection of reinforcement schemes.

5) The reinforcement design and construction should try not to destroy the original structure, retain useful components and avoid unnecessary removal or replacement.

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

7) The reinforcement design shall be calculated according to the actual failure of the structure.

8) During the reinforcement construction, the interference of vehicles and pedestrians passing on and under the bridge should be minimized, and necessary measures should be taken to reduce the pollution to the surrounding environment.

9) During the reinforcement construction, if serious structural defects are found in the concealed parts of the original structure or related works, the construction shall be stopped immediately and the reinforcement scheme designer shall study. After the reinforcement scheme is modified, the construction can continue.

10) During reinforcement construction, safety monitoring measures shall be taken to ensure the safety of personnel and structures.

Requirements for bridge reinforcement and maintenance:

1) The technical transformation and reinforcement of bridges are usually required to be carried out without interruption or as little as possible interruption of traffic. The construction process is required to be simple, the construction speed is fast, the construction period is short, and the traffic congestion is minimized.

2) The construction site is narrow and crowded, which is often restricted by the original structure, so the process should be reasonably arranged.

3) The reinforcement construction often has adverse effects on the original structure and adjacent structural components. The damage to the original structure should be minimized, and the components with no use value should be scrapped and removed.

4) The demolition and cleaning of the original structure is heavy, the project is complicated and fragmented, and there are many unsafe factors. The construction personnel are required to pay attention to the operation safety and strengthen the construction quality and management.

5) The balance between the strength, stiffness and service life of the new and old structures should be fully considered in the technical transformation and reinforcement plan to ensure that the new and old structures work together, so that the strengthened structure can achieve the purpose of safety, reliability and durability.