What are the contents of bridge inspection? Why do you want to do bridge inspection?

1. Periodic inspection: including bridge deck system inspection, superstructure inspection and substructure inspection.

2. Regular structural inspection: including concrete strength inspection, concrete carbonation depth inspection, steel bar position inspection and concrete protective layer thickness inspection.

3. Detection of underwater components: Detection of concrete shedding, cracks, exposed tendons, cavities, mechanical damage and other diseases of underwater pile foundation, and video recording.

Four. Bearing capacity appraisal: it is judged whether the bearing capacity of the bridge can meet the design requirements at this stage through bearing capacity appraisal.

5. Long-term monitoring point arrangement and first observation: In order to observe the displacement of pier and main girder under the action of vehicles for a long time, and thus analyze the safety of the bridge, monitoring points are arranged at key parts of the bridge, and the monitoring points are observed for the first time.

With the development of highway bridges in China, there are more and more bridges. At the same time, many existing bridges are gradually entering the maintenance stage. Relevant experts believe that the bridge will enter the aging period after more than 25 years of use. According to statistics, 40% of the total number of bridges in China already belong to this category, all of which belong to "aging" bridges. And with the passage of time, its number is still growing, and bridge managers pay more and more attention to the maintenance of bridges. In order to meet the requirements of the continuous development of highway transportation load, make full use of the existing highway bridges and make them continue to serve highway transportation safely, it is necessary to identify the bridges according to the requirements of the Technical Specification for Highway Maintenance issued by the Ministry of Communications.