Construction Technology of Anti-Corrosion Coating for Main Tower of Shengli Yellow River Bridge
Corrosion of steel structure is a common disease,and anti-corrosion coating technology is the main measure of solving steel bridge corrosion.The construction technology and process has a great impact on the coating quality because the anti-corrosion coating of steel bridge is work at height.The main pylon of the Shengli Yellow River Bridge is a H-shaped tower,with the total height of 69.6 m.The cross section of the bridge tower is composed of steel structure on the outside,and reinforced concrete filled inside.Cables are only anchored on the upper part of the tower,while the middle and the lower part is cable-free.As the bridge has been in operation for a long time,it is affected by the surrounding environment,and the surface of the main tower is seriously corroded,which affects the durability and appearance of the bridge tower.Therefore,the bridge tower needs to be retreated with anti-corrosion measures.In order to ensure the construction quality of the anti-corrosion painting procedure for the bridge tower and to improve the safety during construction,the key technology of the anticorrosive painting procedure is systematically summarized in this paper based on the anticorrosive painting project for the main tower of the Dongying Shengli Yellow River Bridge.The structural characteristics of the bridge tower and the geographical environment under study are comprehensively considered.Meanwhile,a closed painting construction platform is designed to reduce the negative effects of bad weather on construction.The technical points and precautions of the anti-corrosion coating for bridge tower are also put forward.The results of this paper can provide reference for similar projects.
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