The current situation of concrete crash barrier walls on the city bridges of Harbin and the design concept of new fabricated protective plates

摘要

In the code area, crash barrier walls on city bridges suffer from severe exposure to concrete aggressive substances such as de-icing salts, freezing and thawing cyclic action and impact like action. Such elements often show insufficient durability when built using conventional reinforced concrete. First, this article conducts an on-the-spot investigation of the current situation of reinforced concrete crash barrier walls on Harbin city bridges, which are of different ages, and puts forward a design concept of fabricated protective plate based on rapid repair of concrete crash barrier walls on city bridges. It gives the design size of protective plates, the basic requirements of performance target design, material mixing and the implementation of the installation technology for the protective plates. The new protection method will provide references for the high speed retrofitting of reinforced concrete crash barrier walls for city bridges in this code area.