Analysis And Treatment Policy On The Cracks Of Concrete Bridge Beam Structures

With China's rapid development of bridge construction, the bridge structure form is large and complicated, the quality requirements, the bridge structure strictly in the design, construction and theoretical research of concrete bridge structure, the crack problem will gradually become an important research topic. But because of the influence of regional climate by load, and gradually complicated, with the structure of the system and make theoretical universal has the certain difficulty.According to concrete bridge structure in the different climatic conditions and different load and different structural cracks in the investigation and analysis of deformation theory, using the mature, load of elastic mechanics theory and knowledge based on practice of bridge crack were studied. The system can be universally applicable, analysis and control methods of cracking of concrete bridge structure. Also in the practical problems in engineering of repair cracks in concrete bridge structure to implement solutions, and analyzed the characteristics and the various solutions suitable conditions. In detail from the aspects of theory discussed the causes of cracks of concrete bridge construction control method and design, construction, and puts forward some corresponding aspects of prevention and treatment measures. Through the different methods of processing and prolong the service life of the bridge, and improve the bearing capacity of the bridge.Firstly, qualitative analysis of crack in concrete bridge structure, shrinkage reason analysis theory, Then discusses the theoretical analysis and calculation with deformation cracks of concrete bridge structure, And using new craft, new material for the cracks of the concrete bridge structure repair methods, Through the hangzhou bay sea-crossing bridge project construction of prestressed concrete box girder 70m fracture analysis and control measures of example has further expounded, the point of this article: in design by reasonable design of structure, size, and the reasonable selection of vertical prestressed concrete design, reasonable decorate tectonic stress components and suitable temperature control of steel, And when the construction of material (such as water-cement ratio, temperature, water content, etc.), construction technology for precise control; etc. By late mend method, integrated sealed pressure grouting method, paste repair method (FRP plates or material), strengthening measures can effectively control of concrete bridge structure crack.