Concrete Cracks Of Bridge In The Conservation And Life Prediction

In recent years, our country bridge construction has achieved rapid development. Afterthe completion of the bridge, for the sake of the normal operation of the bridge, extendingtheir life as possible, it must be scientific, regular maintenance and management.For this reason, the centre of this thesis is the conservation of the cross-sea bridge ofreinforced concrete cracks and life prediction, the main research contents are as follows:1. on the type and mechanism of cross-sea bridge of reinforced concrete cracks.according to the causes of cracks in concrete, it mainly has three aspects:(a) The concretecracks caused by the deformation;(b) concrete cracks caused by the physical and chemicalreaction;(c) concrete cracks caused by external forces.2. Research on the marine environment influencing cross-sea bridge concrete cracks,Focus on content is that corrosion of steel bar caused by Chloride diffusion. Through theabove research and analysis, it is concluded that the bridge concrete micro-cracks is inevitable.For concrete bridge crack further expanding the external factors is mainly the external forces,the internal factors is corrosion expansion, This paper on crack for conservation in two ways,on the one hand is based on crack repairing of conservation measures, on the other hand isbased on conservation measures for crack control.3. Papers improved concrete life prediction model, refinement of chloride concentrationin concrete surfaces in the model parameters, through case study, show that the improvedresults of the analysis of the model is more realistic, for the timely adoption of conservationmeasures, it play an important role.