Starting from the analysis mechanism of corrosion types in bridge engineering, this paper briefly analyzes the corrosion mechanism and reasons in bridge engineering, and emphatically expounds the treatment measures of corrosion problems in bridge engineering, so as to provide valuable reference suggestions for relevant engineering quality management departments.
Keywords: bridge engineering; Corrosion; Problems; Reason; Countermeasures
Introduction to 0
With the development of economy and the progress of society, the bridge engineering projects in China also show a trend of rapid development. However, there are still serious corrosion problems to be solved in the actual operation of the project, and relevant researchers need to establish specific control measures and more perfect control mechanisms for specific problems. At the same time, in the process of bridge engineering project supervision, relevant technologies should effectively pay attention to the corrosion problem and build a more perfect engineering project supervision mechanism to improve the project management effect.
1 analysis of corrosion types of bridge engineering
In the process of studying engineering projects, the types of bridge corrosion should be analyzed first, because the corrosion process mainly refers to the physical or chemical changes of materials in environmental media, which will not only affect the overall technical system, but also damage the performance of the overall engineering project. Among the actual corrosion problems, the key problems mainly include bridge chemical corrosion, bridge physical corrosion and bridge electrochemical corrosion. In engineering projects, the corrosion problems of bridges are mainly steel bar corrosion and concrete corrosion, which will have a serious impact on the whole project, and even lead to a serious threat to the safe operation of the whole project [1].
2. Corrosion mechanism and cause analysis in bridge engineering.
(1) Corrosion mechanism in bridge engineering There are corrosion problems in bridges, and chemical corrosion and electrochemical corrosion are the main influencing factors. In chemical corrosion, oxidation reaction and reduction reaction will occur in bridges, and the basic principle is ion exchange. In the process of electrochemical corrosion, the oxidation reaction and reduction reaction are relatively independent, and some changes occur under the action of anode and cathode, resulting in cracks in the overall structure of the bridge; (2) Cause analysis in bridge engineering After analyzing the causes of cracks, comprehensive analysis and control are mainly carried out from the aspects of material selection, construction structure and maintenance mechanism, so as to ensure that practical problems can be effectively solved and the integrity of the overall operation and control mechanism can be realized. First, the corrosion problem of steel structure is serious. Mainly in the steel structure of bridge engineering, there will be serious problems. The reason is mainly due to the interaction between air and water and the influence of different natural factors, which will lead to cracks in the overall structure. Especially in some heavily polluted areas, the environment contains a lot of carbon dioxide and sulfur dioxide, which will also lead to serious corrosion cracks on bridges. Among many influencing factors, atmospheric water content, precipitation, dust and light will affect the actual quality of the bridge, and even lead to a very serious impact on the structure and status of the whole system. Secondly, reinforced concrete itself has cement, and its hydration will produce CaO. When this substance comes into contact with the steel bar, it will produce FeO chemical membrane structure outside the steel bar, which will play a protective role, but this protective effect will be destroyed after it comes into contact with external acidic substances, and the actual protective effect will also be weakened; Secondly, concrete has serious corrosion problems. Because concrete itself is a complex composite product, dicalcium silicate and tricalcium silicate are the key elements in its actual composition, and its corrosion reaction is mainly due to carbonation decomposition and serious corrosion of chloride ions, which are the reasons for the problems. It is particularly important to note that in the process of concrete carbonization, it is based on its own alkaline environment that if acidic substances appear, they will react with the original substances, resulting in the destruction of the balance. In the process of crack cause analysis, acidification corrosion should also be treated centrally, which mainly refers to waste gas, waste water, acid rain and acidic substances. Because they all react with concrete materials, insoluble substances will be generated after the reaction, and serious cracks will occur after the concrete structure is destroyed.
3 Remedial measures for corrosion problems in bridge engineering
For specific problems, relevant researchers should establish and improve a complete set of control and treatment mechanisms to ensure that the bridge corrosion problem can be effectively solved, especially for adverse weather conditions, to ensure that the corrosion problem of steel structure bridges can be optimally controlled. First, we must effectively control and control environmental pollution. It is necessary to improve the effectiveness of the overall control mechanism from the organizational form and the basic quality of managers to ensure that the management behavior and scientific research control results can establish an effective' balance' [2]; Second, managers should optimize the handling of practical problems, effectively isolate the intrusion of pollution problems, and concentrate on selecting corrosion-resistant materials when the project is approved; Third, we should concentrate on selecting more advanced manufacturing technology, improve the overall operation technology of bridge projects, and promote the optimal development of management structure and management effect; Fourthly, after the analysis and treatment of bridge cracks, relevant management departments should combine the actual situation, use effective technical framework, establish dynamic control mechanism and engineering optimization measures, and fundamentally implement the most economical and effective practical scheme, so as to improve the effectiveness of the overall crack treatment problem.
4 conclusion
In short, for bridge engineering, the relevant construction units should establish an optimized engineering treatment mechanism, strengthen the treatment level of cracks, ensure the simultaneous optimization of technical level and manual management level, and improve the actual quality of the project to a certain extent. Only by strengthening the measures and effects of solving problems and ensuring the integrity of the overall project management and control framework can we lay a solid foundation for the sustainable development of bridge projects in China.
refer to
Jianxin Peng, Shao Xudong. CO2 emission, climate change and its influence on initial corrosion time and time-varying reliability evaluation of concrete structures [J]. Highway Traffic Science and Technology, 2014,26 (10): 76-8186.
Shi Jianguang, Yu Zhiyong, Lin Tingning, et al. Corrosion environment assessment and durability design requirements of coastal concrete bridge engineering [J]. Concrete, 20 13,15 (12): 67-71.
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