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针对日照沿海桥梁的耐久性现状进行调研,通过对桥梁墩身、边梁和栏杆混凝土的保护层厚度、碳化深度以及桥梁不同部位的游离氯离子浓度的检测表明:桥梁混凝土结构保护层厚度偏小、车辆超载、结构设计不合理、施工管理不当、缺乏维护管理是导致沿海桥梁混凝土结构损伤劣化的主要原因。此外,海洋环境中的氯离子和空气中的二氧化碳将导致桥梁混凝土中钢筋腐蚀,海水中的盐在混凝土中结晶将导致桥梁墩身腐蚀破坏。
Based on the survey of the durability of the bridge along the coast of Rizhao, the protective layer thickness, depth of carbonation and free chlorine ion concentration in different parts of the bridge pier body, side beam and balustrade show that the thickness of the protective layer of bridge concrete structure is small , Vehicle overloading, unreasonable structural design, improper construction management, and lack of maintenance and management are the main reasons leading to the deterioration of the concrete structure of coastal bridges. In addition, the chloride ion in the marine environment and the carbon dioxide in the air will lead to the corrosion of the steel in the bridge concrete. The salt in the seawater will cause the corrosion in the pier body of the bridge.