基于双电极电位的桥梁内部配筋锈蚀度瞬变电磁成像无损量化检测试验

发布时间：2018-01-06 09:30

本文关键词：基于双电极电位的桥梁内部配筋锈蚀度瞬变电磁成像无损量化检测试验　出处：《重庆交通大学》2013年硕士论文　论文类型：学位论文

【摘要】：在役混凝土桥梁结构内部配筋错综复杂，其内部钢筋的位置、钢筋的直径、钢筋的走向以及保护层厚度均未知，无损探测内部钢筋的锈蚀情况问题是亟待解决而没有很好解决的世界性难题。针对上述背景，本论文提出基于双电极电位的桥梁内部配筋锈蚀度瞬变电磁成像无损量化检测技术。论文首先通过广泛调查获得桥梁内部钢筋锈蚀的类型、影响腐蚀的因素，得到混凝土钢筋锈蚀的特点和规律，总结其锈蚀形态。在此基础上，分析钢筋锈蚀的机理并对比开裂状态下钢筋锈蚀检测的化学方法、物理方法和未开裂状态下的锈蚀检测方法。由此提出能够准确判断钢筋锈蚀程度和锈蚀速率并得到其量化指标的无损检测新方法——基于双电极电位的桥梁内部配筋锈蚀度瞬变电磁成像无损量化检测法。运用此方法，不仅可对钢筋锈蚀进行定性检测，而且可以通过捕捉锈蚀目标确定锈蚀大小和位置，，确定锈蚀量，达到定量检测的目的。最后，通过实验室设计并试验一个接近实际的基于双电极电位法的内部钢筋锈蚀无损检测，通过对比不同水灰比、不同保护层厚度、不同钢筋直径及不同混凝土表面几种因素下的电位梯度得到内部钢筋锈蚀的基本特征。以此验证该方法的可行性与实用性。本文提出基于双电极电位的桥梁内部配筋锈蚀度瞬变电磁成像无损检测技术，可以充分结合双电极电位法和瞬变电磁成像技术两者的技术优势，解决现场检测桥梁内部钢筋锈蚀只能进行定性检测、不能定量检测的世界性难题。此方法具有广阔的市场前景和应用价值，将产生巨大的经济效益和社会效益。
[Abstract]:In the internal structure of existing concrete bridge reinforcement of reinforced the position of its internal perplexing, and the diameter of the steel bar, the trend and the thickness of the protective layer are unknown, nondestructive detection of internal corrosion of steel is to be solved and unsolved difficult problem in the world. In view of the above background, this thesis proposes electromagnetic nondestructive quantitative detection technology of bridge double electrode potential internal reinforcement corrosion degree based on instantaneous.
Firstly, through extensive investigation, we get the types of steel corrosion, influence factors of corrosion, get the characteristics and rules of reinforced concrete corrosion, and summarize the corrosion forms.
Based on the analysis of the mechanism of rebar corrosion and chemical corrosion detection method comparison of cracking condition, physical method and non cracking corrosion detection methods. The state can accurately judge the corrosion degree and the corrosion rate and the quantitative index of new nondestructive testing method based on double bridge with internal electrode potential reinforcement corrosion degree of transient electromagnetic Imaging Nondestructive Quantitative detection method. Using this method, not only for the qualitative detection of steel corrosion, and corrosion corrosion by capturing target size and location, determine the amount of corrosion, to achieve quantitative detection.
Finally, through laboratory test and design a close to the actual internal corrosion potential by double electrode based on nondestructive testing, through the comparison of different water cement ratio, different thickness of the protective layer, the potential gradient of different diameter and different reinforced concrete surface of several factors under the basic characteristics of internal corrosion of steel bars in order to verify the feasibility and practicability. The method.
This electromagnetic nondestructive testing technology of bridge double electrode potential internal reinforcement corrosion degree based on instantaneous, can combine advantages of double electrode method and transient electromagnetic imaging technology both, solve the field test of bridge steel bar corrosion only for qualitative detection, a worldwide problem in quantitative detection. This method has broad market prospect and application value, will produce enormous economic benefits and social benefits.

【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：U446

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