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Thickness of reinforcement cover is an important index to measure the durability of structure. It is difficult to measure the thickness of steel bar protective layer and to control the quality of steel bar protective layer. From design, construction and testing evaluation,this paper puts forward the deviation of the definition of the thickness of steel bar protective layer, and analyzes the factors affecting the fabrication,installation and testing standards.The design optimization, construction control and quality evaluation criteria based on mathematical statistics method are put forward. Through a series ofmeasurementsto improve the thickness index of bridge reinforcement protection layer, a scientific and complete evaluation system is established, and the quality acceptance criteria and detection methods are unified.It has a certain guiding role in construction selfinspection and project acceptance.

Analysis of unqualified factors and evaluation methods of Thickness of reinforcement cover