Comparison and Applicability Research of Prestressed Duct Pumpness Contemporary Major Nondestructive Detection Technology

[摘要] Prestressed reinforcement is one of the most hidden and important project in bridge enginerring. It directly determines the structure of the bending, shear, anti vibration, anti impact performance, it also has influence on the safety and durability of the structure. To evaluate old bridge structure, it is required to detect the internal reinforced distribution (quantity, specifications, protection layer thickness). In addtition, due to poor construction quality, position of prestressed tendons biased, and grouting can not get guarantee, which leads to serious corrosion of prestressing tendons, consequently in potential safety hazard. All above indicate that by using nondestructive method, it is significant to locate the prestressed tendon and define the quantative and distribution in structure. Then, it is required to evaluate the grouting condition of prestressed ducts, and regrouting for the flaw ducts. This paper focuses on several current famous prestressed grouting nondestructive detection methods, combining the characteristics of the actual bridge structure, and the accuracy of each method is obtained. Results is compared with applicability and pertinency. Research results provide method and basis for detecting subsequent prestressed bridge.

[发布机构] Research Institute of Highway, Ministry Transport, Beijing; 10088, China^1;Key Laboratory of Old Bridge Detection and Reinforcement Technology, Ministry of Transport, Beijing; 10088, China^2

[效力级别] 无线电电子学

[关键词] Construction quality;Nondestructive detection;Nondestructive detection method;Nondestructive methods;Potential safety hazards;Prestressed reinforcement;Prestressed tendons;Prestressing tendon