波紋涵管 熱鍍鋅涵管 衡水力能涵管 新館 管子 大管子 波紋涵管

accuracy of various detection methods, the engineering community has always expected a stable and efficient detection method, so that non-destructive testing technology can play a greater role in bridge testing. In view of this situation, the author first analyzes the existing problems and causes of corrugated pipe grouting, and puts forward a method to reduce the defects of corrugated pipe construction. Finally, combining with a high speed project in Chengde and using the most advanced I-E S detection technology at home and abroad, the feasibility of this technology for prestressed corrugated tube grouting defect detection is analyzed. Investigation of defects and causes If the corrugated tube is not compacted, the steel winch will be corroded, and the prestress will be lost in advance, which will shorten the bridge life. The formation defect of corrugated pipe is mainly that the cement slurry is not filled with the entire corrugated pipe, resulting in a large crescent-shaped gap at the top of the corrugated tube, and even a phenomenon of dew. Another phenomenon is that the strength of the slurry is not enough to make the slurry, steel winch, and concrete beam form a unified whole. The main reasons for this quality defect are: 1. The improper selection of cement slurry and additive resulted in a large ratio of cement ash.