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本文主要介绍后张法预应力桥面板在南水北调东线济平干渠工程施工中,监理工程师对预应力混凝土构件工程质量的控制方法。从理论上分析计算钢绞线在施工过程中的张拉操作及孔道灌浆时应注意的事项。详细讨论了预应力钢绞线张拉完成后,采用两种不同施工方法所产生不同的质量效果,即:⑴不切割预应力筋,不封猫直接灌浆,⑵按常规要求张拉完成后,先切割钢铰线余量,将钢铰线、猫具用高标号高稠度水泥浆封帽,待达到一定强度后再灌浆。
This paper introduces the post-tensioned prestressed bridge deck in the East Route of South-to-North Water Diversion Project construction, supervision engineers of prestressed concrete components engineering quality control methods. From the theoretical analysis of the calculation of the strand in the construction process of the tension operation and the hole grouting should pay attention to the matter. Discussed in detail after the prestressing strand tension is completed, the use of two different methods of construction have different quality effects, namely: ⑴ not cutting prestressed tendons, non-closure cat direct grouting, ⑵ according to the general requirements of the tension is completed, First cut the steel hinge margin, the steel hinges, cats with high-grade high-consistency cement grout cap, to be re-grouting after reaching a certain intensity.