后张法预应力梁孔道压浆施工质量控制要点探讨

Research on key points of post-tensioned prestressed beam hole grouting construction quality control

后张预应力孔道压浆的目的主要是防止预应力筋锈蚀和均匀传递应力,压浆质量的好坏对预制混凝土构件的使用安全和耐久性均有重要影响。采用常规压力灌浆施工工艺或真空辅助压浆技术,均须对浆体材料和施工过程进行严格控制才能保证压浆质量。文中对后张法预应力梁孔道压浆施工工艺特点和质量控制要点进行分析阐述,并对常见质量问题的检查和补救方法提出相关建议。

Post-tensioning method prestressing force duct grouting to protect the prestressing force reinforced bar and well-distributed stress transfer, duet grouting the quality stand or fall of precast concrete usage safety and durability have important influence.Put to use the conventional grouting construction technology or the vacuum grouting technique ensure grouting quality must be strict control over to slurry mixing materials and construction process. In the text to post-tensioning method prestressing force for beam the duct grouting construction technology characteristic and construction quality control the important points to discuss, and suggest for check method and repair method of common problem.