CAJ | 학술논문

南水北调中线工程跨渠桥梁建设中，后张预应力混凝土梁使用普通压浆方法，管道压浆后出现空隙、不密实的问题，直接影响到桥梁运行安全，因此需要采用真空压浆技术以保证压浆质量。介绍了真空压浆技术的原理、施工工艺、压浆施工步骤和施工注意事项。工程实际表明，采用真空压浆技术可以减少浆体孔隙泌水现象、保持浆体稳压并充满整条管道、消除裂缝并保证浆体充盈度、缩短压浆时间，能够提高跨渠桥梁后张预应力混凝土梁的可靠性和耐久性。
남수북조중선공정과거교량건설중，후장예응력혼응토량사용보통압장방법，관도압장후출현공극、불밀실적문제，직접영향도교량운행안전，인차수요채용진공압장기술이보증압장질량。개소료진공압장기술적원리、시공공예、압장시공보취화시공주의사항。공정실제표명，채용진공압장기술가이감소장체공극비수현상、보지장체은압병충만정조관도、소제렬봉병보증장체충영도、축단압장시간，능구제고과거교량후장예응력혼응토량적가고성화내구성。
In construction of the cross-canal bridges in South to North Water Diversion project, the common grouting was used for post-tensioned prestressed concrete beam. After the grouting, the safety of the bridge was influenced by the problems such as void and insufficient density. So, the vacuum grouting technology was adopted to ensure grouting quality. The principle, construction technology, steps and points for attention in vacuum grouting were introduced. The practice showed that the vacuum grouting could reduce bleeding, maintain the pressure of the slurry and ensure slurry fullness in the pipeline, avoid the cracks and shorten the grouting time and the reliability and durability of post-tensioned prestressed concrete beam could be improved.