Abstract: Base on the construction practice of post-tension prestressed concrete, the common method of grouting can not make the grout mass that can be got by vacuum grouting. The vacuum grouting method is continuously used in post-tension prestressed concrete in recent years and this paper introduce the new construction technology of vacuum grouting according to the construction experience of Rongqiao bridge in the Chongqing city.

Key words: vacuum grouting, plastic pipe, curve, prestressing

摘要： 根据目前工程实践来看,后张法预应力砼构件采用普通方法灌浆,很难达到灌浆密实、浆体饱满的效果,而采用真空灌浆技术则可有效提高灌浆质量.使浆体饱满密实,更好地保护钢筋免遭锈蚀,从而提高预应力构件的耐久性.真空灌浆技术是后张法预应力砼结构施工中的一项新技术,近年来在国内外工程施工中不断得到应用,并取得良好效果.本文根据重庆融桥大道螺旋桥的施工情况,介绍了真空灌浆技术及施工工艺.

关键词: 真空灌浆, 塑料波纹管, 空间曲线, 预应力