浅谈预应力筋的伸长与校核  

Elongation and Checking of Prestressed Reinforcing Steel

作　　者：张小玉 

机构地区：[1]贵州省质安交通工程监控检测中心有限责任公司,贵州贵阳550000

出　　处：《山西科技》2009年第5期129-130,共2页Shanxi Science and Technology

摘　　要：钢绞线预应力混凝土在桥梁工程中已普遍使用,作为质量双控指标的钢绞线张拉伸长值及锚固张拉力的计算,相应规范均已有明确规定,但在实际施工中,对预应力张拉的具体量测却存在较大差异。文章就此问题通过深圳地铁3#线高架桥施工的实践予以介绍。The strand prestressed concrete is widely used in bridge construction, and as indexes of double quality control, the elongation value of strands and the computation of the tensioning force of anchors have been specified in corresponding standards. But in actual construction, the measurement of prestressed tension varies greatly, which is expounded with the construction of the No.3 viaduct of Shenzhen subway.

关 键 词：后张法 预应力筋伸长值 锚固回缩值 计算与校核 

分 类 号：TU378.1[建筑科学—结构工程]