后张法预应力钢绞线伸长量的计算与测量控制

针对预应力钢绞线施工时，伸长值的计算以及现场控制的重要性，结合实际施工，总结出一套较适用于现场施工的伸长值计算方法与现场测量控制方法，以保证后张法预应力钢绞线的施工质量。

On calculation of extension length for steel strand with post-tensioned prestress and measurement control

Aiming at the importance of the calculating extension length and the site control in the process of the construction of the prestressed steel strand,the paper by combining with factual projects,sums up a series of the calculation methods for the extension length which is are suitable for the site construction and the methods of the site measurement control,so as to ensure the construction quality of the steel strand with post-tensioned prestress.