后张法预应力张拉伸长值的计算及量测  

Calculation and Measurement of Elongation Value of Post-tensioning Prestressing

作　　者：石健 Shi Jian

机构地区：[1]彭水县职业教育中心,重庆409699

出　　处：《建筑技术开发》2021年第18期44-45,共2页Building Technology Development

摘　　要：预应力钢绞线施工过程中采取张拉应力和伸长值同时进行控制,严格按照规定的要求来控制张拉应力,用伸长值的方式校验核实,施工过程中实际伸长值和理论伸长值误差不大于1%,计算和测量伸长值相当重要。根据某项目渡槽的23 m T梁的张拉施工过程,对后张法预应力施工中伸长值计算和量测方法进行详细介绍。The tensile stress and elongation value are simultaneously controlled during construction of prestressed steel strand,and tensile stress is controlled in strict accordance with specified requirements,and elongation value is used to verify that error between practical elongation value and theoretical one during construction process is controlled within 1%.It is very important to calculate and measure elongation value.According to tensioning construction process of 23m T-beam of aqueduct of a certain project,elongation calculation and measurement methods in post-tensioning prestressing construction are introduced in detail.

关 键 词：预应力钢绞线 伸长值 T梁 

分 类 号：U445.57[建筑科学—桥梁与隧道工程]