700t客专预制箱梁张拉施工控制技术综述

A survey on the control technology of stretch-drawing prefabrication of box girders for 700-t passenger special line summary

结合成绵乐客运专线700 t预制箱梁预应力的张拉控制过程,根据钢绞线的物理和力学性能指标及预应力施工工艺流程,详细阐述700 t箱梁的张拉施工工艺和施工技术要求以及控制要点,对客专700 t预制箱梁张拉施工控制技术进行系统的总结。

On the basis of the stretch-drawing control construction of the 700-t box girders for Chendu-Mianyang-Leshan Passenger Dedicated Railway,the physical and mechanical performance indicators of steel stranded wires,and the construction technology process for prestressing reinforcement,this paper expatiates on the stretch-drawing construction technology for 700-t box girders,the specification requirements of construction techniques and control points.Furthermore,we systematically summarize the control technology of stretch-drawing prefabrication of box girders for 700-t passenger special line.