砼旧桥加固改造的横张体外预应力关键技术  

The Key Technology of Vertically Tensioned External Prestress in the Reinforcement and Reconstruction of Old Bridge

作　　者：朱世峰 唐中波[2] 

机构地区：[1]中铁大桥局武汉桥梁科学研究院,湖北武汉430034 [2]四川路桥建设股份有限公司,四川成都610034

出　　处：《公路工程》2010年第3期63-66,80,共5页Highway Engineering

摘　　要：基于目前体外横张预应力研究现状,以调控连续刚构桥跨中后期挠度为例,对其施加预应力进行调控的时机和预应力束横向张拉空间进行了探索性研究。Based on the displacement of vertically tensioned prestressed techniques to reinforce the old bridge, take regulating the midI-span deflection of rigid frame bridge for example, the regulation time and stretching space were investigated and demonstrated.

关 键 词：体外预应力 横张预应力 调控时机 张拉空间 挠度 桥梁 

分 类 号：U445.71[建筑科学—桥梁与隧道工程] U448.23[交通运输工程—道路与铁道工程]