空心板梁预张拉钢丝绳加固工艺研究  

Study on Pretension Steel Wire Rope Reinforcement Technology of Hollow Slab Girder

作　　者：徐一卓 刘波 

机构地区：[1]西安市市政设施管理局,陕西西安710076

出　　处：《城市道桥与防洪》2016年第7期246-247,25,共2页Urban Roads Bridges & Flood Control

摘　　要：预张拉钢丝网片法是一种新的加固方法,该方法的优点是能主动提高被加固物抗弯承载力、加固层较薄不影响桥下净空、能较好地抑制被加固物裂缝发展、绿色环保无污染等。采用钢丝绳网片加固梁体,如果逐根张拉,效率低、浪费大。但是同步逐级顶升安装钢丝绳法,就是在梁底安装可调节高度同步顶升支撑,采用计算机控制实现同步顶升,不仅对梁体伤害较小,还具有效率高、浪费少、效果佳等优点。通过加固后评价和后期跟踪观测,该方法性能优良。The pretension steel wire mesh method is a new reinforcement method. The advantage of this method is that it can actively improve the bending bearing capacity of the reinforced structure, and the reinforced layer is thinner and does not affect the clearance under bridge, and can better restrain the crack development of reinforced structure without the pollution of green environment protection. The steel wire mesh is used to reinforce the girder body. The efficiency is low and the waste is large if tension each by each.The method of synchronously jacking and installing the steel wire rope step by step is to install the adjustable height synchronous jacking support at the bed of girder. The computer control is used to realize the synchronous jacking, which not only has little damage to girder body, but also has the advantages of high efficiency, less waste and excellent effect. According to the evaluation after reinforcement and the late tracking observation, this method has the good performance.

关 键 词：预张拉 钢丝网片 同步顶升 支撑 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]