天津解放桥恢复开启工程应力监测

Stress Monitoring of Tianjin Jiefang Bridge in the Gating-function Recovery Engineering

为使有80年历史的钢结构桥——天津市海河上的解放桥恢复开启功能,需对其进行全面整修,并对原桥的活动跨作较大的改造。为使解放桥恢复开启工作安全顺利实现,掌握活动跨承载下的力学性能,采用了实验应力分析电测法对活动跨进行称重、开启及预压试验进行监测。监测结果表明:解放桥在施工中是安全的,在恢复开启功能的运营中也是安全的。监测结果为类似工程的安全修建和科学施工提供了依据。

In order to recover the gating function of Tianjin Jiefang Bridge, a steel bridge over Haihe River with more than 80 years history, an overall refitting as well as considerable reconstruction of its mobile bridge spans is necessary. Due to safe and successful implementation of the project and understanding the mechanical properties of mobile bridge span under loading, an experimental electrometric stress analysis for mobile bridge span was carried out by means of weighing, gating and preloading monitoring. Monitoring results show that the construction of Jiefang Bridge and the recovered gating operation are safe, which provides the evidence of safe and science construction for similar projects.