某低高度钢筋混凝土梁重载改造技术研究

Study on Heavy Load Reconstruction Technology of Low Height Reinforced Concrete Beam

由于桥梁作为铁路线路的重要组成部分,列车轴重的增加必然对既有桥梁的性能提出更高的要求。以某跨度10 m低高度钢筋混凝土梁重载改造为实例,综合分析梁体病害原因,经过比选提出了桥梁重载强化改造技术方案,阐述强化改造施工方案及其控制技术要点。通过现场检测各项关键指标均能满足规范要求,达到预期加固效果,能为类似项目提供技术参考。

The bridges are the important components of the railway line.The increment of train axle weight is necessary to put forward the higher requirement for the performances of the existing bridges.Taking the heavy load reconstruction of a 10-m span low height reinforced concrete beam as an example,the article comprehensively analyzes the disease cause of beam.According to the comparison,the article puts forward the heavy load reinforcement reconstruction technology scheme of bridge,and sets forth the reinforcement reconstruction scheme and its control technical gist.Various key indexes can all meet the code requirements through the field tests,which can show that the expected reinforcement effects are achieved,and can provide the technical reference for the similar projects.