旧桥病害分析与加固方案的研究

针对湖南省现存双曲拱桥主拱圈的主要病害,分析了病害产生的原因,介绍了加固处治方法.以某大桥为例,阐述了双曲拱桥拱肋底缘利用现浇混凝土底板,将主拱圈封闭形成箱形,从而把双曲拱桥改造成为箱型拱,并通过增大主拱圈的截面面积提高其承载能力;同时将拱式腹拱及拱顶实腹段等拱上建筑拆除后,对腹拱墩加固之后在墩顶设置墩帽重建为连续板式...

An Analysis of the Reasons for Disease from the Used Curved Arch Bridge and its Reinforcement Programme

According to existing double-curvature arch bridge in Hunan Province and analysis of the main diseases of the arch ring,this paper introduces the strengthening treatment method.Adversity hyperbolic arch bridge in the old arch rib margin at the bottom of cast-in-place concrete floor makes the main Arch become a closed box,thus it transforms the two-way curved arch into the Box-shaped arch,through increasing cross-section of the main Arch area,thus increasing its load ability.Meantime,after removing the Spandrel Arch and the vault of Solid-web and other Spandrel Construction,then strengthening the Spandrel Arch pier,after setting for the reconstruction of consecutive plate arch construction,in the top pier cap,thereby it reduces dead load to adjust the main Arch force to improve the load transverse distribution coefficient,and to improve the carrying capacity of the bridge.