双曲拱桥的结构特点及加固浅析

Simple Analysis of Structure Features of Double Curved Arch Bridge and Strengthening of It

双曲拱桥是中国独创的一种少筋混凝土拱桥，目前全国干线和县乡公路上正在运营的大、中型双曲拱桥达4000多座，约占地方道路大中型桥梁总数的25％左右。现在相当一部分双曲拱桥都出现了一些病害现象，已经进行加固处理或需要进行分析处理的桥梁很多。本文主要介绍双曲拱桥的构造、病害现象、分析病害产生的原因，并提出适合双曲拱桥加固的处理技术。

Double curved arch bridge is a sort of concrete arch bridge of less reinforcements and original creation in China. At present,large and medium double curved arch bridges which are operating on arteries of all country and highways of county and countryside, reached more than 4000 pieces, covers approximately 25 percent of total of large and medium bridges on local roads. Currently, considerable part of double curved arch bridges yielded some diseases ,there are many bridges which have been reinforced or need treatments. The paper principally introduces the structures and diseases,and analyzes the reasons for disease,in addition puts forward treating technique appropilate for strengthening the double curved arch bridge.