Disease analysis and reninforcement methods discussion of several sorts of arch bridges

There are many arch bridges in China, such as masonry arch bridges, two-way curved arch bridges and ribbed arch bridges. Many years later, these bridges appear diseases. This paper analysis the reasons of the diseases and proposes many methods to repair these arch bridges. The main diseases of masonry arch bridge are arch ring fracture, sidewall ballooning destruction and concrete decency. The main diseases of two-way curved arch bridges are pier or abutment displacement, arch rib strength deficiency, cross direction connection deficiency and poor drainage of packing. The main diseases of ribbed arch bridges are transverse crack of deck, longitudinal beam crack. This paper proposes many methods to repair these bridges, such as grouting method sealing crack, bending carbon cloth, bending steel plate and adjusting dead load of arch ring. At last, by analyzing profoundly disease reasons of masonry arch bridge, two-way arch bridge and rib arch bridge which are used widely in bridge engineering and providing maintenance and reinforcement measures accordingly and providing reference for reinforcing bridges.