【摘要】 危旧双曲拱桥改造的方法很多,如增大截面法、黏贴法、改变截面形式法等,这些方法主要针对主拱圈的加固与改造,效果也很明显.为充分发挥拱上建筑的"联合作用"的潜在能力,对双曲拱桥拱上建筑进行改造,可以达到加固双曲拱桥的目的.通过拱式拱上建筑改为梁式拱上建筑的方法加固上曲拱的探讨与实践,论述了拱上结构改造的原理、依据、方法及设计要点.该方案应用于旧桥改造中,对结构损伤小,加固效果显著,最低限度的交通影响,最低的改造费用,可取得较好的经济和社会效益.该法对广大的技术人员设计有一定的参考价值.更多还原

【Abstract】 Old arch bridge reconstruction methods,such as increasing section method,adhesive method,change the section form method,these methods mainly to the main arch ring of reinforcement and reconstruction,the effect is also very obvious.In order to make full use of construction on arch "combined" potential,the spandrel construction transformation,can achieve the purpose of reinforcing double arch bridge.This article through the arch to beam arch construction method to reinforce the upper arch of research and practice,discusses the arch structure transformation principle,basis,methods and key points of design.The method applied in reconstruction of old bridge,the structural damage,reinforcement effect,minimal traffic impact,minimum modification cost,can obtain better economic and social benefits.The method on the general design and technical personnel have a certain reference value.更多还原