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钢筋混凝土桁架拱桥于20世纪60～70年代逐渐成型、规范的一种结构简单、施工方便、造价低廉的通用桥梁,广泛用于公路与水利建设。随着时间的推移,经济的发展带来交通流量的大幅增长,特别是超载运输车辆的作用,早期修建的荷载标准低的桁架拱桥出现了不同程度的病害和损伤。文章对桁架拱桥的常见病害产生原因进行了全面的分析,对桁架拱桥各部分构件提出详细的加固方法及施工要点,通过实例详细介绍了桥梁的加固效果。
Reinforced concrete truss arch bridge in the 20th century, 60 to 70 years gradually formed, the specification of a simple structure, easy construction, low cost universal bridge, widely used in highway and water conservancy construction. With the passage of time, the economic development brought a substantial increase in traffic flow, especially the role of overloaded transport vehicles. The truss arch bridge with a low load standard built in the early stage showed varying degrees of disease and damage. The article makes a comprehensive analysis of the causes of common diseases of truss arch bridge, puts forward detailed reinforcement methods and construction points for each component of truss arch bridge, and introduces the reinforcement effect of the bridge through examples.