摘要
为应对公路交通量的增加以及道路通行需求的增大,对原有桥梁进行加固与拼宽改造可以避免拆除重建,节约建筑资源。随着桥梁拼宽技术在既有公路改扩建工程中的广泛应用,对其拼宽的方案设计、施工工艺以及关键问题的研究逐渐增多。分别对国内外中小跨径混凝土梁桥拼宽改造应用现状、拼宽连接方式及关键技术问题研究进展进行了分析与总结,结果表明:在现有研究中,对于中小跨径混凝土梁桥拼宽中混凝土收缩徐变与新旧桥基础不均匀沉降等影响因素给出了分析标准,已有的拼宽形式与拓宽工艺已得到实际工程的广泛应用,但仍有亟待解决的技术问题。
To cope with the increasing expressway traffic and higher demands for traffic capacity,the reinforcement and the widening modification of existing bridges can avoid bridge demolition and reconstruction and save construction resources.As the bridge widening technology has been widely applied in the reconstruction and expansion engineering of existing highways,studies on the widening design,construction process,and key issues have gradually increased.This paper analyzes and summarizes domestic and foreign progress on current widening application situations,widening connection methods,and key technologies of concrete girder bridges with small and medium span.It is concluded that current studies have given the analysis criteria for factors such as concrete shrinkage creep and uneven settlement of new and old bridge foundations affecting the widening modification,and the existing widening form and process have been widely used in actual projects,but there are still technical problems that urgent to be solved.
作者
李群锋
许志刚
宋磊
肖明琦
LI Qunfeng;XU Zhigang;SONG Lei;XIAO Mingqi(Shanxi Transportation Survey&Design Institute Co.,Ltd.,Taiyuan,Shanxi 030032,China;Shanxi Transportation Technology Research&Development Co.,Ltd.,Taiyuan,Shanxi 030032,China)
出处
《山西交通科技》
2024年第2期102-105,共4页
Shanxi Science & Technology of Transportation
基金
山西交科集团创新发展项目(22-JKCF-05)
关键词
桥梁拼宽
拓宽改造
混凝土梁桥
基础沉降差
混凝土收缩徐变
bridge widening
widening modification
concrete girder bridge
foundation settlement difference
concrete shrinkage creep
