Current Studies of Key Technologies for Widening Modification of Concrete Girder Bridges with Small and Medium Span
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.
万方数据
维普
