新旧桥梁拼接是高速公路扩建工程的关键环节之一。文章简要介绍了国内外桥梁拼接有关工程实践情况,并根据广佛高速公路二期扩建工程实践及国内外有关研究成果,探讨了中小跨径桥梁拼接时机的选择、大跨径连续箱梁一次性加宽等关键技术问题。 Splicing old and new bridges is one of the key aspects of expressway expansion project. In this paper, the engineering practices of bridge splicing at home and abroad are briefly introduced. According to the practice of Phase II expansion project of Guangfo Expressway and relevant research results both at home and abroad, the selection of splicing timing of small and medium-span bridges is discussed. One- Widening and other key technical issues.