框架桥涵顶进施工技术是下穿既有铁路中工程施工的关键技术,广泛运用于增建或新建道路、铁路中。本文结合蓟汕高速公路中下穿北环铁路下的框架桥涵工程,简要介绍了顶进施工技术在下穿铁路工程中的施工步骤及关键技术。结果表明,顶进施工技术具有较好的经济效益和社会效益。 The construction technology of the frame bridge culvert jacking is the key technology of undergoing the construction of the existing railway and is widely used in the construction or new roads and railways. This paper briefly introduces the construction steps and key technologies of jacking construction technology in the underpassing railway project, combining with the construction of the framework bridges and culverts under the North-Central Ring Road in Jishan-Shantou Expressway. The results show that jacking construction technology has good economic and social benefits.