Construction Technology of Pile Foundation for Subway Tunnel Crossing Bridge

Urban infrastructure has become more complex with the rapid development of urban transportation networks. In urban environments with limited space, construction of facilities like subways and bridges may mutually influence each other, especially when subway construction requires passing under bridges. In such cases, pile foundation replacement technology is often necessary. However, this technology is highly specialized, with a lengthy and risky construction period, and high costs. Personnel must be proficient in key technical aspects to ensure construction quality. This article discusses the technical principle, construction process, and core technology of pile foundation replacement, along with the application of this technology in subway tunnel crossing bridge projects, supported by engineering examples for reference.