Abstract:Various infrastructures and building structures are distributed under the urban roads. These structures form a complex urban underground space environment. As an important infrastructure, the urban bridge foundations also participate in the underground space environment. The design and construction of bridge foundations will be affected by nearby structures underground. Combined with the Xian Fengcheng 8th Road-Taihua Road Interchange Project, the special structural design and foundation treatment measures for bridge foundations to avoid underground structures such as subways and drainage mains are discussed. The measures include the design of prestressed irregular base slab, the reinforcement design of jet grouting pile foundation and the installation of permanent pile foundation steel casings are taken. After research and analysis, the above measures can effectively solve the design problems of the lower foundation of the bridge, which not only saves the engineering costs, but also has a certain degree of innovation. After constructed, the project operates well and achieves good social and economic benefits.
