(重庆市设计院有限公司， 重庆市 400015)
郑建文（1984—）， 男， 硕士， 高级工程师， 从事桥梁设计工作。
In recent years, the urban population has shown an increasing trend due to the continuous development of urbanization. In the meantime, since the number of motor vehicles increases with the population, the congestion of urban traffic is getting serious. The elevated expressway is widely used because of its small land occupation, powerful three-dimensional traffic function and other advantages. The construction of urban viaducts will inevitably have negative influences on the current traffic. As a result, it is necessary to carry out the research on the construction and design of the viaduct structure without supports, which is aimed at the study on application characteristics of the different structural forms and construction schemes in the construction of elevated bridges. The reference can be provided for the design and construction of the similar structures in the future.