城市道路下穿立交引道方案研究

随着经济和社会的发展，城市对交通功能的需求逐步提高，道路平交道口改为下穿式立体交叉工程也越来越多。结合山东某沿海城市道路改造工程，对道路下穿立交中地道桥引道方案进行研究，通过对U型槽主动抗浮方案、渗沟排水方案、疏水消浮方案的分析比选，结合城市用地、水文地质、工程经济、低影响开发等因素，得出本地区改造工程适用的立交引道方案，并为同类工程设计提供思路和借鉴。

Study on Approach Scheme of Urban Road Underpass Interchange

With the development of economy and society, the demand for traffic functions in cities is gradually increasing. There are more and more projects of changing the road intersection at grade into underpass interchange. Combined with a coastal urban road reconstruction project in Shandong, the approach scheme of underpass bridge in road underpass interchange is studied. Through the analysis and comparison of the active anti-uplift scheme of the U-shaped groove, the drainage scheme of the seepage ditch and the scheme of hydrophobic float elimination, combined with the urban land use, hydrogeology, engineering economy, low-impact development and other factors, the approach scheme of interchange applicable to the reconstruction project in this area is obtained, which provides the ideas and reference for the design of similar projects.