Abstract:The underground road of Yuhan Road in Shunhe Elevated South Extension Line in Jinan is located in the urban core, and is an important component in the expressway network system of Jinan. In the overall design of the underground road of Yuhna Road, the design conditions of the engineering complexity are firstly expounded. And then the overall plane alignment scheme of the project, and many schemes of underground road section and construction technologies are analyzed and compared. The node schemes for south and north openings of the underground road, and the auxiliary engineering solutions of the underground road are introduced in detail. The conclusion shows that the combined layout structure form of box culvert + double connecting arch + ultra-small clear distance tunnel is adopted for the underground road, and crosses under Yuhan Road. The design and construction are integrated, and the combined construction technology of trench excavation + trenchless excavation is adopted, which effectively overcome many technical difficulties of hard traffic organization, complex geological conditions and dense underground pipeline networks during the construction.
