Excavation and Composite Support of Main Structure of Subway Station Under Unfavorable Geology
In order to discuss the excavation and composite support construction of metro station main structure under unfavorable geological conditions,combined with the actual situation of Maidao Station of Qingdao Metro Line 5,the key points and precautions of the excavation and composite support construction technology of metro station main structure under unfavorable geological conditions are analyzed based on the construction difficulties,and the specific application effects are proposed.The research shows that excavation and support are the key processes in the construction of metro station main structure,and the difficulty of excavation and support will be greatly increased once the complex and changeable geological conditions are encountered.In order to better guar-antee the construction quality and safety,blasting construction parameters should be strictly controlled according to the geological and hydrological conditions of the area where the main body of the station is located,the litholo-gy of surrounding rock and the major and difficult points of construction.Annular step excavation and composite support methods should be adopted to ensure the smooth completion of the construction of the main structure of the subway station under complex geological conditions.
unfavorable geologysubway stationsmain structureexcavationcomposite support
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