Study on the mechanical characteristics of station structure with large column span and large story height of Y-shaped column
Along with the high-speed construction of domestic urban rail transit,our planning and design put forward more new requirements for the spatial form of subway stations and the structural form of its intersectional tunnel sections.In or-der to meet the multi-dimensional demands of residents for the high utilization rate of urban underground structure space and the high ornamental environment,a variety of unique underground structures such as large span,high section,wide column spacing and special-shaped columns have also appeared.Compared with the transmission column,the station structure with the long-span Y-shaped column has become a new structure,which can provide much more spacious actual space than the traditional station structure.In order to study the stress characteristics of the subway station with the new structure,taking Guangzhou Metro Caihongqiao Station as an engineering case,MIDAS software was used to establish a three-dimensional model and divide the real grid.FLAC3D software was used to analyze the settlement and stress of the station beam and the stress variation law of the Y-shaped column.
large spansubway stationsY-shaped columnfinite difference element
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