11m宽岛式站台明挖无柱拱形地铁车站的设计

Design of Open-cut Non-column Arch Metro Station with 11m Wide Island platform

为实现大跨度无柱地铁车站结构,提高车站服务水平,在对已建无柱地铁车站结构分析的基础上,以沈阳地铁3号线为依托,拟定了11 m宽岛式站台的明挖无柱拱形地铁车站结构,并进行了力学性能、建筑空间、管线综合等方面的研究。结果表明:新拟定的无柱拱形结构和改造的三角形轨顶风道受力性能良好,不用设置抗拔桩,不用考虑围护结构联合受力,有利于保证防水质量和结构耐久性,可适用于多种地质条件;该无柱结构的车站建筑空间效果好,客流组织顺畅,利于管线综合布置,可提高车站服务水平与效率;通过调整顶、底板拱的矢跨比,并联合中板斜撑结构,可应用于岛式站台宽度大于11 m的无柱车站。

In order to realize the large-span non-column metro station structure and improve the station service level,through an analysis of the existing non-column metro station structure relying on Shenyang metro Line 3,an 11 m wide open-cut non-column arc metro station structure is drawn up,the mechanical property,building space and pipeline synthesis of which are studied. The research results show that:the newly proposed non-column arch structure and the modified triangular rail top air duct have good stress performance,and can ensure the waterproof quality and durable structure in various geological conditions,neither the anti-pulling piles nor the combined force of the enclosure structure need to be considered. This non-column station structure has good space effect, leading to smooth passenger flow organization and comprehensive arrangement of the pipeline,therefore can improve the service level and operation efficiency of the station. The adjusted rise-span ratio of the top and bottom arch with the inclined supporting structure of the middle plate can be applied to the non-column station with platform wider than 11 m.