盖挖法在双岛四线平行换乘地铁车站中的应用

Application of Top-Down Method in Twin-Island Four-Lane Parallel Transition Station

本文对国内第一座采用盖挖法施工的双岛四线平行换乘地铁车站-国家图书馆站的设计进行了总结,通过对交通的影响、施工难度、工期及管线改移难易程度等方面进行比较,创造性的提出了盖挖逆作法施工国家图书馆站的全新思路。采用增量法对施工进行了全过程模拟,对车站围护结构的受力、变形进行了分析,并且采用大型通用计算程序ANSYS对钢管混凝土梁柱节点进行了分析,结果表明结构是安全可靠的。本文对今后类似工程的实施具有一定的参考意义。

This article summarized the first application of topdown method in twinisland t0urlane parallel tran sition stationthe national library station in Beijing. Through comparing the impact on traffic, construction difficulty, construction period and the difficulty of pipeline alteration of the project, the topdown method is creatively proposed in construction of the National Library Station. To assess the construction safety, the incremental method was em ployed for the whole simulation process of construction ; the stress and deformation of the building envelope of the sta tion were analyzed; and ANSYS, the general finite element software, was used for the analysis of steel tube concrete beamcolumns joints, and the results prove that this structure is safe and reliable. This article is of referential mean ing for future implementation of similar projects.