Abstract: The common construction methods and their characteristics and applicability of underground construction engineering are introduced in this paper. A new underground construction method, which is the combination of traditional PileBeamArch (PBA) method and improved “TopDown Bored Excavation with CastinSitu Arch” method for the Liberation Boulevard Subway Station Project in Changchun, is introduced. The new construction method is compared with other conventional construction methods and the results indicates that, it has the advantages in construction efficiency, cost effectiveness and ground subsidence control over the traditional PBA method. The new method has the special advantage in the urban underground construction with poor subsurface conditions.

Key words: Subway Station, Construction Method, Topdown Bored Excavation with CastInPlace arch, PileBeamArch Method