ABSTRACT
In the severe cold areas of northern China, it is impossible to cut and cover underground structures in winter, thus extending the construction period of the project. To address the difficulty of construction in winter, since 2012, the prefabricated construction technology of metro station has been studied and applied in the engineering system of Metro Line 2 in Changchun, Jilin Province, China. This paper briefly introduces the main technical contents and key technical achievements of the research and application of the prefabricated construction technology of metro station structures in the past 10 years, mainly including component joint connection technology, mechanical behaviors of structural system, earthquake resistance behaviors of prefabricated structure, mechanical properties of lightweight structural component, waterproof technology of prefabricated structure, production technology of precast component and construction technology. Engineering practice has proved that the prefabricated assembly construction technology for metro station structures is of high quality, efficient, safe and environmentally friendly. It is not only suitable for the construction of metro stations under various environmental conditions in other cities, but also for the construction of other cut-and-cover underground structures, e.g. metro section, pedestrian passageway, road tunnel and underground pipe rack, with a broad applicability.
