To the lack of technologies and practical experience in non-suspension renovation of underground station platforms under non-reserved conditions in China, a study is conducted on the civil engineering renovation situation and the platform renovation practices of Tokyo Metro underground stations. Firstly, through statistics, the spatiotemporal distribution characteristics of Tokyo Metro stations that have undergone civil engineering renovation are analyzed, and the influence of laying method and reserved conditions on the timing and construction duration of renovation is explored. Subsequently, the process for civil engineering renovation of Tokyo Metro underground stations is delineated. Finally, based on specific cases, the main objectives and key points of platform extension, platform widening, platform addition and comprehensive platform renovation are analyzed, and relevant insights for the construction of metro stations in China are summarized. The study results show that about 15.1% of the current 259 underground stations of Tokyo Metro have undergone civil engineering renovation, which is a considerable number. The civil engineering renovation construction steps of underground stations usually follow “from outside to inside, build new first and then demolish old”. For the underground stations of Tokyo Metro, only platform extension may have reserved platform extension space based on the length of future train formation, whereas platform renovations under non-reserved conditions prioritize minimizing renovation scale, demonstrating that underground lines need to pay attention to reservation design with high cost-effectiveness and the underground station platform renovation under no reserved conditions needs to emphasize targeting. The long-term station renovation project needs to strengthen risk warning and dynamic control. Station-city integration requires balancing station passenger flow carrying capacity with surrounding land development intensity. The study findings can provide reference for the design and renovation of underground station platforms in China.

urban rail transit  /  Tokyo Metro  /  station civil engineering renovation  /  underground station  /  platform renovation