Planning Strategies on the Integrated Development of the Station and City in Large All-Underground Transportation Hub Area—Take the Beijing Sub-Center Station as an Example

The Beijing Sub-Center Station is a large-scale underground transportation hub, located in the core area of Beijing Sub-Center by the Grand Canal. The total construction area of the hub is approximately 1.28 million square meters, with a total depth of about 30 m. The underground space will focus on the transportation function of the hub, while the above-ground area will form a highly concentrated financial & business area. This paper, based on the underground space planning of the Beijing Sub-Center Station, will systematically discuss the comprehensive planning strategies of the underground space concerning six main aspects, that is the ecological adaptability of the station, the establishment of an efficient transport system, the continuous pedestrian network, the integration of underground facilities, the economic value of the underground space and the application of new technologies to improve the underground resilience. The planning strategies in response to these key issues will provide useful reference for the integrated development of the transportation hub area and improve the overall operational efficiency of the urban region.