Abstract: Very restrictive requirements are imposed on the excavations that are very close to the active operational subway. This paper presents a case history of the deep excavation of Rongchan Houhai Building, which is very close to a subway. The challenges in the design and construction as well as the approaches used to overcomes these difficulties. Three dimensional finite element analyses were used to simulate the entire excavation. The deformation results in the numerical analysis were compared to the field observed data.

Key words: Subway Tunnel, Deep Excavation Supporting Design, Three Dimensional Analysis, Deep Excavation, Deformation Control