Abstract: The deep excavation for Qiutao Road Station of Hangzhou Metro dewatering case history is presented in this paper. The dewatering induced stability at the bottom of the excavated area, the ground subsidence in the adjacent ground as well as the construction impact on the adjacent environment are discussed. Relationship between the seepage cutoff effect and the ground settlement is obtained through the groundwater monitoring on both sides of the excavation. The seepage water leakage induced additional ground subsidence is also discussed.

Key words: Dewatering in Deep Excavations, Stability of the Excavated Area, Impact Effect