Abstract: It is a common and challenge hazard of the groundwater gushing from the water enriched weak soil strata during the deep excavation. This paper presents an engineering case study of the treatment of groundwater gushing during a vertical shaft excavation in the coastal soft soil areas. The aspects that might potentially affect the groundwater gushing, such as, specific site conditions, special construction methods and sequences are also discussed in the paper. Summaries in the deep excavation are provided with the aim of providing references for the future constructions in the similar areas.

Key words: Soft Water Enriched Soil Strata, Deep Excavation, Groundwater Gushing, Failure Modes, Mitigation Methods