Rapid growth in urban development has resulted with the congestion at the earth surface and increased demand for the underground construction subsequently. Tunnels are an essential component of the underground schemes and constitute one of the major parts of project expenditure. Tunneling through cities underlain by soft soil, commonly associated with soil movement around the tunnels and subsequent surface settlement. The factors influencing ground movement include the geotechnical conditions, tunnel dimensions and construction method. This research concerns tunnelling induced ground surface settlements in groundwater drawdown environment. When tunnelling under the groundwater table, the tunnelling inevitably results in groundwater inflow into the excavated area, thus causing the groundwater drawdown. Such a tunnelling induced groundwater drawdown induces associated settlements in addition to the settlement due to the excavation. The related ground subsidence occurring as a result of the reduction in water pressures in the soil layers can damage nearby structures/utilities. A numerical simulation has been developed for sensitivity analysis of soil movement around a tunnel and surface settlement which includes various geotechnical conditions. Geotechnical and hydrogeological parameters has been obtained from Tabriz Subway Tunnels that were excavated in soft cohesive soils below the groundwater level using earth pressure balance shield machines. This research presents the sensitivity analysis which focuses on the soil properties and groundwater conditions. The results demonstrate that geotechnical and hydrogeological conditions significantly affect the surface and subsurface settlements.