Abstract:

The construction of the connection tunnels of the running tunnels of Metro works is one of the critical aspects of Metro works. The excavation of the pumping stations on the floors of the connection tunnels located in soft ground is of fundamental importance to the construction of the connection tunnels. Taking the construction of No. 2 pumping station of TianWu running tunnel on line 3 of Guangzhou Metro as case history, the authors present the application of the soil grouting consolidation method and mining method in waterrich soft ground.