地铁建设中隧道联络通道是重点之一，而在软弱地层中进行联络通道底部泵房开挖则是联络通道施工的关键。结合广州地铁三号线天—五区间二号联络通道泵房的施工，介绍了在富水软弱地层下的土体注浆加固法结合暗挖法的实际应用。

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.