Abstract Shield tunneling surpasses traditional tunneling methods by adopting shield machines to cope with complex geological and construction condition. This is most remarkable in tunnel construction in multilateral seabed (comprising rocks，gravel and broken layers)under high water pressure. The effective application of the composite pressurized-plaster shield machine in the cooling-water discharge tunnel in seabed for nuclear power plant engineering，which involves stabilization of excavation face，mucking，excavation equipments，monitoring devices，and special support equipments for arriving-seabed construction in difficult geological and construction conditions，is established by this study.
2004, Vol. 23 
