Construction Machinery

  Construction Machinery | Construction Industry | Suppliers Directory | Dozers
Construction Machinery Construction Machinery
Building Construction | Tunnels Construction | Dams Construction | Roads Construction | Canals Construction | Bridge Construction | Articles
Home » Tunnels Construction Machinery » Tunnel Boring Machinery » Earth Pressure Balance Shield

Earth Pressure Balance Shield

Building Construction Machinery

Looking for Wholesale Earth Pressure Balance Shield?

Allow us to help you find the right suppliers to match your product interests.



Earth pressure balance shield is another important type of tunneling machine. It is normally applied for varying soil compositions and is excellent for smaller work sites. Within shield, the cutter excavates the site through rotary motion. In the earth-pressure balance shield, the excavated soil balances the excavating front. All excavation takes place within a steel ring called the cutter bit. In the excavation chamber, the excavated soil is mixed with a conditioning agent.

An excavated soil is carried to a conveyor belt through a screw conveyor. From here soil is taken to the slurryfying box, where it is mixed with water and is taken out of the tunnel by the dredging pumps.



Earth Pressure Balance Shield The excavated soil is mixed with additives and kneaded forcibly with the kneading blades to improve its plastic fluidity and impermeability. In the cutter chamber the pressure of the excavated soil is increased to counterbalance the tunnel face earth pressure and the groundwater pressure. Tunnel face can be sustained by muddy soil pressure to minimize ground settlement.

Applications

The major applications of earth pressure balance shields are :


Copyright 2022 Construction Machinery. All rights reserved.