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        Single Shield Tunnel Boring Machine

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        Shield of a tunneling machine is a protective structure for excavating tunnels. With circular cross sections it makes the tunneling easy and simpler and supported the weight of the surrounding soils without any problem. The choice of a single or double shielded tunnel boring machine depends on the type of geology and the excavation speed required.

        It is the geology that decides about the types of the shields to be used. Single shield tunnel boring machines are preferred machine for tunneling soils or hard rocks. It is less expensive and is very effective tunneling machine. Behind shield there is a rotating cutting wheel, chamber and hydraulic jacks which helps in the process of excavation of tunnels.


        Single Shield Tunnel Boring Machine Single shield tunneling machines are used for boring earth or rocks for making tunnels for purposes like :

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