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TUNNELING

Tunneling is a method where the erection of a ground support system is constructed near the point of excavation. A shield or TBM is used to support the ground during excavation and provide a place to erect the tunnel support. The tunnel diameter must be large enough for man entry and erection of a ground support system behind the shield.

Pacific Boring, Inc. | Ca. Lic/No. 553794 | P.O. Box 727 Caruthers, Ca 93609 | Phone:(559) 864-9444 | Fax:(559) 864-9256

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