Deformable tunnel

Details Deformable tunnel Deformable tunnel

E - Fixed Constructions

21

D

61/64

E21D 11/04 (2006.01)

Patent

CA 1185801

A B S T R A C T A reinforced, precast concrete tunnel segment or reinforced pre- cast concrete lagging for use in the assembly of a deformable tunnel, each concrete segment or concrete lagging comprising opposed radially extending side walls being tapered from the outer surface proximate the surrounding rock or ground when the deformable tunnel is erected, to the inner surface and flexible resilient foamed thermoplastic material of substantially uni- form thickness secured to one of the tapered side walls, the angle subtend- ed at the center of the tunnel to be erected by the side walls, if extended to the center of the tunnel being substantially Image where n is the number of segments or laggings comprising a tunnel ring.

398061

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