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Controlling Tunnel-Lining Costs�Tips for Owners and Designers

by Gary S. Brierley, (M.ASCE), Manager; Rochester Office, Haley & Aldrich, Rochester, N.Y.,


Serial Information: Civil Engineering—ASCE, 1978, Vol. 48, Issue 7, Pg. 51-53


Document Type: Feature article

Abstract:

Emphasis is placed on those aspects of design likely to lead to cost savings or the avoidance of unanticipated extra cost during construction. Tunnel lining design requires knowledge about how the lining will behave structurally in contact with the surrounding ground and about how the lining will be constructed. As ground load is applied to the lining, the lining simultaneously gains support from the ground. This interaction greatly reduces stress and deformation of the lining and increases the strength of the lining/ground system. It is overly conservative to ignore the beneficial effects of lining/ground interaction. Failure to recognize during design restraints imposed on the construction process by the restricted tunnel environment may result in significant increases in cost. Specifications for tunnel linings must be carefully tailored to the tunneling environment.

Subject Headings: Linings | Tunnels | Construction costs | Construction management | Tunneling | Owners | Load factors

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