| This research provides a methodology which can be used in the design of pressure tunnel* liners. Many lining types, e.g., steel pipes, cast in place (CIP) concrete pipes, reinforced concrete pipes, reinforced concrete cylinder pipes, precast segmental liner etc., have been used in pressure tunnels. The selection of a liner type for pressure tunnels is an iterative process which depends heavily upon the nature of ground subsurface geological conditions, internal fluid pressure, ground stiffness, tunnel configuration, method of tunnel construction, in situ stress conditions of the soil and the design life of the structure.This thesis report presents an approach to the design of cast in place, steel fiber reinforced concrete liner for pressure tunnels from the constructability point of view. The City of Edmonton's inverted siphon (WESS-W12) Project, crossing the North Saskatchewan River, has been analyzed as a case study.*Tunnel with internal fluid pressureDesigning a liner for a pressure tunnel presents a particular challenge to the design engineer as there is no simple, straight-forward approach to designing a tunnel liner. Municipalities and public infrastructure authorities want a design that is not only feasible and economical for a particular situation but also in keeping with the safety standards set out in engineering regulations. |
