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  Design of Segmental Linings with Macro Synthetic Fibre Reinforcement

  Fibre reinforced concrete is becoming widely utilized in segmental linings due to improved performance and durability of the segments. Further, significant cost savings can be achieved by replacement of traditional rebar cages with fibres. Macro synthetic fibres (MSF) are non-corrosive and thus ideal for critical environments. Recent publications have now given the basis for design and more credibility to this reinforcement type. This paper presents the design methodology for precast tunnel segments and in particular the tasks associated with the use of MSF reinforcement. A case history from the Santoña–Laredo General Interceptor Collector, currently under construction in northern Spain, is provided and will illustrate the specific benefits of MSF reinforcement for segmental linings.

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