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One-pass Segmental Lining in a Corrosive Environment

One-pass Segmental Lining in a Corrosive Environment

pap161

J. Riechers / G. Recher / S. Allain

Tunnels constructed for the purpose of discharging waste water as well as forpreventing wet-weather overflows by intermediate storage are particularly exposed to internalcorrosion due to sulfuric acid attacks. The awareness of the internal corrosive environment has beenincreased by rising expectations regarding life span, which in turn led to higher requirements onprotective lining materials for application in concrete tunnels. This paper will focus one-passsegmental lining which enables the integration of a corrosion resistant liner during the castingprocess of reinforced segments. Based on a brief discussion on different mechanical anchored liningmaterials, this paper summarizes their usability in concrete moulds and handling on the job-sitebased on case experiences. The findings will be compared with a new one-pass segmental liningsolution which differs considerably from other systems.

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Year 2014
City Foz do Iguaçu
Country Brazil