A STUDY ON THE DESIGN OF STEEL FIBER REINFORCED CONCRETE USED FOR LARGE DIAMETER TBM TUNNEL LINING

Abstract

Japan Highway Public Corporation has a plan to use reinforced concrete lining in collapse-prone sections of a long tunnel to be excavated with a full-section TBM for two lanes. The lining for the TBM will be manufactured on the site. In order to save in-situ processing and assembly of reinforcement for higher productivity, adoption of steel fiber reinforced concrete was studied. As a result, the lining made of steel fiber reinforced concrete have proved safe under expected loads.