Abstract
In the development of reinforcement method for plain concrete lining of waterway tunnels reinforcement extent and area was examined with full scale specimens. A cavity on the outer surface of the tunnel crown and cracks in lining concrete were considered on experiments, and reinforcement effect was confirmed for various situations of cracks and thickness of concrete lining. Load bearing capacity and deformation suppressing performance were evaluated, changing the extent and area of CFRP strand sheet and embedding reinforcement bar into the tunnel invert where the application of CFRP strand sheet is difficult. Obtained results showed that the reinforcement with CFRP strand sheet and ceramic mixed epoxy resin mortar could significantly improve load-resistant capacity and deformation suppressing performance of plain concrete lining of waterway tunnels in case of appropriate extent and area of reinforcement. Moreover, from the view point of the reinforcement design of this method, the verification method of the CFSS reinforcement amount based on the results of the full scale specimens test was suggested.
