Technical Note (In Japanese)
THE STUDY ON ANALYSIS OF CRACK PROGRESSION OF TUNNEL LINING BASED ON CONTRIBUTIONS OF CRACK WIDTHS AND ITS LENGTHS BY USING TCI
2020 Volume 76 Issue 1 Pages 79-84
Details
2020 Volume 76 Issue 1 Pages 79-84
Road tunnels in Japan had mainly constructed during the high economic growth period in Japan, and they have already been estimated from 30 to 50 years old and more. The aging of road tunnel will progress rapidly in the future. Therefore, each local governments establish the life extension plan for establish the appropriate maintenance and management plan of road tunnel. The authors applied already the Tunnellining Crack Index (TCI) to each tunnel lining as a quantitative health evaluation method by the increase in TCI indicates a decrease health of the tunnel lining. However, it has not been possible to know the change of TCI whether the increase in crack lengths or the increase in widths. In this study, the contribution of crack width and length to the increase of TCI was separated, and evaluate the crack progression of each contents for tunnel lining.
