2022 Volume 60 Issue 8 Pages 669-675
Technology development to improve the productivity of rebar arrangement inspection, a longstanding issue in the construction industry, is actively being pursued, centering on the PRISM project of the Ministry of Land, Infrastructure, Transport and Tourism and field trials. To the same end, the authors have developed a three-lens camera rebar placement system that can be operated easily and quickly to perform rebar placement measurement and create reports. This system is the first of its kind in Japan to have been adopted for phased verification. The system has also been adopted by and is being routinely used by Hanshin Expressway Company Limited for the Komae Area Open-Cut Tunnel and other sites. This paper describes the system’s configuration and functions, the results of the verification of individual rebar spacing of newly conducted rebar arrangement, and the current average spacing measurement and rebar diameter determination accuracy. Finally, it discusses the applicability of this system not only in the field of civil engineering but also the construction sector.
