Study on Sustainable Maintenance for Facilities in a Water Area Reclaimed Land

― Survey for facilities maintenance in the national Kahokugata reclamation works ―

Abstract

The maintenance and renewal of social capital accumulated during the period of high economic growth in Japan must be carried out under severe financial constraints, and the national government has formulated a basic plan for extending the life of infrastructure and is currently working on it. The national Kahokugata water area reclamation and agricultural land improvement project completed in 1986 is one of them, and the renewal project has been started. This study investigates and analyzes the maintenance history of the tidal lock and drainage pump stations as main facilities of the Kahokugata reclaimed land from the construction of these facilities to the present. We extracted and pointed out the importance of the designing of the maintenance cycle and the implementation timing of the countermeasures to extend the life. According to these results, it is necessary to establish a management system based on the facts from the actual maintenance cost in the previous projects, when implementing sustainable maintenance management based on the stock management of facilities in the future.