Abstract
In Japan, by low birthrate and aging population recently, the accumulation of the enormous social capital infrastructure is brought to a crisis progressively. To secure a comfortable civic life, we must advance an argument to minimize the expense of renewal and maintenance of the infrastructure maintaining the service level. However, in the small enterprise, the quantitative verification is still lack and difficult how to plan and perform the renewal and the maintenance of the sewerage systems from the long-term viewpoint with present service level.
In this study, we quantitatively show the renewal and maintenance methods and cycle periods of pipe lines considering the asset management of the sewerage systems. Firstly, we propose the possibility of degradation per the standard length because of the unified point of view in the sewerage pipe. Comparing with the standard possibility the possibility of degradation per the sewerage pipe, we can grasp the deterioration conditions of the sewerage pipe lines.
In addition to these deterioration's indexes, we propose the renewal rules about the follow-up period and repairing cycle about the renewal and the maintenance methods based on the possibility of severe structural degradation. By the practical applications of renewal rules, we quantitatively show that the cycle periods are extended, the maximum repairing length per year is relieved and the repairing length per year is levelling in this renewal project.
