DECISION OF OPTIMUM RENEWAL TIME AND METHOD OF SEWAGE CONCRETE PIPES CONSIDERING COST BENEFIT

Abstract

It has been around 120 years since the drainage business started in Japan, and maintenance of the drainage system enters the importance stage to sustain its function. Present paper proposes the decision-making method of the optimum renewal time and method of sewage concrete pipeline. Corrosion speed with the acid of sewage pipeline was quantitatively evaluated and the service time of the sewage pipeline was examined. Then, the period that pipeline reaches at each corrosion level and renewal cost were considered in the cost benefit analysis.