Underground pipeline sound deterioration estimation prediction method

摘要

PROBLEM TO BE SOLVED: To provide an underground buried pipeline deterioration estimation prediction method having excellent prediction accuracy. An attribute function is calculated with reference to a basic information database. The attribute function is a function of pipe age and high soundness ratio calculated in the subdivision of the attribute of the sewer pipe span. In addition, the tube age function is calculated with reference to the basic information database. The tube age function is a function of tube age and high health percentage for all surveyed sewer drain spans. Next, the difference between the attribute function and the tube age function is calculated. Then, a linear discriminant function formula is derived with any one of the pipe age and the pipe age function and the difference related to one or more attributes other than the pipe age as explanatory variables, and the discriminant value is obtained for each sewer pipe span. To predict the deterioration of the sewer pipe span. [Selection diagram] Fig. 2