Abstract
In this study, the general corrosion of water distribution pipes which shows the spread of outside cor rosion was analyzed using the field survey data which was collected by Tokyo Waterworks Bureau. At first, the factor relevance structure map was constructed using correlation analysis. Installation period and polyethylene sleeve were important factors for general corrosion. In addition, correlation between the survey data about soil environment such as pH and general corrosion was confirmed.
Secondly, the diagnostic model for understanding general corrosion without digging out was constructed using quantification theory. As the result, the diagnostication of general corrosion was made possible by the survey data about installation period and polyethylene sleeve.
Finally, using regression analysis, the transition over time of general corrosion was compared according to the condition of polyethylene sleeve and soil environment. Additionally, the uncertainness of general corrosion in future was grasped by extended prediction.
