Abstract
The damage caused by the aging of sewage pipe systems has become one of the major rising problems in modern cities. The traditional method to search for damage points of sewage pipes is the use of cameras and human observation. However, the use of these methods to check all the sewage pipes in the city will require a great deal of time and money. In this paper, a quantitative analysis on sewage pipe damage is reported. This study utilized the results of the sewer investigation in Tokyo. Based on this analysis, a quantification theory type II is proposed to describe the relationship between various factors that contribute to the damage of sewage pipe systems. Thus, these factors, including pipe diameter, number of years since installation, type of road and foundation, overburden, and pipe slope, can be used to judge if the sewage pipe displays corrosion, cracks, or breakage. As a result, the diagnosis model can be used to determine the likely extent of damage to an existing sewage pipe system.
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