A Quantitative Comprehensive Evaluation Method for Drainage Piping Defects

Abstract

The invention discloses a method for quantitatively and comprehensively assessing defects of drainage pipelines. The method includes respectively classifying severity degrees of different types of the defects of the drainage pipelines; assessing integral conditions of the drainage pipelines according to the types of the defects and classification results; classifying the drainage pipelines into different defect grades to obtain maintenance priority of the pipelines. The types of the defects include types of structural defects and types of functional defects, and each defect can be in a minor grade, a moderate grade, a severe grade and an emergency grade. The method has the advantages that the influence of the various defects on different properties of the pipelines is considered, the sealing performance, the stability, the functionality and the integral conditions of the pipelines are comprehensively assessed and are quantitatively represented, different defect conditions of the pipelines can be effectively compared by the method owing to controllable index value ranges, and shortcomings in the domestic technical field of assessment for sewage pipelines are overcome.

Description

technical field [0001] The invention relates to a method for assessing defects of drainage pipes, in particular to a quantitative and comprehensive evaluation method for defects of drainage pipes. Background technique [0002] In recent years, with the acceleration of my country's urbanization process, the construction of urban drainage pipe network has developed rapidly. Although my country's design code stipulates that the design service life of drainage pipes is more than 50 years, with the increase of use time, the possibility of pipe defects will increase. In some cities in my country, losses or accidents have occurred due to serious drainage pipeline defects, such as land subsidence caused by leakage, sewage leakage and pollution caused by blockage, and abnormal operation of sewage plants caused by groundwater infiltration. To avoid accidents, regular inspections and condition assessments of drainage pipes should be carried out, and a pipe maintenance plan should be de...

AI Technical Summary

Problems solved by technology

At present, many countries and domestic cities have proposed corresponding evaluation standards for this technology, but these evaluation standards lack quantitative comprehensive evaluation indicators that consider multiple defects (including structural and functional defects) at the same time, making the health of different pipelines There is no comparability between the situations, and it has little guiding significance for the management of urban drainage pipe network

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