Author(s): Liu Yu; Liu Shuguang; Zhong Guihui; Wang Qiuping; Lu Lei; Xu Shengxin
Linked Author(s):
Keywords: COMSOL; Numerical simulation; Water pipeline; Corrosion; Rainfall
Abstract: With the acceleration of urbanization, disasters caused by rainfall have become increasingly frequent. During service, water supply pipelines in the middle and lower reaches of the Yangtze River not only endure various loads but also suffer from dual erosion due to soil environmental corrosion and internal water flow, especially during the frequent occurrences of the plum rain season. This greatly accelerates pipeline deterioration and leads to significant economic losses. Therefore, studying the corrosion processes of water supply pipelines in complex soil environments caused by rainfall is of great significance for urban water supply safety. This study focuses on Shanghai, a highly urbanized area prone to plum rains. It uses COMSOL software to construct a numerical simulation model coupling three physical fields for buried pipeline corrosion. The study investigates the corrosion conditions of water supply pipelines under multiple rainfall scenarios. It establishes a model of pipeline corrosion development, revealing the relationship between service life and the degree of corrosion. It also identifies the characteristics and patterns of the corrosion process. By predicting the corrosion rate through the model, water supply companies can systematically monitor their networks’ service status and reliability, thereby enhancing their ability to address pipeline management issues. This has significant implications for the comprehensive implementation of pipeline integrity management in the future.
Year: 2024