Research on Influence Effect of Multiple Influence Factors of Structural Hidden Dangers on Underground Pipelines

Underground pipelines are municipal facilities in cities, but their environments are very complex, and have many influence factors that can lead to hidden dangers of underground pipelines. This paper extracts the influence factors of the structural hidden dangers by using data analysis, case analysis and mechanism analysis, and obtained a set of influence factors. A model for analyzing the influence factors of structural hidden dangers of underground pipelines was constructed based on DEMATEL and ISM. The influence degree, influenced degree, center degree, and cause degree of the factors were calculated, and the hierarchical structure of the factors was divided. The factor attributes, importance and the relationship between the factors were clarified. The research results show that rainfall, groundwater depth, landslides and mudslides are the deep-cause factors with larger centrality and out-degree; Soil physical properties, soil settlement and underground diseases are intermediate-result factors with high centrality and accessibility. The adjacent underground pipelines, abandoned civil defense engineerings and road conditions are surface-result factors with high centrality and in-degree. The centrality of active faults, rivers and lakes, and surrounding construction is relatively smaller, but these factors are deep-cause factors with larger out-degree, and they may also promote the development of other factors. Based on the analysis results, corresponding preventive measures for structural hidden dangers of underground pipelines are proposed.