Research And Improvement Strategy On Safety Toughness Of Urban Gas Pipeline Network

In recent years,various disasters have occurred frequently in cities,which have had a significant negative impact on the healthy development of cities.Therefore,research aimed at improving the ability of urban systems to withstand,adapt to,and respond to disasters has become a focus of attention for scholars at home and abroad.The previous concepts of urban safety and disaster prevention no longer meet the needs of existing urban development,but the concept of urban safety resilience from a dynamic and developmental perspective has opened up new solutions for responding to urban disaster prevention.Therefore,enhancing and enhancing the safety resilience of cities has become an inevitable trend in urban disaster prevention.With the rapid development of urbanization in China,the necessary supporting gas pipeline network for people’s daily life is also expanding and expanding.Because of the high-risk characteristics of gas itself,safety risks caused by the operation of gas pipeline network facilities occur frequently.The increasingly prominent safety hazards arising from this have led to a series of safety accidents in the gas pipeline network.However,the city’s response ability to such accidents is weak,resulting in a significant impact on the city after the occurrence of gas pipeline network accidents,leading to a decrease in urban resilience.Therefore,studying the safety resilience of urban gas pipeline networks is extremely significant.In this thesis,the concept of resilience is introduced into the safety research of urban gas pipeline network.From the perspective of safe operation of urban gas pipeline network,in order to improve its disaster carrying capacity and enhance the safety resilience level of gas system,the urban gas pipeline network system is studied by comprehensive use of mathematical statistics methods such as combination weighting method and TOPSIS method.Firstly,based on the current research status of urban gas safety issues at home and abroad,the relevant theoretical basis of safety resilience,and the reference to the actual situation of urban gas pipeline network systems,the concept of safety resilience of urban gas pipeline networks has been defined.Through expert interviews and literature analysis,explore and explore potential safety hazards in urban gas pipeline networks.Then,based on the theory of resilience and the PSR model,a dynamic development framework for the safety resilience of urban gas pipeline networks is proposed,and methods such as literature research and expert research are used to identify the types of safety accident factors in urban gas pipeline networks.The PSR conceptual framework divides the safety and resilience indicators of urban gas pipeline networks into three categories,mainly including the pressure indicators(P)generated by the safe operation of urban gas pipeline networks before various disasters and accidents occur,the self state indicators(S)of the network body,internal pipelines,and auxiliary facilities of gas pipeline network operation during disaster accidents,and the emergency response indicators(R)after accidents occur in disaster situations;Then,through questionnaire survey and expert scoring methods,the importance of the determined safety resilience indicator factors was scored,and the weight of the indicators was modified through combination weighting method to clarify the impact of secondary indicator factors under pressure indicators,status indicators,and response indicators on the safety resilience of urban gas pipeline networks.Finally,referring to relevant literature and standard specifications,establish an evaluation index system of "pressure resilience state resilience response resilience",and use TOPSIS method to construct a safety resilience evaluation model for urban gas pipeline networks.Then,apply the constructed evaluation model to the selected four case study objects for safety resilience evaluation and analysis.Based on the evaluation and analysis results,specific improvement measures are proposed from three aspects: pressure,status,and response.To ensure the safe operation of urban gas pipeline networks,it has played a positive role in promoting the sustainable and healthy development of urban gas pipeline networks.