| Since the spread of sustainable development ideas,people have been absorbing different ideas and ideas to enrich sustainable development strategies and models.As a systemic thinking of adapting to environmental changes and advocating coexistence with "interference",resilience theory emphasizes the self-adjustment ability of actively adapting to complex environmental changes,compared with the traditional disaster prevention concept of infrastructure being single passive and static prevention oriented.It has become the guiding ideology for disaster prevention and mitigation and sustainable development of urban infrastructure.The growth of uncertain risk and disaster factors is positively correlated with the development and expansion of urban areas,facilities,and population.Under this background,underground comprehensive pipe corridors,as a centralized carrier of urban material resources and information transmission,“will affect the whole body and cause risks.One point is endangering the overall situation.” Therefore,it is necessary to attach great importance to the disaster prevention construction of underground comprehensive pipeline corridors,and promote the development of underground comprehensive pipeline corridors from the incremental development model of expansion to the development of stock quality improvement.To this end,this paper introduces the concept of "resilience",combined with the PSR model to comprehensively evaluate the resilience performance of underground comprehensive pipeline corridors for disaster prevention from the time dimension.The main research contents are as follows:(1)Research on the definition of resilience of underground comprehensive pipeline gallery.Starting from the basic concept of disaster prevention for underground integrated pipe corridors,combined with the composition of the pipe corridor system and the characteristics of risk and disasters,a resilient development framework for underground integrated pipe corridors based on the PSR model is proposed,which includes three stages:pressure process,state process,and response process.The toughness characteristics of the pipe gallery at each stage are analyzed.(2)Research on resilience assessment model.Based on the analysis of resilience characteristics,combined with the characteristics of urban development,the structure of pipe corridor facilities and the characteristics of operation and management,and reference to relevant documents and standards,a resilience evaluation index system was established.Through the selection of evaluation methods,the entropy weight method,TOPSIS method,and gray correlation analysis are selected to construct the resilience evaluation model.(3)Case analysis and research.In order to show the impact of index elements on the toughness of the pipe gallery,firstly,five representative pipe gallery project cases in different regions were selected differentiated,and then a multi-level and multi-dimensional quantitative evaluation of the selected cases was carried out based on surveys and other reliable data.Finally,through horizontal project analysis and vertical index analysis,the relationship between the development trend of the index and the ductility performance of the pipe gallery is judged through two angles,and the key index factors that affect the evaluation results are explored.(4)Research on resilience improvement strategies.Based on the analysis of the results,it summarizes the toughness improvement path of the operable underground integrated pipe gallery,and integrates the existing problems in the construction and operation of the current pipe gallery,from the three levels of avoiding and defending pressure sources,improving the stability of the state,and optimizing response efficiency.A universal strategy to guide the resilient construction of underground comprehensive pipeline corridors is proposed,which provides new perspectives and ideas for the resilient construction of underground comprehensive pipeline corridors in my country. |
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