Study on the identification of"subgrade-environment"green key elements in mountain railway engineering
To promote the coordinated development of green and high quality between railway subgrade engineering and the environment in mountainous areas and respond to the call for a national sustainable strategy and double carbon target,a method of coupling relationship analysis and key elements determination of railway"subgrade-environment"is proposed.Firstly,by constructing the"subgrade-environment"interaction network,the barrel theory is introduced to construct the green factor index system of railway subgrade engineering,"subgrade-environment"interface layer,and environment.Secondly,the system coupling model is used to measure the coupling coordination degree of the system and evaluate the combination state.The green coordination status of the railway subgrade and the environment is analyzed to promote their evolution to the trend of green quality coordination.Then,with the help of complex network theory,the elements are taken as nodes,and the influence intensity between elements is taken as edges to form a multi-layer complex correlation network of coordination,influence,and diffusion.The coupling strength of multi-layer network elements is determined by the combination of Spearman and the two-dimensional cloud model.The green coordination index is introduced and the key element set of railway"subgrade-environment"is determined by a node deletion method.Finally,taking a mountain railway subgrade as an example,it is concluded that the coupling coordination state between the railway subgrade and the environment is between bare coordination and primary coordination,and the green coordination state is poor.The four key elements of vegetation protection of subgrade slope,excavation size of cutting,embankment filling size,and engineering protection of subgrade slope should be managed emphatically.The case study verifies the applicability and effectiveness of the model,which provides a key management goal for obtaining the greening of railway subgrade engineering in mountainous areas,and also promotes the transformation of railway subgrade engineering construction in China to a green and efficient mode.
environmentalologysubgrade engineeringwooden barrel modelsystem couplingcomplex networkskey elements
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