Research on Low-Carbon Construction Evaluation of Railway Tunnels Based on G2-CRITIC-UMT Model
The key to promoting the low-carbon transformation of the whole life cycle of railway construction is to develop the low-carbon concept based on railway construction.Taking carbon emission evaluation as the starting point,with four representative first-level indicators and 11 important influencing factors selected based on the principles of integrity and operability,to establish a low-carbon construction evaluation index system,this paper selects G2 method and CRITIC method to calculate subjective and objective weights,constructs an unascertained measure theory evaluation model,and uses the confidence recognition criterion to identify the grade and evaluates the carbon emission of low-carbon construction of 8 typical tunnel sections in Guangzhou-Shanwei Railway.The results show that the reclamation rate of waste slag yard,the degree of soil erosion protection,the standard discharge rate of wastewater,the localization rate of construction materials and other indicators will greatly affect the low-carbon construction effects of railway tunnels.The low-carbon construction of 5 tunnels is calculated as grade Ⅱ,and the low-carbon construction of 3 tunnels is as grade Ⅲ.Through demonstration,the evaluation results of G2-CRITIC-UMT model are more accurate than those of BP neural network model,and the degree of conformity with the actual situation is increased from 62.5%to 87.5%,which verifies the accuracy of the model and provides new ideas for the evaluation of low-carbon construction of railway tunnels.
railway tunnellow-carbon constructionG2 methodCRITIC methodunascertained measure theory
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