By 2020, 54.5% of people chose to travel by subway, an increase of 46.5% during this period. The experimental results of this paper show that in 2015 about 8% of people chose to travel by subway. This paper proposes a fuzzy comprehensive evaluation method based on fuzzy logic, which is a reasonable method for the classic evaluation index. The purpose of this paper is to study how to evaluate and analyze the economy of the deep foundation pit envelope structure of subway stations based on fuzzy logic, so as to choose the optimal and most economical plan. The construction of subway stations has developed into an inevitable trend in the future construction engineering industry, and it is also necessary to select the best solution from various solutions. There is a serious shortage of land resources, and people's demand for underground space is increasing day by day. Since the 1990s, with the continuous advancement of urbanization, the proportion of urban population has gradually increased.
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