Study on Extension Evaluation of Construction Risk of Metro Foundation Pit Based on Measured Data

In order to evaluate the construction risk of foundation pit engineering effectively, this paper adopts the evaluation method which combines the weight of ordered weighted operator and matter element extension model on the basis of constructing the risk evaluation index system, by calculating the correlation degree and the grade characteristic value between the matter element to be evaluated and the evaluation grade, the risk grade of foundation pit construction is evaluated quantitatively, which improves the objectivity of the risk evaluation, the example analysis shows that the application of ordered weighted operator and matter element analysis method to the risk assessment of foundation pit construction stage is feasible and practical.