ABSTRACT
The construction environment of the deep foundation pit project in the subway is complex, containing a lot of uncertain factors, and the use of a fuzzy comprehensive evaluation method in the actual deep foundation pit project is beneficial to its risk management. Taking the deep foundation pit of a station in Ningbo as an example, this paper establishes the indicator system of safety evaluation of foundation pit construction, determines the factor set and the evaluation set, empowers the factors at all levels according to the expert scoring, selects the appropriate membership function, and establishes the fuzzy comprehensive evaluation model. Through the fuzzy comprehensive evaluation of on-site monitoring data, it is determined that the foundation pit is in a safe state. The evaluation process and method provide a theoretical basis for the safe construction evaluation of the deep foundation pit in the subway and contribute to the preparation of risk control measures for the safety management of the foundation pit construction.
