Research On Risk Assessment Of Deep Foundation Pit Construction Engineering Based On Cov-AHP And Cloud Model

As the deep foundation pit accidents increase year by year,in order to prevent accidents effectively,more and more research are on the risk assessment of deep foundation pit construction engineering,but the vast methods require subjective scoring to determine the weight and ignore ambiguity and randomness of the risk factors in the risk assessment.The method proposed in this paper will solve this problem effectively.Based on this,the risk assessment model of Cov-AHP and Cloud Model is proposed.Based on the principle of system engineering,this paper made statistics and analysis on typical accidents in deep foundation pit construction engineering.The risk source identification is carried out from five aspects: personnel factor,material factor,environmental factor,management factor and technical factor,and the index system of risk assessment is determined.The weight of evaluation index is calculated by Cov-AHP;this method changes the subjective weight to the objective weight,which solves subjective determination of weights.With Cloud model theory applied,the reverse cloud generator is used to produce the digital characteristics of the risk cloud;Matlab software is used to program the forward cloud generator.The forward cloud generator is used to produce comparison chart on the risk cloud and the standard cloud,showing the risk status of the overall project and the evaluation indicators at all levels.Taking a deep foundation pit as the engineering background,the result shows that the risk level of the deep foundation pit is acceptable,but the supervision and management should be strengthened,which is consistent with the actual situation of the project.Indicating that the risk assessment method based on the Cov-AHP and Cloud model has good scientificity and practicality.