基于改进层次分析法、熵权法的深基坑施工风险评估

Risk Evaluation of Deep Foundation Pit Construction Based on Improved Analytic Hierarchy Process and Entropy Method

为了对深基坑施工风险进行评估,分别通过改进层次分析法、熵权法、组合赋权法计算基坑施工的风险因素权重.通过权重将事故发生的可能性及其严重程度定量表示出来,并用模糊数学综合评估方法对基坑开挖过程的风险进行整体评估,定量确定深基坑总体风险等级.以济南某轨道交通深基坑施工为例分析表明:提出的组合赋权方法相对于主客观方法更全面,综合考虑了主客观,可为深基坑施工风险评估提供参考,为风险应对提供依据.

In order to evaluate the construction risk of deep foundation pits,the weights of risk factors of foundation pit construction are calculated by improved analytic hierarchy process,entropy weight method,and combined weighting method.The possibility of accidents and their severity are quantitatively expressed through weights,and the overall risk of the excavation process of the foundation pit is assessed by the comprehensive evaluation method of fuzzy mathematics,and the overall risk level of the deep foundation pit is quantitatively determined.Taking the construction of a deep foundation pit for a rail transit in Jinan as an example:The combined weighting method proposed in this paper is more comprehensive than the subjective and objective methods.This method considers subjective and objective comprehensively,and can provide reference for risk assessment of deep foundation pit construction and provide basis for risk response.