基于二维云模型的深基坑施工风险评价方法
Risk Assessment Method of Deep Foundation Pit Construction Based on Two-Dimensional Cloud Model
黄震 1曹琛 2张薇 2马少坤1
作者信息
- 1. 广西大学 土木工程与建筑学院,广西 南宁 530004;广西大学 防灾与结构安全重点实验室,广西 南宁 530004
- 2. 广西大学 土木工程与建筑学院,广西 南宁 530004
- 折叠
摘要
为兼顾深基坑施工风险评估中涉及的模糊和随机不确定性,提出了基于二维云模型和3En规则的深基坑施工风险评价方法.首先,辨识了深基坑施工风险源,建立了多因素施工风险评价指标体系;其次,根据工程情况采用德尔菲法初步判定评价指标重要性,采用层次分析法和熵权法确定评价指标的主客观权重,获得综合权重;然后,根据风险评价准则和正向云发生器生成二维标准云和综合云;最后,利用云模型的3En规则和综合云云滴分布概率,快速判断风险等级的隶属度.运用提出的风险评价方法预测了南宁市某深基坑工程施工风险等级,与传统模糊综合风险评价方法对比,该评价方法具有可靠性.
Abstract
In order to take into account the fuzzy and random uncertainty involved in risk assessment of deep foundation pit construction,a risk assessment method for deep foundation pit construction based on two-dimensional cloud model and 3En rule is proposed.Firstly,the risk sources of deep foundation pit construction are identified,and the construction risk assessment index system composed of risk factors is established.Secondly,based on the engineering situation,the Delphi method is used to preliminary determine.Furthermore,the subjective and objective weights of the assessment indexes are determined by the analytic hierarchy process and entropy weight method,and the comprehensive weights are obtained.Then,the two-dimensional standard cloud and synthesized cloud are generated according to the risk assessment criteria and the forward cloud generator.Finally,the 3En rule of the cloud model and the distribution probability of synthesized cloud droplets are used to judge the risk level membership.The proposed risk assessment method is applied to predict the construction risk level of a deep foundation pit project in Nanning city.Compared with the traditional fuzzy comprehensive risk assessment method,the reliability of the assessment method is verified.
关键词
基坑工程/风险评价/云模型/不确定性分析/指标体系Key words
foundation pit engineering/risk assessment/cloud model/uncertainty analysis/index system引用本文复制引用
出版年
2024
NETL
NSTL
万方数据