城市地下大空间多因素耦合的施工风险研究  

Research on Construction Risks of Urban Underground Project with Multiple Factors Coupling

作　　者：李小雪 谭忠盛[1] 雷可[1] 丁勇 LI Xiao-xue;TAN Zhong-sheng;LEI Ke;DING Yong(Key Laboratory of Urban Underground Engineering of Ministry of Education,Beijing Jiaotong University,Beijing 100044,China;Powerchina HEBEI Electric Power Engineering Co.Ltd.,Shijiazhuang 050031,China)

机构地区：[1]北京交通大学城市地下工程教育部重点实验室,北京市100044 [2]中国电建集团河北省电力勘测设计研究院,石家庄市050031

出　　处：《公路》2021年第12期217-226,共10页Highway

基　　金：国家重点研发计划,项目编号2018YFC0808701。

摘　　要：针对城市地下大空间施工风险因素多样性、风险因素耦合作用复杂的问题,提出了风险多因素耦合的概念。首先,在安全风险系统概念模型的基础上,对其进行拓充建立了安全风险系统量化模型,用以定量计算失效点的出现概率。其次,以风险因素耦合效应对系统整体风险水平的影响程度为参照,给出风险因素耦合系数来度量各因素耦合程度的大小。以广州南站地铁站深基坑工程为依托,通过数值设计试验研究了深大基坑施工风险因素的耦合效应,结果表明风险因素的耦合对系统整体安全风险多为正向影响,且部分因素间的耦合效应甚至可能将局部系统风险放大至2倍以上。研究成果可以为城市地下大空间多因素耦合的施工风险分析提供一定的参考。In view of the diversity and complex coupling effect of risk factors in the construction of urban underground project, the concept of risk multiple factors coupling is proposed. Firstly, based on the conceptual model of safety risk system, the quantitative model of safety risk system is established to calculate the probability of failure point quantitatively. Secondly, according to the influence degree of risk factors coupling effect on the system overall risk, the coupling coefficient of risk factors is given to measure the coupling degree of each factor. Based on the deep foundation pit project of Guangzhou South Subway Station, the coupling effect of risk factors in deep foundation pit construction is studied through numerical design experiments. The results show that risk factors coupling effect has a positive impact on the system overall security risk, and the coupling effect of some factors may even enlarge local system risk to more than 2 times. The research results can provide some reference for the construction risk analysis of urban underground project with multiple factors coupling.

关 键 词：地铁车站 深基坑 施工风险 多因素耦合 安全风险量化模型 风险因素耦合系数 

分 类 号：X913.2[环境科学与工程—安全科学] U231.4[交通运输工程—道路与铁道工程]