摘要
富水软土地层地铁车站深基坑施工难度大,施工环境复杂,安全风险高。依托广州某地铁车站深基坑工程,采用WBS-RBS(Work Breakdown Structure-Risk Breakdown Structure)法建立富水软土深基坑施工安全风险辨识的多元指标评价体系。通过资料收集和现场施工调研,将车站主体结构中的施工质量风险、监控风险、人员与设备风险、周边环境风险、自然环境风险作为一级风险指标。采用改进模糊层次分析法计算指标权重,物元可拓模型确定关联度及等级,并将各指标权重与关联度结合构建风险量化模型。研究显示,基坑施工质量风险大于周边环境风险,其中地下连续墙接缝渗漏水和坑内涌水对基坑的影响较大。根据评估结果采取措施,计算结果与实际工程相符,表明多元信息模糊可拓法可以推广应用于类似工程。
It is difficult to construct a deep foundation pit of a subway station under the condition of a water⁃rich soft soil layer,the construction environment is complex,and the safety risk is very high.Therefore,a reasonable and effective safety quantitative risk assessment is carried out for deep foundation pit construction of metro stations under a water⁃rich soft soil layer.In this paper,based on the station of Guangzhou subway deep foundation pit engineering,WBS RBS method is adopted to establish the rich water soft soil deep foundation pit construction safety risk identification index evaluation system,through the data collection and field construction of the station main body structure construction quality in the construction of risk,risk monitoring,personnel and equipment risk,surrounding environment risk,natural environmental risks as the primary risk indexes.Based on the improved fuzzy Analytic Hierarchy Process(AHP),the index weight is calculated,and the extension theory model is established to analyze the loss degree and occurrence probability and calculate the risk grade correlation degree.The risk quantitative model is constructed by combining the index weight and correlation degree.Through qualitative and quantitative analysis,the correlation degree of each risk index is calculated.Finally,the risk level of the subway station's deep foundation pit is obtained.The research results show that the quality risk of foundation pit construction is greater than the surrounding environmental risk,and the water and sand inrush in the foundation pit has a great influence on the foundation pit.According to the correlation degree of each index obtained from the evaluation results,measures can be taken to control the risk,especially for water and sand inrush in the foundation pit.The calculation results are consistent with the actual engineering situation,which proves the feasibility of this method from the side and can be applied to similar projects.
作者
吴波
夏倩
刘聪
谢运东
黄惟
WU Bo;XIA Qian;LIU Cong;XIE Yundong;HUANG Wei(School of Civil and Architectural Engineering,East China University of Technology,Nanchang 330013,China;School of Architectural Engineering,Guangzhou City Construction College,Guangzhou 510925,China;School of Architecture and Traffic Engineering,Ningbo University of Technology,Ningbo 315211,Zhejiang,China;China Railway Beijing Engineering Bureau Group Urban Rail Transit Engineering Co.,Ltd.,Hefei 230088,China;College of Quality and Safety Engineering,China Jiliang University,Hangzhou 310018,China)
出处
《安全与环境学报》
CAS
CSCD
北大核心
2024年第1期1-10,共10页
Journal of Safety and Environment
基金
国家自然科学基金项目(52168055)
江西省自然科学基金项目(20212ACB204001)
江西省“双千计划”创新领军人才项目(jxsq2020101001)。
关键词
安全工程
地铁车站施工
富水软土层
改进模糊层次分析法
可拓理论
风险评估
safety engineering
subway station construction
water⁃rich soft soil
improved fuzzy analytic hierarchy process
extension theory
risk assessment
