基坑失稳风险综合评价方法  

Comprehensive evaluation method of instability risk for foundation pit

作　　者：程涛 孙学军[1,2] 李有贵 刘顺青 杨宗霖 CHENG Tao;SUN Xuejun;LI Yougui;LIU Shunqing;YANG Zonglin(Anhui Road&Bridge Engineering Group Co.Ltd.,Hefei 230031,China;Anhui Construction Engineering Group Co.Ltd.,Hefei 230031,China;Jiangsu University of Science and Technology,Zhenjiang 212005,China)

机构地区：[1]安徽省公路桥梁工程有限公司,安徽合肥230031 [2]安徽建工集团股份有限公司,安徽合肥230031 [3]江苏科技大学,江苏镇江212005

出　　处：《现代交通与冶金材料》2021年第6期17-22,共6页Modern Transportation and Metallurgical Materials

基　　金：住建部2015年科学技术项目计划(2015-K4-027);安徽省博士后基金资助项目(2016B085)。

摘　　要：基坑工程在施工过程中存在较多的经济技术风险,包括:基坑整体稳定破坏风险、支护结构倾覆破坏风险、基坑底隆起破坏风险、基坑底冒水破坏风险,很难用一定值来确定。因此,根据模糊概率理论对权重进行修正,根据确信程度选取合适的隶属函数用于获得主要影响因子的隶属度大小,从而获得各稳定等级的模糊概率;基于信息熵理论建立可反映专家评价水平的风险后果评价方法;由风险事件权重、风险事件的风险后果、风险事件的发生概率获得基坑失稳的总体风险,从而获得基于模糊理论及熵理论的基坑风险综合评价方法。最后,通过该方法获得合肥市花园宾馆基坑失稳的总体风险为3.64,风险等级为2级,需对基坑进行监测,但无需采取风险处理措施。Foundation pit engineering has many economic and technological risks in the construction process,including:stability of foundation pit retaining structure damage risk,overturning failure risk,the bottom of the foundation pit uplift failure risk,pit bottom water damage risk,it is difficult to use a certain value to identify them.Therefore,weight is modified based on the theory of fuzzy probability,membership size of the main influencing factors is obtained according to the appropriate membership functions,the fuzzy probability of the stable level is gained;the evaluation method for the risk consequence is formulated based on information entropy theory;the overall risk of instability of foundation pit is obtained from the risk events weight,the risk consequences of risk events,the probability of risk events,for which is based on fuzzy theory and entropy theory of foundation pit risk comprehensive evaluation method.Finally,the risk of whole instability for foundation pit of Hefei Garden Hotel by this method is 3.64,the risk level is level 2,and foundation pit must be monitored,but no need for risk treatment measures.

关 键 词：基坑工程 风险评估 模糊理论 熵理论 

分 类 号：TU433[建筑科学—岩土工程] TU473.2[建筑科学—土工工程]