盾构隧道施工期管片开裂诱因的故障树分析方法  

Fault Tree Analysis Method for Inducing Segment Cracking During Shield Tunnel Construction

作　　者：李明宇[1,2] 杜亚林 陈健 历朋林[2,3] 杜昌言 田应飞 陈允斌 LI Mingyu;DU Yalin;CHEN Jian;LI Penglin;DU Changyan;TIAN Yingfei;CHEN Yunbin(School of Civil Engineering,Zhengzhou University,Zhengzhou 450001,China;China Railway 14th Bureau Group Co.Ltd.,Ji’nan 250101,China;China Railway 14th Bureau Group Shield Engineering Co.Ltd.,Nanjing 211899,China;Shandong Zhengyuan Construction Engineering Co.Ltd.,Ji’nan 250098,China)

机构地区：[1]郑州大学土木工程学院,郑州450001 [2]中铁十四局集团有限公司,济南250101 [3]中铁十四局集团大盾构工程有限公司,南京211899 [4]山东正元建设工程有限责任公司,济南250098

出　　处：《铁道建筑》2021年第11期70-73,共4页Railway Engineering

基　　金：国家自然科学基金(51508520);河南省重点研发与推广专项(科技攻关)(202102310586);河南省住房城乡建设科技计划(K1940,K1817)。

摘　　要：通过对文献中调查的隧道管片开裂病害和影响因素进行统计分析,利用动态故障树理论建立动态故障树评价模型,根据统计结果划分基本风险事件的风险等级,得出其发生的概率,进而算出其重要度;通过归一化处理,得出各基本风险事件的关联度,进而确定影响管片开裂的最不利因素。故障树分析结果表明:造成管片开裂影响因素权重排名前三的依次是管片间环缝压缩量不一致、管片拼装选择点位不当、盾尾密封失效。应针对影响管片开裂的风险因素,制定相应的盾构隧道管片的维修和防护措施。Through statistical analysis of the cracking diseases and influencing factors of tunnel segments investigated in the literature,a dynamic fault tree evaluation model was established based on dynamic fault tree theory,and the risk level of basic risk event was divided according to the statistical results,and the probability of occurrence was calculated,and then the importance was calculated. Through normalization,the correlation of each basic risk event was obtained,and the most unfavorable factors affecting segment cracking can be determined. The results of fault tree analysis show that the top three weights of factors causing segment cracking are inconsistent circumferential joint compression of segments,improper segment assembly selection point and shield tail seal failure. Corresponding maintenance and protection measures for shield tunnel segments shall be formulated according to the risk factors affecting segment cracking.

关 键 词：盾构隧道 管片开裂 故障树分析 评价模型 影响因素 基本风险事件 重要度 关联度 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]