地铁隧道施工盾构刀盘失效风险分析

发布时间：2018-04-09 11:19

本文选题：地铁隧道施工　切入点：盾构刀盘失效　出处：《中国安全科学学报》2014年07期

【摘要】：为有效分析地铁隧道施工过程中出现盾构刀盘失效的风险,解决故障数据缺乏和故障状态不确定等问题,采用T-S模糊故障树方法,建立盾构刀盘失效分析模型。用梯形模糊数来描述故障概率和故障程度,用T-S门来描述事件间的不确定联系,以此表征故障机理和事件联系的模糊性。然后运用T-S门算法计算盾构刀盘失效概率,结合关键重要度进行致险因素敏感性分析,以辨识关键致险因素。最后,用工程实例来验证模型的实用性。结果表明:T-S故障树分析法能解决传统故障树无法精确描述部件间的联系问题,可有效拓展传统分析方法;刀圈断裂、地质因素、施工参数不合理、刀具选型不合理、密封件失效和轴承失效是导致盾构刀盘失效的主要因素。
[Abstract]:In order to effectively analyze the risk of shield cutter head failure in subway tunnel construction and solve the problems such as lack of fault data and uncertainty of fault state, T-S fuzzy fault tree method is used to establish the shield cutter head failure analysis model.The fault probability and fault degree are described by trapezoid fuzzy number, and the uncertain relation between events is described by T-S gate, so as to characterize the fuzziness of fault mechanism and event relationship.Then T-S gate algorithm is used to calculate the failure probability of shield cutter head and the sensitivity of risk factors is analyzed in combination with critical importance in order to identify the key risk factors.Finally, an engineering example is used to verify the practicability of the model.The results show that the fault tree analysis method can solve the problem that the traditional fault tree can not accurately describe the relationship between components, and can effectively extend the traditional analysis methods, such as cutter ring fracture, geological factors, unreasonable construction parameters, unreasonable tool selection, etc.Seal failure and bearing failure are the main factors leading to shield cutter head failure.
【作者单位】：华中科技大学土木工程与力学学院;
【基金】：国家自然科学基金资助(51378235) 武汉市城建计划项目(201208)
【分类号】：U231.3;U455.39

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