复合式土压平衡盾构刀盘失效风险分析

通过对复合式土压平衡盾构刀盘失效的事故种类及原因的分析与总结，应用故障树分析（FTA）方法对刀盘失效风险进行了研究，建立了刀盘面板、刀具和其他刀盘体系的故障树系统模型。通过定性与定量分析，讨论了各项风险事故的潜在失效模式和影响因素。结合具体工程进行了应用，并提出了针对性的控制措施。研究有助于复合式土压平衡盾构刀盘的设计、施工的决策与控制。

Risk analysis of cutter head failure of composite EPB shield

All kinds of accident examples and their potential reasons are analyzed and summarized for cutter head failure of composite earth pressure balance (EPB) shield. In order to research the mechanism of the failure mode on cutter disc, cutters and other different cutting components in composite EPB shield machine, fault tree analysis (FTA) is applied to establishing an analytical model on cutter head failure. Firstly, potential failure modes and effect factors of different failures are all analyzed and calculated by set theory in qualitative and quantitative methods. Then, relevant control measures are proposed to reduce the cutter head failure of composite EPB shield. The results will be useful for cutter head design and construction by composite EPB shield in China.