土压平衡盾构机在隧道施工中出现卡机事故的处理措施

Measures to Treat the Machine-blocking Accident for Tunnel Constructed by the Earth Pressure Balance Shield Boring Machine(EPB)

兰州轨道一号线隧洞在施工采用了土压平衡盾构机。当隧洞施工穿越漂卵石地层时,发生了卡机事故。文中介绍了发生卡机事故的隧洞段所遇到的地质情况,详细的卡机状况,采取的有针对性的技术措施和最终脱困的过程。

The earth pressure balance shield boring machine（ EPB） was used to construct the tunnel of the Lanzhou Metro Line one.When the excavating tunnel passed through the boulder and gravel stratum, the machine blocking accident occurred.The paper introduces the encountered geological situation of the tunnel section in which the accident appeared, the concrete machine-blocking circumstance, adopted purposeful technique measures and the process of throwing off troubles at last.