Risk analysis of tunnel shield machine driving-in and driving-out construction process in tunnelling engineering
In China, by using shielded construction in the Huangpu River underwater highroad tunnel project. Since 1966 and with ever-ascending urban subway construction in recent years, the shield construction has been extensively applied in tunnel construction for its merits, such as small impact of surface environment, wide range of application, high indemnificatory of construction quality, etc. But, the characters, as the concealment, complexity and technical difficulties of tunnel engineering, make accidents happen in the shield construction from time to tome, also being with greater probability especially in the process of shield machine driving-in and driving-out construction (Zhao, et al., 2004; Chen, et al., 2006; Cui, 2009). Tunnel construction risk analysis, which is based on the risk management theory to analyze and deal with the construction risk factors, caused the attention of numerous researchers and achieved fruitful achievements (Einstein, 1996; Vik, et al., 2000; Yoo, et al., 2003; Eskesen, et al., 2004; Zhou, et al., 2006; Li, et al., 2009). Nonetheless, specific to the process of the accident-prone shield machine driving-in and drivingout construction, although relevant researchers have studied on it (Zhao, et al., 2004; Chen, et al., 2006; Cui, 2009), the risk analysis theory is not yet perfect, and applied research on new risk analysis technique is still full of theoretical and practical value.