State-of-the-Art of the Research on Risk Management in Construction of Tunnel and Underground Works

Strong and numerous risks will be encountered in the construction of tunnel and underground works due to its complicated factors.Increasing attention to risk management researchon this field and applications is being paid in recent ten years.In this paper several topics are discussed,such as the definition of the risk,mechanism of the risk,present research works and their level,main questions in risk management application and the possible research fields.