Risk management is an important part in tunnel construction management. There are many factors to influence the tunnel risk. For different tunnel, its risk types and risk sizes are very different in thousand and one ways. Red clay is expansive clay. The identification of construction risk has been studied in this paper by system analysis method for the red clay tunnel. The qualitative and quantitative analysis of risk factors is also analyzed at the same time. The result can be used to control the construction risk of tunnel.
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