Improvement of LEC Risk Analysis Method and Its Application in Tunnel Construction

LEC method is now commonly used risk analysis method,but this method is too subjective in the risk occurrence probability making.Aimed at this defect,this paper improves the subjective marking-making of risk occurrence probability to the two factors,"system intrinsic energy" and "artificial control energy".Finally,this paper applies the improved model to the safety risk occurrence probability of tunnel construction of a highway project and has achieved good results.