Abstract:109 tunnels with lining cracks were summarized, and characteristic distribution laws of lining cracks and statistical probabilities of factors causing lining cracks were attained; the fault tree model of lining cracks was established based on identification of risk sources; furthermore, the main disease inducing channels were obtained by grey relational analysis. In the analysis process, in order to get reliable probabilities of bottom events, the method to combine statistical probability and investigation probability by experts was proposed. The research results show that the asymmetric load, voids behind lining, water leakage, loosely pressure and uneven settlement are main disaster inducing channels for lining cracks.
