Study on Seismic Damage Risk Assessment of Mountain Tunnel Based on the Extension Theory

In this paper, the extension method is applied to assessment of seismic damage risk in mountain tunnels. Based on various considerations such as geological conditions tunnel site, state tunnel, structural situation and earthquake, index for mountainous tunnels proposed. The range values different indexes under each grade quantified. divided into four classes, assessed based theory. specific process follows: Firstly, five affected by Wenchuan earthquake were selected construct matter element be assessed, classical domain nodal domain; then, entropy weight analytical hierarchy (AHP) used determine weights index; finally, correlation function calculated obtain level Among them, Longchi Longxi “high risk”, Longdongzi Youyi Maanshi “moderate risk”. are sorted according eigenvalues > tunnel. Combined with investigation actual consistent results, which verifies accuracy effectiveness method. model proposed paper has certain reference value future