Abstract：
In the eastern Sichuan, there are a series of a special geological structure—partiton style anticlinals, where have built dozens of tunnels, and occurred serious great water-inrush hazards. So research the tunnel water-inrush hazard in this area is practical significance. Groundwater system is with strong nonlinear characteristics in karst, to establish the appropriate BP neural network, assessment the hazard rating of Huayingshan tunnel which is been built. The results show that: the non-soluble rock in anticline wings is evaluatedⅠ-Ⅲ level; the soluble rock in anticline core is evaluated Ⅲ-Ⅴ level, and the closer to core, the level of risk higher; risk level in west wing is higher than the east. The results is consistent with the research in investigation stage.
2011, Vol. 48 