To explore the influence of creep pressure on supporting performance of inverted arch structure of different types of tunnels, a model of lining with invert arch pressure was established based on a tunnel in Guangyuan section of Xicheng High-speed Railway. The variation rules of lining safety factor with the weakening of structural parameters were analyzed. Results show that the bearing capacity decreases rapidly with the decrease of the concrete thickness. Also, with the increase of the arch radius, it’s supporting capacity will also weaken to a certain extent. When the thickness of concrete is cut down to 45 cm and radius to 17 m, the lining safety factor will be reduced by 47.1%, and becomes unsafe. In the end, several preventive and disposal measures are put forward to provide reference for similar projects in view of this kind of tunnel diseases.

CICTP