The aseismic performance of shallow buried water-conveyance tunnel in soft soil area is becoming more and more important with the development of large-scale water conveyance projects.In the big diameter water-conveyance tunnel

on account of large mass and sloshing of inner water under the vibration

which will bring water-tunnel lining interaction.All the above will affect dynamic response of tunnel lining.Aiming at this problem

the paper studies water-conveyance tunnel by dynamic fluid-structure coupling method.Especially

inner water is modeled by potential-based liquid element.The numerical results show that the inner water has great effects on the frequencies and dynamic response of water-conveyance tunnels.