Abstract：Xiamen subsea tunnel is the longest one which is under construction in China at present. The tunnel and its connection projects are located in Xiamen，Fujian Province. Tidal phenomenon is multiple in this region，and the hydrological condition is complex. The maximum tidal range is 6.92 m in the past years，and the annual average tidal range is 4.01 m. The effects of the tide should be considered when numerical simulations are conducted. Using the monitoring data from the Research Centre of Ocean Engineering，considering the fatigue damage process of lining during tide changes，the influence of tidal load on the stabilities of lining and surrounding rock under hydro-mechanical coupling are analyzed by finite element method. The conclusion will benefit for future subsea tunnel design and practice.
