Abstract
The behavior of tunnel lining versus the pressure fluctuations in the tunnel induced by a high speed train at over 500km/h was investigated in this study to realize the rational tunnel lining structure. Fullscaled measurements of the tunnel pressure and the concrete strain were conducted, in the Yamanashi Maglev Test Line, to comprehend the strength on the tunnel lining structure under the pressure fluctuations. Firstly, FEM based numerical model for the stress of tunnel lining were developed considering the drain material around the outer concrete lining and its validity was confirmed in comparison with the data obtained from the full-scaled measurements. Secondly, the stress versus the maximum set of pressure fluctuation, which was estimated as the design load of tunnel lining structure, was examined. Furthermore, the accumulated fatigue damage of the lining concrete over lifetime was evaluated based on the number of the pressure loading cycle derived from the maglev train oeration plan.
