Dynamics issues regarding high-speed railway crossing tunnels

In this paper, key dynamics problems regarding crossing tunnels on high-speed railways are presented based on their classification and combination, and the current state and existing problems of research on train vibration, aerodynamic effects, seismic shock, etc. are summarized. This study indicates that future research should focus on the following: 1) a quantitative safety assessment using a 3D train-track-crossing tunnel model and considering the strata parameters and the structures of the cross-linked tunnels; 2) train-tunnel aerodynamic research for providing safe construction measures and tunnel safety assessments under the superposition of aerodynamic load and other loads; 3) seismic response research for providing the dynamic characteristics of crossing tunnels and relevant aseismic design schemes; and 4) the establishment of a calculation model considering rock dynamic damage and its constitutive relationship with concrete. ©, 2015, Editorial Office of Modern Tunnelling Technology. All right reserved.