When the newly-built highway crosses the existing high-speed railway tunnel in a three-dimensional way, the bridge can be used to cross over the high-speed railway tunnel. Railway track with high smoothness is the fun...When the newly-built highway crosses the existing high-speed railway tunnel in a three-dimensional way, the bridge can be used to cross over the high-speed railway tunnel. Railway track with high smoothness is the fundamental guarantee for the smooth and safe operation of high-speed trains. High-speed railway track is very sensitive to displacement and deformation, and the allowable deviation limit of static geometric dimensions of ballastless track of high-speed railway is particularly strict. In order to study the influence of new highway bridge on existing high-speed railway tunnel, taking a new highway bridge crossing Shanghai-Kunming high-speed railway tunnel as an example, the influence of highway bridge construction and operation on existing high-speed railway tunnel and railway track is simulated and analyzed by ANSYS, including the displacement of high-speed railway track, tunnel structure deformation and internal force analysis. The results show that the displacement and internal force changes of the high-speed railway tunnel meet the restriction requirements, which provides a reference for similar projects adjacent to the operation of high-speed railway tunnels.展开更多
文摘When the newly-built highway crosses the existing high-speed railway tunnel in a three-dimensional way, the bridge can be used to cross over the high-speed railway tunnel. Railway track with high smoothness is the fundamental guarantee for the smooth and safe operation of high-speed trains. High-speed railway track is very sensitive to displacement and deformation, and the allowable deviation limit of static geometric dimensions of ballastless track of high-speed railway is particularly strict. In order to study the influence of new highway bridge on existing high-speed railway tunnel, taking a new highway bridge crossing Shanghai-Kunming high-speed railway tunnel as an example, the influence of highway bridge construction and operation on existing high-speed railway tunnel and railway track is simulated and analyzed by ANSYS, including the displacement of high-speed railway track, tunnel structure deformation and internal force analysis. The results show that the displacement and internal force changes of the high-speed railway tunnel meet the restriction requirements, which provides a reference for similar projects adjacent to the operation of high-speed railway tunnels.
