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  A study on the optimum cross section design for single track double bored tunnels in high speed railway

  This paper describes determination of tunnel cross section that considers the aerodynamic problems and the railway requirements at very long tunnel such as subsea tunnel (single track double bored tunnels, train sealing 18, train velocity 350 km/hr, tunnel length 50km). As a result, the required cross-section areas with or without the pressure reduction damper are 39 m and 47 m from an air pressure aspect. But the required cross-section area considered the space of railway facilities installation such as the space of catenary installation, structure guage, etc. is calculated 57.25 m (section width, 8.9 m). So, it is determined that the application of 57.25 m is satisfy the required cross-sectional area of the tunnel.

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