Optimization of window pattern for an entrance hood installed at the portal of a long slab-track tunnel

NDL Digital Collections

Bibliographic Information

Other Title
  • 長大スラブ軌道トンネルの緩衝工開口部の最適化(波動(1),一般講演)

Search this article

Description

Tunnel entrance hoods have been installed at many portals of Shinkansen tunnels for reducing micro-pressure wave. It is necessary to reduce the maximum value of the pressure gradient of the compression wave at tunnel exit for reducing the micro-pressure wave because it is approximately proportional to the micro-pressure wave. Recently two types of simulation methods have been developed independently: one for prediction of a compression wave generated by a train entering a tunnel with an entrance hood and the other for prediction of a distortion process of the compression wave propagating through the tunnel. Combining the two methods can predict an optimum window pattern of the hood to minimize the maximum value of the pressure gradient at long tunnel exit with due consideration for distortion process of the compression wave. Results of the field test described in this paper clarify the optimum window pattern of the hood predicted by this combined technique for minimizing the micro-pressure wave.

Journal

Details 詳細情報について

Report a problem

Back to top