Abstract Transient pressure changes induced by trains passing through tunnels have a significant influence on the structural safety of tunnels. A verified numerical method was employed in this study to explore the influence of the tunnel cross-sectional shapes with the same blockage ratio on the change in surface pressure of the tunnel. The results show that the difference mainly appears in the region affected by friction as the train enters the tunnel. The longer the cross-sectional perimeter, the larger is the positive pressure peak value. The tunnel shape has a greater influence on the negative pressure peak value, which is directly related to the distance between the train surface and the tunnel inner face. Considering the magnitude of the pressure change on the tunnel surface, a circular (C-type) tunnel with a smaller cross-sectional perimeter and aspect ratio close to 1 is better than the rectangular (R-type) and horseshoe (H-type) tunnels, which is recommended for engineering applications.

中文翻译：

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隧道断面形状对地铁列车通过引起地表压力变化的影响

摘要 列车通过隧道引起的瞬态压力变化对隧道结构安全具有重要影响。本研究采用经过验证的数值方法，探讨了具有相同堵塞比的隧道断面形状对隧道表面压力变化的影响。结果表明，差异主要出现在列车进入隧道时受摩擦影响的区域。横截面周长越长，正压峰值越大。隧道形状对负压峰值的影响较大，与列车表面与隧道内面的距离直接相关。考虑隧道表面压力变化的大小，