The setting of tunnel linings is an effective way to reparation tunnel damage, which can also improve the tunnel surface structure. However, increased linings will change the cross-sectional area of the tunnel, affecting the pressure transients induced by the train passing through the tunnel. In this study, the non-circular linings' influence on the pressure transients is analyzed based on moving model tests. Six distribution modes of the non-circular linings inside the tunnel are adopted for the experimental test. The characteristics of pressure transients induced by a single train passing through a tunnel are discussed and compared with the configuration without lining. The results of this experiment show that the influence of the non-circular linings distribution along the circumferential direction and the length direction is significant to a certain extent, which can guide the design of tunnel lining. These findings suggest that it is feasible to install non-circular lining in the tunnel to maintain tunnel damage, and reasonable distribution of the non-circular lining can also reduce the pressure amplitude of the initial compression wave.

隧道衬砌的设置是修复隧道破坏的有效方法，也可以改善隧道的表面结构。但是，增加的衬里会改变隧道的横截面积，从而影响列车通过隧道时引起的压力瞬变。在这项研究中，基于运动模型测试分析了非圆形衬砌对压力瞬变的影响。试验采用了隧道内非圆形衬砌的六种分布方式。讨论了由单列列车通过隧道引起的压力瞬变特性，并将其与无衬砌的配置进行了比较。实验结果表明，非圆形衬砌分布沿周向和长度方向的影响在一定程度上是有意义的，可以指导隧道衬砌的设计。这些发现表明，在隧道内安装非圆形衬砌以维持隧道破坏是可行的，非圆形衬砌的合理分布还可以减小初始压缩波的压力幅值。