Abstract
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.
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