Impact of Increased Linings on Pressure Transients Induced by a Train Passing through a Tunnel

Complex pressure transients are generated as a train passes through a tunnel, thereby affecting passenger comfort and the surroundings. Increased lining technology, as an effective method to handle tunnel damage, adds concrete with a certain thickness to the surface of the original lining. This changes the cross section of a tunnel and affects pressure transients. Herein, by combining numerical simulation methods and moving model experiments, the effect of different increased linings on the pressure transients is studied. The results show that a new lining installed at a tunnel entrance affects the pressure transient more significantly than a lining installed in the middle. Further, the pressure amplitude increases with the thickness of the new lining. When the thickness of the new lining is 0.5 m, the maximum change rates of the pressure amplitudes of the train and the tunnel are as high as 9.21% and 15.87%, respectively.

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  • English

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  • Accession Number: 01692116
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 6 2018 3:11PM