Wave effects in a realistic tunnel induced by the passage of high-speed trains
Journal article, 2019

As a high-speed train passes through a tunnel, aerodynamic pressure waves propagate backwards and forward in the tunnel, and they persist for a long time after the train is gone. Understanding the aerodynamic characteristics influenced by various factors on a tunnel is essential for ensuring the safety of tunnel structures. Field measurements were conducted in a 2812 m-long tunnel to systematically investigate the pressure characteristics during the passage of CRH2-150C and CRH380AL high-speed trains through the tunnel, both in single-train and intersecting cases. The results reveal that as the train speed increases, the location of the maximum peak-to-peak pressure variation shifts toward the tunnel entrance, mainly driven by the change in the negative pressure peak. The train length induces significant differences in peak pressures on the tunnel wall in the middle of the tunnel, and a long train brings more massive subsequent pressure waves than a short train in the post-train stage, but they decay faster. The intersection of two trains in the tunnel not only causes a significant change in the peak pressure and its location, but also has a significant effect on damage factor (the damage level on a structure subjected to a specific load) after train leaving the tunnel, with a 65.3% of this factor during trains operating in the tunnel.

High-speed railway tunnel

Field measurement

Damage factor

Wave effect

Post-train stage

Author

Tanghong Liu

National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle

Central South University

Chalmers, Mechanics and Maritime Sciences, Fluid Dynamics

Joint International Research Laboratory of Key Technology for Rail Traffic Safety

Zhen hua Jiang

National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle

Central South University

Joint International Research Laboratory of Key Technology for Rail Traffic Safety

Xiao dong Chen

University of Manchester

Jie Zhang

Chalmers, Mechanics and Maritime Sciences, Fluid Dynamics

Xifeng Liang

Central South University

National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle

Joint International Research Laboratory of Key Technology for Rail Traffic Safety

Tunnelling and Underground Space Technology

0886-7798 (ISSN)

Vol. 86 224-235

Subject Categories

Physiology

Vehicle Engineering

DOI

10.1016/j.tust.2019.01.023

More information

Latest update

2/19/2019