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Technical Brief

Full-scale measurement of micro-pressure waves in high-speed railway tunnels

[+] Author and Article Information
Feng Liu

College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Key Laboratory of Traffic Safety on Track of Ministry of Education, Central South University, Changsha 410075, China
lf198187@163.com

Jiqiang Niu

College of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China
jiqiang_niu@163.com

Jie Zhang

Key Laboratory of Traffic Safety on Track of Ministry of Education, Central South University, Changsha 410075, China
jie_csu@csu.edu.cn

Guo-xing Li

College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
liguoxing@tyut.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4041111 History: Received October 27, 2017; Revised August 05, 2018

Abstract

We aim to perform a series of field measurements for high-speed railway tunnels in China to obtain the micro-pressure wave (MPW) at the tunnel exit and the transient pressures near the tunnel portals. The relationship between the MPW and the nose-entry wave and the effects of train speed and the tunnel exit hole on the MPW are analyzed. The results show that the MPW decreases with increasing distance from the tunnel exit, but increases rapidly with increasing train speeds. Additionally, holes in the hoods near the tunnel exit could decrease the MPW near the tunnel exit by 10%-20%.

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