A Study on the Train-Induced Vibration Responses of Heavy Haul Railway Subgrade in Seasonally Frozen Regions Using Field Experiments

Yu-Zhi Zhang (), Ya-Qian Dong, Xiu-Xiu Cao and Pei Li
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Yu-Zhi Zhang: Key Laboratory for Health Monitoring and Control of Large Structures in Hebei Province, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
Ya-Qian Dong: School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
Xiu-Xiu Cao: School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
Pei Li: Geotechnical and Underground Engineering Research Institute, Beijing University of Technology, Beijing 100124, China

Sustainability, 2022, vol. 14, issue 23, 1-19

Abstract: The dynamic response resulting from heavy haul train leads to the deterioration of the railway subgrade, especially those built in seasonally frozen regions. In this work, a typical heavy haul railway section in a seasonally frozen region is monitored on-site. The time domain and the frequency domain analysis of the subgrade vertical vibration acceleration, dynamic speed, and displacement during the non-frozen period and the frozen period are investigated. The results show that the vibration response of the subgrade is affected by various factors, including the train type, locomotive, traveling speed, train formation, heavy load, and the prevalent season. Further, it is observed that the maximum and average vertical acceleration of the subgrade, the vibration speed, and the dynamic displacement increase during the frozen period. However, the main frequency of the natural vibration remains significantly higher than that before freezing. Moreover, the frozen soil has a significant amplification effect both on the acceleration and the attenuation rate. Similarly, the subgrade’s vibration mode has a low frequency and high amplitude during the freezing period, and the dynamic response characteristics become increasingly apparent as the axle load increases.

Keywords: seasonally frozen region; heavy haul railway subgrade; dynamic response; vibration acceleration; on-site monitoring (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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