Experimental and numerical study on lateral and longitudinal resistance of ballasted track with nailed sleeper

Journal article (2021)

Authors

Y. Guo Railway Engineering - CEG
Lu Zong Beijing Jiaotong University
V.L. Markine Railway Engineering - CEG
Xinyu Wang Beijing Jiaotong University
Guoqing Jing Beijing Jiaotong University
Research Group
Railway Engineering (CEG) (TU Delft)
Copyright: © 2021 Y. Guo, Lu Zong, V.L. Markine, Xinyu Wang, Guoqing Jing
DOI
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https://doi.org/10.1080/23248378.2021.1872424
DEM Lateral resistance Ballasted track Longitudinal resistance Nailed sleeper Track stability
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Published Date

2021

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Engineering Structures

Research Group

Railway Engineering

Abstract

Lateral and longitudinal resistance of ballasted track are two main indicators for the track stability quantification. Aiming at improving the lateral and longitudinal resistance, nailed sleeper is studied with single sleeper push tests (SSPTs) and discrete element modelling (DEM). The SSPTs were applied to study how much resistance the nailed sleeper can improve, considering different nail lengths (100, 200, 400 mm), and also used to calibrate and validate the DEM models. With the validated DEM models, different simulation conditions were performed and compared to confirm the optimal nail length (100, 200 mm) and nail number (2, 4). Results show that applying nailed sleepers improves the lateral resistance by 53.7% and the longitudinal resistance by 39.2%. 4 nails, compared to 2 nails, can increase lateral and longitudinal resistance by 20.2% and 10.6% (nail length: 100 mm) as well as 37.0% and 33.5% (nail length: 200 mm), respectively.