Track Differential Settlement Model

Author:

Davis David D.1,Chrismer Steven M.2

Affiliation:

1. Transportation Technology Center, Inc., Pueblo, CO

2. LTK Engineering Services, Ambler, PA

Abstract

A study of track settlement behavior at critical transitions such as road crossings and bridge approaches has yielded a model to predict the amount of differential track settlement at these transitions caused by ballast and subgrade deformation. This AAR ballast and subgrade deformation model has been developed from field and laboratory test data, and has been validated with field settlement measurements at bridge approaches where the ballast and subgrade properties were well documented. As an analytical tool the model can determine the rate of track differential settlement at transitions with traffic loading and to predict when tamping is required to correct track geometry. Also the model can determine the relative amount of deformation from the individual ballast and subgrade layers. These capabilities provide a means to assess whether the main source of deformation is the subgrade or the ballast and the best means to reduce differential settlement and decrease the frequency of tamping at these track transitions.

Publisher

ASMEDC

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Advances in research on the ballast bed stability on railway bridges;Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit;2024-08-13

2. A Method for Using Transformed Track Deflection Data to Assess Dynamic Forces at Railway Track Stiffness Transitions;Transportation Infrastructure Geotechnology;2023-01-24

3. Numerical evaluation of approach slab influence on transition zone behavior in high-speed railway track;Transportation Geotechnics;2021-05

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