Non-contact measurement of vertical deflections of rail trackbeds and performance testing of stabilized sub-ballasts using a novel micropiling system

Koohyar Faizi, Paul Beetham, Rolands Kromanis, John Allsop

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)
10 Downloads (Pure)

Abstract

Trackbed stabilization (TBS) refers to engineering works to improve the railway trackbed stiffness in areas affected by poor load bearing capacity from soft subgrade. There are a variety of TBS techniques available to improve soft subgrades; however, many conventional approaches require a full renewal of the ballast which is disruptive and requires lengthy track possession time. This paper documents the improvements of a soft subgrade site in the UK using micropiles, installed between sleepers during overnight possession methods, thus allowing daytime rail traffic to run as normal. A non-contact vision-based monitoring (VBM) system developed by the authors and consisting of a high-speed camera was used to quantify the track bed deflection before and after the remedial works. The VBM system records displacement-Time response of the rail and its foundation system during train passage. The results obtained from the experiments indicate that the post-rehabilitation trackbed modulus was increased.

Original languageEnglish
Title of host publicationGeo-Congress 2023
Subtitle of host publicationSoil Improvement, Geoenvironmental, and Sustainability
EditorsEllen Rathje, Brina M. Montoya, Mark H. Wayne
PublisherAmerican Society of Civil Engineers
Pages539-548
Number of pages10
EditionGSP 339
ISBN (Electronic)9780784484661
DOIs
Publication statusPublished - 23 Mar 2023
Event2023 Geo-Congress: Sustainable Infrastructure Solutions from the Ground Up - Los Angeles, United States
Duration: 26 Mar 202329 Mar 2023

Publication series

NameGeotechnical Special Publication
PublisherASCE
NumberGSP 339
Volume2023
ISSN (Print)0895-0563

Conference

Conference2023 Geo-Congress
Country/TerritoryUnited States
CityLos Angeles
Period26/03/2329/03/23

Keywords

  • 2024 OA procedure

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