ETD system

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Tesi etd-11192013-100952


Thesis type
Tesi di laurea specialistica
Author
BIANCHI, RAMON
email address
ramonne@hotmail.it
URN
etd-11192013-100952
Title
Analysis of track performance over innovative trackbed treatments in transition zones
Struttura
INGEGNERIA DELL'ENERGIA, DEI SISTEMI, DEL TERRITORIO E DELLE COSTRUZIONI
Corso di studi
INGEGNERIA IDRAULICA, DEI TRASPORTI E DEL TERRITORIO
Commissione
relatore Prof. Losa, Massimo
relatore Dott. Brough, Matthew
relatore Dott. Sharpe, Phil
Parole chiave
  • trackbed
  • reinforcement
  • transition
  • track
  • ground improvement
  • micropiles
  • railway
  • geogrids
Data inizio appello
06/12/2013;
Consultabilità
completa
Riassunto analitico
Transitions between different track support conditions can pose major problems for railways. These zones are located along tracks with different support stiffness, for example at the transition between soft soil and settlement free zones, or at the run on/off to structures such as box culverts or bridges. Problems with transitions on existing lines can cause poor track quality and subsequent excessive maintenance requirements or potential issues at structures due to increased dynamic interaction. Problems can be exacerbated by fluctuating environmental conditions and increased linespeeds. This thesis presents a case study of 13 sites in the UK, and analyses existing data sets to better understand the causes, frequency and nature of deterioration. Operational transition sites and sites planned for remediation have been identified to better understand the performance of the various designs constructed. Transition solutions used comprise geogrids, polymers and micro piles. By analysing the cases in which the treatment was successful or not, it was possible to obtain important information about the behavior of different transition zones and on the treatment used.
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