National Transport Library Research Database

Korsande ledningars och kulvertars inverkan på bankar för höghastighetsjärnväg (Influence of pipes and culverts on the performance of embankments for high speed lines )

  • Laue, Jan
  • Luleå tekniska universitet, Universitet eller högskola, 202100-2841
Sponsors, duration, budget: Trafikverket ; 2020-08-15 -- 2023-01-31 Registration number:
  • Trafikverket 2020/58767
Subject(s): Online resources: Abstract: Nya järnvägar skär genom existerande infrastukturer och passerar vägar, på broar över vattendrag och över olika ledningar/kulvertar. Passagerna orsakar styvhetsförändringar som kan skapa såväl deformationer i ledningen som styvhetsförändringar som orsakar ojämna gångegenskaper. I det här projektet ska utvärdering av effekten av styvhetsvariation i form av sättningar såväl som påverkan av gångegenskaperna. Abstract: New railway tracks will pass through already developed terrain and will cut through existing infrastructure. Beneath roads or rivers, which have to passed by bridges or under passed by tunnels, there are a huge number of other objects to be crossed reaching from cables for electricity or optical fibres over sewer pipes or pipes for heating and and gas to culverts allowing stormwater, streams or animals to cross through the railroad. This causes a change in stiffness of either embankment or subsoil and are a mayor cause for damages already nowadays (Gamarbaki et al. 2019: Underground pipelines and railway infrastructure - Failure consequences and restrictions). This is of even greater importance when the embankments are build for high speed railways, where two concerns have to be taken into account. The first is the influence of stiffness and the extend of the crossing so that deformation will not occur differentially. Also the long term stiffness of the crossing has to be taken into account. Second, pipes or culverts crossing the embankment or the subsoil perpendicular to the track might act as a barrier for the bow waves of the trains. A bow wave of a train might hit the barrier and will be reflected with potential amplification of the wave and causing heave later on the track leading lighter cars to potentially derailing like those having be discussed after the Eschede 1998 disaster involving an ICE. This project shall be setting the basis to evaluate the combined effects of stiffness, form and size of an infrastructure crossing on the development of deformation as well as their influence on building a barrier for the bow wave propagation.
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