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  • 1.  Railroad track with settling solution!

    Posted 05-18-2018 01:31 PM
    Edited by Tirza Austin 05-24-2018 11:50 AM

    Currently there are 10's of millions of CSU's (container standard units). They wear down to not being allowed for intended purpose. Cut off the top and as a 40 x 8 or 20 x 8's drop into excavation to correct settling and ballast - track over. Views appreciated.  Have you done such? Not "best" but might be very cost effective.

    www.gasturbineandersen.com Len Andersen Going to Norway June Engineer
    Water Swirled Gas Turbine Technology
    New York NY 10116-1529
    Engineer - Gas Turbine Welding CWI
    + 20 yrs experience

  • 2.  RE: Railroad track with settling solution!

    Posted 05-19-2018 06:23 PM
    The issue is the walls of the container are not robust enough to hold the soil. Hence, no soil improvement.

    Craig Groce P.E., M.ASCE
    Railway Engineer
    C & G Technical Services LLC.
    Morrisville NC

  • 3.  RE: Railroad track with settling solution!

    Posted 05-23-2018 09:35 PM
    ​In the old days, railroads used to use rail gondolas for retaining walls.  Setting them in with the trucks removed and filling them with gravel to serve as gravity walls, either individually, or stacked as structural blocks.  I would think containers could be used in a similar fashion.  As noted in an earlier comment, the ability of the container to take the lateral pressures induced by the fill inside is a key, but I would think that the design basis for the CSU's would tell you that.  The issue with your proposed use would be removal of the top, since that forms part of the structural support for the side walls.  If you are fully burying it, then the container would only be acting as a separation for the fill from the surrounding soils, and there is no reason why that would not work.   If you are only filling with gravel, you may not have to remove the entire top, but only access hatches to get the gravel in and that way could preserve more structural capacity within the unit. Just a thought...

    Michael Byle P.E., D.GE, F.ASCE
    Tetra Tech Inc.,
    Langhorne PA
    (215) 702-4113

  • 4.  RE: Railroad track with settling solution!

    Posted 05-24-2018 11:32 AM
    We have used sheet pile and pre-cast T-wall (see: Neel Company or Fort Miller) but have always backfilled with a well-graded, granite based fill. I imagine that these containers behave similarly to t-wall in that they provide a rigid 'bed' within which the backfill is contained. My only caution is that if your railway is in electrified territory - particularly DC 3rd rail - you need to be sure you have all stray current under control and captured otherwise any steel-based earth retaining system will corrode rapidly. 


    Allen Griffith, E.I., PWI, A.M.ASCE
    Project Engineer
    Skanska Civil USA
    New York NY

  • 5.  RE: Railroad track with settling solution!

    Posted 06-28-2018 09:58 AM
    Edited by Tirza Austin 06-28-2018 09:58 AM

    I think using a gabion can work in some cases, because gabion can act as a retaining wall. It also gives the opportunity for land to "breathe," pore water or surface water from rain will not be retained so that soil density can be maintained.Image result for gabion advantages and disadvantages

    Abdul Desfiansyah CCM, P.E., M.ASCE
    Sumitomo Corporation
    6221 5251550 x130