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Re: [CHICAGOTRANSIT] Green Line problems

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  • ajkristopans@webtv.net
    There was constant column footing replacement going on since the early 80 s. On any given day 2 or 3 were under repair, usually nowhere near each other. Each
    Message 1 of 34 , Nov 1, 2003
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      There was constant column footing replacement going on since the early
      80's. On any given day 2 or 3 were under repair, usually nowhere near
      each other. Each one took about a week to do, between digging out the
      old one and pouring the new one. However, at that rate it would have
      taken 50 years to do all of them. During rebuilding they were done 20 at
      a time. They would do every other one of a consecutive group of 40, then
      when those were done do the other 20, then move across the street and do
      the same on the other side, then move down to the next group of 40. This
      way all 20 were dug up in a few days, and all 20 were poured in a couple
      of days. Even then, it took a good six months to do the line.

      Blue Line between Evergreen and Sacramento, a much smaller stretch,
      still took almost 5 years to do, as they were done three at a time.

      Andre


      http://community.webtv.net/ajkristopans/ANDRESSERIALNUMBER
      http://community.webtv.net/ajkristopans/MODERNURBANRAIL
    • ajkristopans@webtv.net
      Welded rail has expansion joints , but they are few and far between, at least several hundred feet, and as much as a half mile apart. Jointed rail has an
      Message 34 of 34 , Nov 5, 2003
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        Welded rail has "expansion joints", but they are few and far between, at
        least several hundred feet, and as much as a half mile apart. Jointed
        rail has an expansion joint every 39 feet.

        Andre


        http://community.webtv.net/ajkristopans/ANDRESSERIALNUMBER
        http://community.webtv.net/ajkristopans/MODERNURBANRAIL
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