• @cynar
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      521 year ago

      Amusingly close to the truth.

      The sides are made elsewhere, and craned in. They are then pile-driven into the riverbed. You can then pump the new hole dry, and start working on the foundations.

    • @[email protected]
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      1 year ago

      No Just put sand on the parameter until it reaches the surface then use sponges to dry out the water inside

    • @edgemaster72
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      151 year ago

      It’s all source blocks, we’re gonna need to spam sponges

    • @[email protected]
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      111 year ago

      But like… how did they even do the first step of ramming the wood piles into a deep ass river without big machinery of some kind?

      • @MeanEYE
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        121 year ago

        Long time and unlimited resources is usually the way to go. Sure machinery would make it fast, but you can get 10 guys to hammer for 2 years to drive it. Then move on. Even today it’s a huge logistics and financial problem to build bridges which is why typically it’s always governments that did it.

      • @Glemek
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        101 year ago

        The machine that shows up about 3 seconds in looks to me like a manual piledriver, uses pulleys and cranks yo pull the weight up, then just gravity to drop it down the track.

        • @Madison420
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          1 year ago

          It is. Time team did a bit on it. I’ll try to find it.

          Ed: https://youtu.be/8FAF1eW9Lz0

          That episode, I’ll watch and find a time stamp but it’ll be a second.

          47:40

        • @[email protected]
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          31 year ago

          Kinda does, yeah, but it’s only put into place after all the piles are in! Maybe they have one of those anchored on a boat or something?

      • @HonoraryMancunian
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        71 year ago

        Sledgehammers (or similar) and lots and lots of manpower I’d guess. It’s how they made it watertight before they drained it I’m interested in

        • @cynar
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          111 year ago

          The weight of the water will push wooden pilings together. The flow of water though the gaps will also bring mud and debris into the cracks.

          It’s not perfect, and would need a lot of pumping/water removal, but it’s just a case of manpower, at that point.

          • @MeanEYE
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            61 year ago

            In the old days they made two walls and poured dirt between them. That stopped a lot of water going in if not all.

        • @[email protected]
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          91 year ago

          It doesn’t need to be fully watertight. The rate of water passing into the dry area only needs to be lower than the rate you can pump it out.

      • @Madison420
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        61 year ago

        The oldest way to do it is to start from a bank and work your way in section by section.

        It’s a cofferdam if anyone is interested.

      • @Gigan
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        11 year ago

        Aliens

  • @Agent641
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    291 year ago

    Step 1: Cut a hole in the water

  • @douglasg14b
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    1 year ago

    This thread is just like reddit threads. All quips and one liners and minimal actual conversation, these posters are indistinguishable from karma-farming bots.

    Literally all but 1 top level comment at the time I posted this one.

    Why is the quality so damn low? It’s honestly depressing, part of the reason for leaving reddit was to get away from what is essentially auto-generated drivel/spam to actually interact with other humans interested in interacting with other humans.


    This is done by pounding metal pilons & sheets into the riverbed side-by-side to create a semi-sealed off section surrounding the work site This can be done in two layers, an outer and an inner wall, and the gap filled with soil. Then the water is pumped out and workers can effectively work in the now exposed riverbed.

    • @Arthur_Leywin
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      101 year ago

      What meaningful conversation did you want from a post that shows a hole in a large body of water? XD

    • Flying Squid
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      91 year ago

      If I wanted to know how bridges work, I wouldn’t be in c/humor.

    • @[email protected]
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      21 year ago

      Isn’t lemmy.world supposed to be reddit but not reddit? Honestly this is kind of expected.

      • Echo Dot
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        1 year ago

        Well it’s supposed to be Reddit for the tankies. Only they’ve mostly gone over to lemmygrad now, but there’s still enough wingnuts hanging around to remind us of them.

  • @AnUnusualRelic
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    151 year ago

    Scoop the water out until you reach the bottom, dig foundations, put water back in. Simple.

  • @Aurix
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    81 year ago

    Do they use a Rent-A-Moses who then has to stay still for a couple of days until he can finally let his arms down?

  • @Sanyanov
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    1 year ago

    This thing can fit a house and a small yard

    Probably a bad idea to build there though…

  • @Ultraviolet
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    21 year ago

    They dig the hole first and then fill in the river.