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Engineer: Egyptians built pyramids by piling rubble and attaching bricks later

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Re: Engineer: Egyptians built pyramids by piling rubble and attaching bricks later

#51
post #8

Interesting idea, and maybe one worth investigating further. I've always liked the internal ramp theory: https://www.youtube.com/watch?v=Ws4O5LOCI68 In the end, lets all at least agree that it was human innovation and not alien technology that built the pyramids.

[deleted]

Re: Engineer: Egyptians built pyramids by piling rubble and attaching bricks later

#52

Earlier quoted context omitted.

>That would take an incredibly long time. Note that Egypt was a lot wetter when the pyramids were built (circa 2500 BCE). http://www.pbs.org/wgbh/nova/next/ancient/climate-change-may... >Heck, imagine the PSI of water at the bottom of the pyramid columns when they were reaching a hundred feet high? A column of water 100 feet high exerts 43 psi at its base.

OK. So, the great pyramids were nearly 500ft tall. At the top, the pressure below would have been around 200psi. Even the most stalwart modern plumbing fixtures have trouble past 72psi. 100psi is the upper limit before things start to fail. I don't think that there would be a mechanical problem with stone holding back that pressure, it's the leakage that would be the killer.

Modern plumbing stuff is designed to be economical. (Which just limits the usefulness of extrapolating from there)

If the mechanics of using the stonework to hold the water were well worked out I would think clay would work well to seal small cracks (and for the scale we are talking about, the 'plumber' could just crawl on in). Or pitch or other sticky stuff.

Re: Engineer: Egyptians built pyramids by piling rubble and attaching bricks later

#53
post #37

Earlier quoted context omitted.

I was wondering too. This video explains in more detail how they used pressure to move the water up http://youtu.be/C1y8N0ePuF8?t=15m20s

Archeologists would be able to find evidence of these water piping from springs underneath the pyramid.

I agree, they say that they should have found evidence of ramps... well they should have found evidence of this water structure if it was used.

Re: Engineer: Egyptians built pyramids by piling rubble and attaching bricks later

#54
post #45

For the sake of the argument, let's accept "The structural engineer reckons that would be impossible as the ramps would have had to have been at least a quarter of a mile long" and ""If that happened, there would still be signs that the ramps had been there, and there aren't any." This idea replaces that quarter mile ramp by a waterway with a difference in water level of 150+ meter and thus with 150+ meter high water…

There's a second video that addresses this that's linked elsewhere in the comments. Basically he outlines some evidence for a high pressure natural spring underneath the pyramid, and that some of the branches off the main burial chambers that have never been adequately explained were used to fascilitate water movement. For the last few levels, he proposes a regular old bucket line. Over all, not implausible. In some ways, more so than the standard heave-ho theory.

Re: Engineer: Egyptians built pyramids by piling rubble and attaching bricks later

#55
post #8

Interesting idea, and maybe one worth investigating further. I've always liked the internal ramp theory: https://www.youtube.com/watch?v=Ws4O5LOCI68 In the end, lets all at least agree that it was human innovation and not alien technology that built the pyramids.

1. People, in general, are smarter than the ancients and civilization has progressed since then. 2. We don't know how they built the pyramids. Either aliens built the pyramids, or we're dumber than the ancients.

Hmm, Poe's law? I'll bite.

When it comes to engineering, domain knowledge is often far more important than any kind of inherent "smartness," and ancient Egyptians had thousands of years of block-stacking domain knowledge that we don't. While modern society has billions of tricks up our sleeve that would completely befuddle ancient Egyptians, I'm sure they had a handful of tricks that would catch us by surprise. Knowledge isn't strictly ordered.

Also, just because we aren't sure precisely which strategy they used doesn't mean that we didn't think of it, it just means that we can't find evidence to overwhelmingly support a single one of our hypotheses.

Re: Engineer: Egyptians built pyramids by piling rubble and attaching bricks later

#56
post #35

Not passing the sniff test for me. Three flaws at first glance… At the end he describes lowering blocks into place by incrementally removing bladders. This does not work. As soon as you are fully submerged and displacing with bladders you are unstable. As your depth increases, pressure increases, and your displacement goes down making you sink even faster. The good news is if you get neutrally buoyant you could poke…

Your sniff test doesn't matter. There was a recent episode of 99% Invisible talking about an architect in NYC who proposed building a skyscraper out of a steel internal skeleton but all the best engineers of the day scoffed at him. He built it, it still stands, and it changed out skyscrapers have been built since.

Point is, I'm skeptical too but the fellow has made some more videos that go into more detail. They even directly answer some of your questions.

Don't immediately write something off without doing some due diligence first. The more I'm learning about this, the more practical it seems.

Re: Engineer: Egyptians built pyramids by piling rubble and attaching bricks later

#57
post #35

Not passing the sniff test for me. Three flaws at first glance… At the end he describes lowering blocks into place by incrementally removing bladders. This does not work. As soon as you are fully submerged and displacing with bladders you are unstable. As your depth increases, pressure increases, and your displacement goes down making you sink even faster. The good news is if you get neutrally buoyant you could poke…

He explains it better in the second part, including how they got the water to the top, water pressure, water proofing ect. http://youtu.be/C1y8N0ePuF8 and of course in the actual book

Re: Engineer: Egyptians built pyramids by piling rubble and attaching bricks later

#59
post #8

Interesting idea, and maybe one worth investigating further. I've always liked the internal ramp theory: https://www.youtube.com/watch?v=Ws4O5LOCI68 In the end, lets all at least agree that it was human innovation and not alien technology that built the pyramids.

1. People, in general, are smarter than the ancients and civilization has progressed since then. 2. We don't know how they built the pyramids. Either aliens built the pyramids, or we're dumber than the ancients.

There are more smart people today than x years ago != The smartest people today are smarter than the smartest of x years ago.

I spent a bit of time over the past few years really old text (some 2000 years+). Nothing in those writings suggest we are smarter than those people.

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