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Robots move Shanghai city block [video]

(www.youtube.com)
142 points surprisetalk | 3 comments | 03 Jul 25 14:02 UTC | HN request time: 0.001s | source
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smusamashah ◴[05 Jul 25 00:02 UTC] No.44469021[source]▶
I dont understand this. I always thought houses/buildings have underground supports on which the structure is erected. Doesn't have to be tall towers, all small buildings have underground support too.

How come these buildings don't have any of that? Or is the support in form of metal rods which these structures are freely screwed to?

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lukaslalinsky ◴[05 Jul 25 04:53 UTC] No.44470161[source]▶
From the video, it seems like the houses were cut from the original foundation and a huge blocks of concrete was formed underneath the houses. Before pouring the concrete, they dug under the houses and inserted metal framework for the move, that was likely how they lifted the whole thing to insert the jacks later on. The process of doing this seems way more interesting to me than the final move with these synchronized jacks. I'd love more details about that
replies(1): >>44470347 #
1. tartoran ◴[05 Jul 25 05:44 UTC] No.44470347[source]▶
I wish that they showed that part too, the synchronized robo-jacks are interesting but the first part seems more challenging.
replies(1): >>44472080 #
2. thenthenthen ◴[05 Jul 25 11:46 UTC] No.44472080[source]▶
I just walked passed, it seems they cut the foundation and somehow poured a new one underneath? Here are some pics: https://ibb.co/yttQQhJ https://ibb.co/KxbM6cnY
replies(1): >>44473234 #
3. linsomniac ◴[05 Jul 25 15:02 UTC] No.44473234[source]▶
Search youtube for "crawl space underpinning" for some videos of a residential process.

I'm sure they're doing something more elaborate there, but in residential you do this underpinning technique if you want to replace or extend your foundation (in my case, putting a basement where there is a crawl space), where you mark the foundation into 2' segments and label them A, B, C. Then you go through and dig/cut out all the "A"s, and pour footings and foundations in place, then repeat for the Bs and Cs. I'm thinking about doing this for my crawl space just to have some more space for storage.