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Thread: Ground beneath crane gives way - GIF

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    nova_robotics (May 20, 2022)

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    Supporting Member Frank S's Avatar
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    That suddenly got real expensive, and it wasn't from lack of trying to properly pad the support legs
    Never try to tell me it can't be done
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    Supporting Member NortonDommi's Avatar
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    What did the Geo surveyor have to say?

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    Supporting Member Frank S's Avatar
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    Quote Originally Posted by NortonDommi View Post
    What did the Geo surveyor have to say?
    If one had been called for his site analysis. He would have referred them to a civil engineering contractor who would have excavated the proposed crane pad site, then driven piles into the ground on the downside of the slope to create a stabilizing barrier, back filled with rip rap and crushed stone mixed with select fill, compacted this to 125%, then the crane could have been brought in. Expensive but often worth the cost when the strata under the surface is unknown especially on a slope or near a body of water.
    You can tell there was some concern about the pad area by the way the blue hard hat was keeping an eye on it. It looked like they had decided to abort the lift and was bringing the beam section in as close as possible to set it down
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    At about 3seconds in, they were talking about something "breakin away". Seems they should have stopped and reset at that point.
    Last edited by hemmjo; May 21, 2022 at 06:51 AM.

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    mccwho (May 26, 2022)

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    Although it may not have been a factor in this situation, the load swinging changes the dynamics of the weight on the crane.

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    Supporting Member Hoosiersmoker's Avatar
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    Blue hard hat at 0:16 was looking under the wheels of the crane at the large cracks that had formed. Should have aborted then if they could.
    "Divided We Stand, Together We Rise!" - (From "White Feather") - Marillion

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    mccwho (May 26, 2022)

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    Supporting Member Frank S's Avatar
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    Quote Originally Posted by Hoosiersmoker View Post
    Blue hard hat at 0:16 was looking under the wheels of the crane at the large cracks that had formed. Should have aborted then if they could.
    It looks like they were already being well beyond the abort the lift stage by that time. From there on out it was hope and prayers they could get the load on the ground before something happened. Didn't quite make it though.
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    I reckon it was taking a gamble in the hope of saving a few bucks. That is a tidal river and looking at that soil not good. Mats or not Mangroves, mud and shell banks do not good footing make. Hard to believe anyone with experience would have attempted that lift.



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