Hello to All, I am trying to rem

Pufimare · Jul 26, 2021

Hello to All,

I am trying to remove a U-shaped sheet pile wall from the end of a dock with a Vibro hammer attached to a crane. The sheets are corroded. Also, there are a lot of vertical welds between the sheets. We removed all the wall elements, torch cut the weldings and did a lot of vibrations. The sheets are simply not moving or are moving just a few inches. Looking for somebody who has some experience with this type of situation. Thanks in advance for your help.

SlideRuleEra · Jul 26, 2021

...trying to remove a U-shaped sheet pile wall... with a Vibro hammer attached to a crane.

Drive each sheet down a few inches with the vibro hammer. If that does not work, use an impact hammer to drive them down.
Then try using the vibro hammer to extract the sheets.
If that does not work, the next step is to try an impact "extractor" (sort of an impact hammer that works upside-down).

http://www.SlideRuleEra.net

Compositepro · Jul 26, 2021

This seems very similar to the problem of removing rusted nuts and bolts, particularly when you say you can get some movement then none. The problem is grit in the joint jamming the parts together, which only jams tighter with more movement. The key is lubrication to fluidize the grit particles, and momentarily reversing direction when you get a jam. Flowing water will work as a lubricant in your situation.

LittleInch · Jul 29, 2021

The other option you sometimes need to do is drill a lot of small (1 or 2") pipes behind the wall down to at least 2/3 the way down the piles then pump lots of water down there at the same time as pulling up, but yes a push pull technique is often a good move as well.

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