How to remove Pile foundation

[K Baaru]

Hi friends,

How to remove a 10 meter pile foundation which is drilled and installed into the earth.

Thank you.

 

[1503-44]

Add water, pull hard.

Einstein gave the same test to students every year. When asked why he would do something like that, "Because the answers had changed."

 

[dik]

Piles are often cut off a few feet below the new structure, so they are out of the way.

So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[MotorCity]

Dynamite. Why do they need to be removed?

 

[JedClampett]

I had the same question on sheet piles a few years ago. I think you try to vibrate and pull. Water will help.

 

[MTNClimber]

Vibrate, push, and pull. Sometimes you have to push to break the skin friction before you pull. Old timber piles can break, steel piles that have splices can break at corroded welds. Often, the piles can't be removed and are typically just cut 5' below the ground surface. Good luck!

 

[PEinc]

Possible methods: pull, vibrate and pull, jet next to the pile and pull, auger next to the pile and pull.

http://www.PeirceEngineering.com

 

[BridgeSmith]

I'm not clear on what type of pile it is. Is it concrete, steel or timber?

You say it's "drilled", so that would imply a concrete drilled shaft, AKA a caisson. If that's what you have, removing it in total probably means excavating around it down about 9m and still using a substantial amount of force to break it free from the embedment soil. If it's drilled into rock, forget about pulling it; you'd just end up breaking it, anyway. As others have said, generally for those, they're just busted down below the new structure, and the remainder left in place.

For timber, you generally have to excavate below the level of section loss that has filled in (2-3 feet), and then they can be pulled with a crane, or possibly an excavator (track hoe), depending on the size.

For steel, water jetting and a vibratory extractor is the typical method.

Rod Smith, P.E., The artist formerly known as HotRod10