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Author Topic: underwater cutting  (Read 9390 times)

Offline Stein

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Re: underwater cutting
« Reply #15 on: March 11, 2022, 02:03:31 PM »
I would try to borrow a scuba rig but I wouldn't be surprised if they were about impossible to saw.  It's really hard to get leverage underwater with nothing to push against.  You might try splitting them from the top and seeing if you can then break them off near the bottom.

The other option involves beer, tow straps and wagering and is a bit more unpredictable.

Offline Cylvertip

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« Last Edit: March 11, 2022, 11:16:01 PM by Cylvertip »
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Offline Jingles

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Re: underwater cutting
« Reply #17 on: March 11, 2022, 02:09:46 PM »
I have a Dredge with an air system that you could tie off and  spend the day cutting the old pilings and have a steady air supply as long as the Dredge didn't run out of gas. If you'd be interested in doing something like that if all other options fall through
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Offline KFhunter

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Re: underwater cutting
« Reply #18 on: March 11, 2022, 02:14:59 PM »
Is that a silky saw?  Your URL is broken for us

Offline Mtnwalker

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Re: underwater cutting
« Reply #19 on: March 11, 2022, 03:33:37 PM »
If they're not too massive, your idea of a rope saw might just work with enough grunt and preferably a guy on each end. I'd say 30% chance of success :chuckle: but it might be a cheap first try... My personal leanings would be toward an excavator if you have access, but that's my solution for a lot of things as a former equipment operator. Good luck

Offline jackson7

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Re: underwater cutting
« Reply #20 on: March 11, 2022, 03:47:15 PM »
hookah rigs are great. used them for many years while cleaning boat bottoms, picking up crabs and conch, and general exploring. Was a lot easier than continually filling tanks.

Offline NRA4LIFE

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Re: underwater cutting
« Reply #21 on: March 11, 2022, 04:40:03 PM »
I like Stein's idea too.  Mass quantities of beer, a couple heavy tow straps, a couple F350's and lookout.
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Offline outdooraddict

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Re: underwater cutting
« Reply #22 on: March 11, 2022, 08:36:47 PM »
Found out a family friend has scuba gear and is gonna help me get underwater at least and ill attempt to cut and hook to a truck and get tension on the piling as i attempt to cut the backside of it. Gotta find the most efficient hand saw

Offline Scvette

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Re: underwater cutting
« Reply #23 on: March 11, 2022, 10:02:15 PM »
I worked for a commercial diver in Alaska doing easy jobs. I had to do some grinding on a rudder of a Crab boat so the other guy could weld on it. So I was thinking about when I used a air grinder and thought is there a air powered chain saw so I just looked. Here’s one that’s way cheaper than you quote to remove the post.
https://rentaltoolsonline.com/rental-tools-online-underwater-lift-bags-and-tools-s-83/hydraulic-equipment/hydraulic-tools-s-224/cs06-20-underwater-hydraulic-chain-saw-p-101474.htm
I’m sure this will do the job for you.

Offline Stein

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Re: underwater cutting
« Reply #24 on: March 11, 2022, 10:09:13 PM »
If you go Hookah, be careful especially with homemade things.  If the air isn't completely free of oil and contaminates really bad things happen.  Basically, the oil lines your lungs and you suffocate.  It can happen from SCUBA too, particularly third world locations, but in the US, it's easy to find legit refill stations. 

Certainly don't hook a regulator up to your pancake compressor with the auto oiler and let er rip.

Offline Cylvertip

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Re: underwater cutting
« Reply #25 on: March 11, 2022, 11:16:39 PM »
Is that a silky saw?  Your URL is broken for us
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Offline GWP

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Re: underwater cutting
« Reply #26 on: March 12, 2022, 07:35:35 AM »
If you go Hookah, be careful especially with homemade things.  If the air isn't completely free of oil and contaminates really bad things happen.  Basically, the oil lines your lungs and you suffocate.  It can happen from SCUBA too, particularly third world locations, but in the US, it's easy to find legit refill stations. 

Certainly don't hook a regulator up to your pancake compressor with the auto oiler and let er rip.

This. Same with painting with a hood. You REALLY do not want to breath the oil and contamination.
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Offline CastleRocker

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Re: underwater cutting
« Reply #27 on: March 12, 2022, 07:54:38 AM »
Have you thought about pulling them?  We had a few up at my folks place on CD'A Lake that we couldn't reach during low water, so we put lift bags on them, (two 55 gallon barrels, and two air-bags), and after the water level came up in the spring, it took about three days for one, about a week for the other.   Had both tied off to the dock so they didn't float away.  They were driven in...they will pull out. 
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Online gramps

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Re: underwater cutting
« Reply #28 on: March 12, 2022, 08:21:27 AM »
If room allows around the piling, make a bracket to hold 3 55 gallon barrels.  Take the bungs out and put a hole  in the end of the barrel that would normally be the bottom that can be re-sealed and mount barrels securely to the bracket with the bungs facing down.  Make a manifold with one inlet for an air hose and 3 outlets.  Secure an air hose from each outlet of the manifold to the bung of each barrel ....air hose up inside the bung. Put bracket around the piling and submerge the barrels to allow them to fill with water and reseal the hole in the now top of the barrel.  Apply air to the manifold and all 3 barrels will fill and force the water out of the bung holes and lift the piling .... I think
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Offline lewy

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Re: underwater cutting
« Reply #29 on: March 12, 2022, 08:25:16 AM »
I’ve removed stumps with Inner tubes. Secure them to object deflated, then dive down with air line and fill tubes.
Go hawks

 


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