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Jetting in pvc dock pilings.
The pump hose was connected to a length of 6 pvc pipe with a tee.
The technique of installing a dock piling is known as jetting.
The process involves using a high power water pressure hose to literally dig a hole out of the soil that you can sink a piling into.
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Installing posts or piling in the water to support a dock or pier can be done either by jetting with water or driving with a pile driver if the earth under the water is not too rocky yet is solid enough to be load bearing.
Here is what i am thinking.
I will take a piece of 8 pvc pipe and place a couple blocks of wood on top and hammer it in to the pond floor with a sledge hammer.
Connect the pump to the side part of the tee.
I helped a follow worker put dock post in using a portable 6 hp water pump.
Unscrew the cap slide 4x4 down in side the pvc.
It should work ok if you have enough water volume.
If you want to build a pier or a dock you need good sturdy pilings or posts to support it.
The top of the tee had a screw on cap.
Jetting is better for sandy soil while concrete is more stable for muddy beds.
Place the tee so it is sideways.
I ve never used that method to set pilings in water doc but i ve drilled a small hole in a cap on the end of pvc with a hose fitting on the other end to jet a pipe under a concrete drive about 20.
I have an existing dock that has seen its better days and i want to build a new dock in its place.
Because driving pilings requires heavy equipment this article will focus on jetting them.
Wash the hole down as deep as you need it.
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Pull the pvc.
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