What are jetted piles?

The jetting technique liquefies the soils at the pile tip during pile placement, reducing the friction and interlocking between adjacent sub-grade soil particles around the water jet. Pile jetting can be used for most types of steel, wood, and concrete piles.

Where are jetted piles used?

Jetting can be used for driving concrete or heavy tim- ber piles and sheet piles including wide flange, T-shaped, or similar concrete sheet piles. It is a relatively quiet driving process because it does not shake the ground, and it can also help to minimize damage to piles in hard clay or dense sand.

What is the meaning of pile driving?

pile-driver in British English 1. a machine that drives piles into the ground either by repeatedly allowing a heavy weight to fall on the head of the pile or by using a steam hammer. 2. informal. a forceful punch or kick.

How do you water jet a post?

The process is done by placing the posts on the lake bed bottom and pound them down with a sledge hammer to a depth of at least 2 feet. Aim the jet at the bottom of the post to jet out the sand and water. As the sand is removed, the post will sink deeper.

What’s the difference between jetted piles and driven piles?

Pile jetting utilizes a carefully directed and pressurized flow of water to assist in pile placement. The application of a concentrated jet of water at the pile tip disturbs a ring of sub-grade soils directly beneath it.

How does jetting assisted sheet pile driving work?

The process basically involves discharging water under pressure near the toe of the sheet pile being driven. The rigid steel jetting pipes are usually welded to the pile, with hoses connecting them to the jetting pumps. The water jet loosens the soil, reducing the resistance to penetration of the pile toe during driving.

How does water jet work on sheet pile?

The rigid steel jetting pipes are usually welded to the pile, with hoses connecting them to the jetting pumps. The water jet loosens the soil, reducing the resistance to penetration of the pile toe during driving. Under some ground conditions, the water flowing along the pile acts as a lubricant and could reduce skin friction.

Where to place a jet pipe in a pile?

Piles that are placed in uniform granular soils may be installed with a jet pipe placed through or near the center pile dimension. Other piles may have two water jet pipes fitted on either side to provide evenly distributed water jet coverage during placement.