Piling Works

Piling techniques can be split into 2 categories; displacement and replacement. Each has its advantages and disadvantages but we can find the right solution for your piling needs. Not all piling jobs are the same and they don't always fit neatly into the following categories so we will be happy to discuss your piling requirements depending upon the particular circumstances of your project.

In simple terms, during the displacement piling method, piles are driven into the ground pushing the ground out of the way, as you would see in sheet piling. Displacement piling is good for e.g. contaminated sites where it costs a lot to take the spoil away.

Using the replacement piling method, muck is dug out and replaced with the pile. We can use far bigger piles using replacement piling.
 

DISPLACEMENT PILING METHODS ARE TYPICALLY:

1. Pre cast concrete driven piles.
2. Thick wall driven steel tubes.
3. Thin wall bottom driven piles.
4. Timber piles.
5. Screw piles.
6. Helical displacement piles.
7. Vibro concrete columns (drive cast insitu).
 

The advantages of displacement piling are:

1. Self testing as driven to refusal or "set".
2. No pile arisings to dispose of
3. Little disturbance.
4. Limited access.
5. High production.
 

The disadvantages of displacement piling are:

1. Cannot penetrate obstructions.
2. Cannot always penetrate dessicated clay.
3. Vibration and noise may be an issue.
 

REPLACEMENT PILING TECHNIQUES ARE TYPICALLY:

1. Open hole auger piles.
2. Continuous flight auger (CFA).
3. Large diameter rotary piles.
4. Odex piles.
5. Tripod piles.
 

The advantages of replacement piling are:

1. Effectively vibration free.
2. Installed into non cohesive and water bearing soils.
3. High production.
4. Restricted access.
 

The main disadvantage of replacement piling is that

1. It produces excavated material which requires removal off site