The pile foundation process starts off much the same as any other foundation work. Firstly the site will be properly excavated; this involves removing around 150mm of soil and debris. The area is then deepened and removed of any contaminates to leave a good working base before the ground is marked to clearly show where the piles need to be placed.
Some Piles are driven piles, this involves the use of a large machine which acts very much like a hammer. The machine forces the piles into the ground to the depth needed. The piles are normally 3m lengths and these were made of steel.
Sometimes piles are drilled into the ground, this is a general all purpose application for new and refurbishment projects.
Tubular steel piles can go down to 50M deep!