Pillings are constructed as single piles or pile groups and a pile walls (pilot buried walls) that serve as a supporting structure, sealing curtains or complex relief-core assembly. Cross section of pilots in depth may be constant (flat sheath) or variable (eg telescopic variable diameter), and depending on the tools for digging can be run pilots with extensions to rate or mantle.

The term drilled pilots are considered to be circular piles with a diameter of 60 cm to 150 cm,

Construction fo drilled pilot include:

• preparatory work and work performance plateau
• excavation (drilling)
• insert of reinforcement
• concreting
• finishing
• supervision and quality control.

Calculation for pilots are generally performed on the basis of the project cost estimate and derived quantities recorded in the construction diary.