Micropiles are used to lay foundations for new structures or to reinforce existing structures on cramped sites.
After air, wet or fluid drilling, the micropiles are reinforced and grouted. The type of micropiles depends on the grouting technique:
- with sealing grout gravity filling: type-II micropiles
- with overall and individual grouting: type-III micropiles
- with repetitive and selective grouting: type-IV micropiles
This foundation method consists of transferring loads from the structure to the ground, via a low-diameter bored pile (<250mm) most often equipped with a metal reinforcement (HA bar, pipe, etc.).
Micropiles can be set up to work with either compression, tension, or both.