Micropiles

Grouted Micropiles

Micropiles are small diameter (approx. 6 to 12 inches) deep foundations that are useful in a variety of applications. Typically, they consist of a grouted column with some length of permanent steel casing and reinforcing bars. These foundation elements generally derive most of their capacity in skin friction. Because of the drilling equipment used for their installation, micropiles are easily embedded into rock. Micropiles are also easily installed in low-headroom access situations and are often also used to retrofit old foundations or provide underpinning support when excavating in close proximity to existing structures.

Helical Micropiles

In certain situations, a helical micropile is useful in lieu of a grouted one. Helical piles are end-bearing steel elements that require no grout mix and are ready for use immediately upon installation (no curing time). These piles can be installed very quickly, however they are generally limited in loading capacities and cannot be used in very soft or very hard subsurface materials.