Micropiles
Micropiles are generally 12” / 305mm in diameter or less and typically consist of a single steel element installed in the center and constructed with grout instead of concrete. Additionally, a permanent steel casing may be installed to enhance lateral capacities. Micropiles have emerged as an ideal deep foundation choice for projects where conventional deep foundations may pose difficulties or prove infeasible. They excel in restricted access areas, problematic ground conditions, and offer both compression and uplift (tension) working capacity. Micropile axial capacities, owing to grout-to-ground bonds and grouting techniques, can reach up to 200 tonnes, surpassing conventional piles relative to size and diameter.
Micropiles Installation
Micropiles are usually installed using smaller drill rigs akin to anchor drills. Some micropile drills are portable and can be transported by helicopter for remote access applications. These piles can be drilled and installed up to 100 feet in length, often being the preferred deep foundation option when faced with challenging soil and geotechnical conditions.
Limited Access Piling (low headroom, indoor, restricted work area, etc.)
Challenging and difficult ground conditions
Seismic upgrading and retrofitting
Uplift (Tension load) applications
Heli-portable access
Transmission Tower Foundations
Underpinning
Rehabilitation
Slope and Rock Stabilization
Weight-restrictive projects
