Macropiles are ultra-high capacity micropiles, with high strength grout, steel reinforcement, and increased diameter over 300mm.
- Support structures
Macropiles are drilled and typically bear on or in rock, but can also bear on very dense soils. During installation, the steel casing is inserted in the ground to design depth. In a situation where the drill hole can stay open without casing, an open hole can reach design depth with the casing installed after. Grout tubes are then pumped with high-strength cement grout by tremie. The casing may be extended to the full design depth to provide additional structural reinforcement.