Micropiles can be utilized also for underpinning. They would typically be installed immediately adjacent to the structure to be supported. A pile cap or a temporary bracket may be mounted to the underside of the footing and may be used to transfer the load to the micropile.
Bracket Piles- Bracket piles are typically used in conjunction with earth retention work to support and/or stabilize existing foundations adjacent to a proposed excavation. The new piles are installed in pre-drilled holes alongside the exposed wall or column footings. A bracket is mounted to the underside of the footing and attached perpendicular to the new pile to transfer the load below excavation subgrade.