Bored piers are a non-displacement pile formed in cohesive ground conditions where an auger and soil column may be extracted from the drilled hole without collapse, allowing reinforcement to be lowered into the hole and concrete to be pumped in to complete the pile. Bored piers are typically used as foundation piles to limit settlement of the structures they support, however the technique may also be applied to the construction of soldier piles for retaining walls.
