Open hole augered mini piles→

How it works

A compact rotary rig drills the pile bore, bringing the soil up on the auger. Once the bore reaches the design depth, reinforcement is placed and the hole is filled with concrete. In stable, cohesive ground the bore stays open on its own while this happens.

When it’s used

Open hole augered mini piles are typically considered for cohesive soils such as firm to stiff clays, soils prone to ground heave, and ground with a low water table. Their small rigs suit extensions, underpinning, work inside buildings and other restricted access sites.

Advantages

• Rotary augering causes minimal vibration, so it’s ideal next to buildings and underground services
• Low noise
• Easily adapted for down-the-hole hammer drilling to anchor into firm strata such as mudstone or sandstone
• Can be designed to overcome the adverse effects of ground heave