Mini bottom driven piles are typically used within restricted areas for poor ground conditions, where deep foundations are impracticable.
A closed-ended thin-walled steel tube is driven in lengths of between 2m and 6m using an internal drop hammer on to a dry concrete plug. The tubes are joined by a full but non-structural fillet weld as the installation proceeds until the pile is driven to a predetermined set or design length criteria. Once the required depth is reached the tube is filled with high slump concrete or grout and a single bar or cage is inserted.
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