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Concentric Drilling is a deep foundation method to used installed pipe pile through almost any ground condition, typically using either a DTH rig or crane. A casing “shoe” is welded to a pipe pile casing and a rig bit installed. A pilot bit is then lowered through the pipe shaft and locks to the ring bit. Together they drill a hole large enough to allow the casing to be pulled into the hole. The pilot bit and ring bit rotate with the drill string while the casing shoe and casing do not rotate. After reaching the desired depth, the pilot bit is unlocked by a slight reverse rotation of the drill string. The drill string and pilot bit are then retrieved through the casing.
Driven piles are made of steel, wood, or concrete. They are installed using an impact hammer and are very versatile and are used to support buildings, bridges, and industrial structures of any size. RDI has driven piles for over 10 years.
Sheet Piles are interlocking steel sections that are driven in the ground with a vibratory or impact hammer to support excavations or soil removal. They are used in both temporary and permanent applications. Since the sheets make a continuous steel wall, they are most useful to stop water infiltration, loose soil infiltration, and migration of soils.
Soldier Pile Shoring consists of piles installed several feet from each other in a picket fence type of alignment. The piles are usually H beams installed with a hammer or into pre-drilled shafts. Timber lagging is then installed between the H beams to restrain the soil. Deeper excavations may require tiebacks to be installed at the piles for additional soil support. Soldier Pile Shoring is a common shoring solution, because the size of the piles and the spacing between them can be adjusted to site soil conditions and underground utilities.