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Piling

Piling typically entail the drilling and installation of subsurface steel reinforced “columns” that provide high load bearing capacity to heavy structures. This is generally achieved through either end-bearing load transfer onto bedrock or relying on side friction of the piles to generate the appropriate load capacity. This is mostly dependant on the loading requirements and the ground conditions.
Piles is generally used when strip or pad footing designs are insufficient or when building on poor ground conditions and are almost always cheaper and quicker than the alternates, being large raft foundations or soil replacement. They can be used for various structures including multi-storey buildings, bridges, silos, tower cranes, warehouses, and reservoirs, and precast piles are even employed on solar fields and the like for their quick and easy installations. Pile types employed include self-drilling anchor (SDA) micropiles, percussion bored micropiles, Driven Cast In-situ (DCIS) piles, auger piles (open hole, underslurry and cased), and continuous flight auger (CFA) piles.
Currently, Vortex offers percussion bored micropiles, auger piles, and our most popular CFA pile installations, with plans to expand into DCIS and precast driven micropiles.

Percussion Bored Micropiles

Piggybacking off our borehole rigs, Vortex offers micropiles from 165mm up to 270mm. These are relatively small when compared to other types of piles and, due to various design factors such as slenderness ratio, seldomly exceed 3m deep. Thus, they are also mostly end bearing piles used for smaller structures or retrofitting and strengthening existing structures.

Auger Piles

Auger piles are perhaps the most common type of piles available on the market, employing end-mounted auger bits on a rotary motor to drill open holes that are then cast with reinforced concrete. Probably the most reliable method when requiring large bore deep foundations or into harder rock formations, they can also have some significant drawbacks when dealing with loose sandy soils or significant groundwater. Whilst there are various methods to combat hole collapse and water seepage (e.g. casing or drilling fluid), it is difficult to ensure proper quality control without permanent engineering input and supervision. That being the case, it is highly recommended that you employ a trusted contractor with the appropriate technical backing to minimise potential mishaps.
Vortex offers auger piles ranging from 400mm to 1200mm diameter, up to a depth of 24m.

Auger Piles

Auger piles are perhaps the most common type of piles available on the market, employing end-mounted auger bits on a rotary motor to drill open holes that are then cast with reinforced concrete. Probably the most reliable method when requiring large bore deep foundations or into harder rock formations, they can also have some significant drawbacks when dealing with loose sandy soils or significant groundwater. Whilst there are various methods to combat hole collapse and water seepage (e.g. casing or drilling fluid), it is difficult to ensure proper quality control without permanent engineering input and supervision. That being the case, it is highly recommended that you employ a trusted contractor with the appropriate technical backing to minimise potential mishaps.
Vortex offers auger piles ranging from 400mm to 1200mm diameter, up to a depth of 24m.

Continuous Flight Auger (CFA) Piles

Similar to the standard auger pile, the CFA kit involves drilling augered piles down to the required depth. As the name suggests, the auger spiral runs the entire length of the rods to form one continuous flight. Once the required depth is achieved, wet concrete is pumped through the rods and fills the pile hole as the flights are extracted. This is a far faster process that also negates hole collapse and water seepage, ideal for your most common sized piles in clays, sands, and normal ground. The reinforcement cage is then vibrated into the wet concrete as per the design depth.
Vortex offers CFA piles ranging from 300mm to 600mm diameter, up to a depth of 15m.
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