Contiguous pile wall
Contiguous pile wall with beam for foundations
Reinforced contiguous pile wall
Contiguous retaining wall
Contiguous retaining wall
Foundation drilling
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Working with builders to engineer-designed specifications, A Class Piling and Drilling constructs contiguous bored pile walls and secant pile walls using a continuous flight auger (CFA) and concrete-grout injection.
These walls are used in excavations to retain soil, sand and water and, with the addition of concrete beams, can form the basis of foundations. Single piles can also be used as footings.
Benefit
The walls are installed before excavation so adjacent buildings and structures are fully supported and protected from damage or collapse before excavation commences.
Contiguous Pile Walls
A line of unconnected but closely spaced bored piles that forms a retaining wall prior to excavation of a below-ground area. The piles are created by concrete-grout injection and a shotcrete finish may be sprayed over the wall to create a flat surface.
Secant Pile Walls
Interlocking or overlapping reinforced bored piles that form a continuous, near watertight wall in unstable and water bearing soils to prevent water or soils from leaching between the piles after excavation. This type of wall has superior retaining characteristics to contiguous walls.
Continuous Flight Auger (CFA)
The constantly rotating auger retains the walls of a drill hole without requiring the insertion of a casing. This speeds up the process, requires less manpower and is a cost-effective solution to the construction of medium-size and small piles.
Concrete-Grout Injection
A concrete-grout mixture is injected into the hole as the auger is withdrawn under pressure thus forming a pile.
Our Equipment
Kelly Bar Auger Rig
This rig weighs 12.5 tonnes, has a height of 8.2M and can drill to a depth of 12M with holes 300-1200mm diameter
Grout Injection Rig
This rig weighs 14 tonnes, is 10M high. The 300m and 600m diameter drills to a depth of 8 metres; the 450 drills to a depth of 9.5 metres. |
