Working with builders to engineer-designed specifications, A Class Piling and Drilling constructs secant pile walls, contiguous pile walls, soldier piles, bored piles, bored piers and concrete grout injection piles 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
Walls are installed before excavation so adjacent buildings and structures are fully supported and protected from damage or collapse before excavation commences.
Foundation Piling
Foundation piling can be constructed using continuous flight auger grout injection drilling or bored piers.
Contiguous Pile Walls
Used in situations where unstable soils and sands are present and retention is required. The walls are installed before excavation so adjacent buildings and structures are fully supported and protected from damage or collapse.
Contiguous pile walls are a line of unconnected but closely spaced concrete grout-injected or bored piles that form a retaining wall prior to excavation of a below-ground area. The process causes minimum vibration.
Secant Pile Walls
Secant pile walls give superior water tightness to contiguous pile walls. They comprise interlocking primary and secondary CFA or bored piles. Primary unreinforecd piles are installed first followed by secondary reinforced piles. This type of wall has superior retaining characteristics to contiguous walls and will prevent prevent water or soils from leaching between the piles after excavation.
Continuous Flight Auger (CFA)
300mm - 600mm, depth of 9.4mtr piles, 14 tonne highly-manouverable drilling rig suitable for difficult sites.
Continuous flight auger piling has the advantage of causing minimum vibration and noise during installation, and is suitable for closley settled areas. The constantly rotating auger retains the walls of a drill hole without requiring the insertion of a casing, when used in conjunction with grout-injected piles. This speeds up the process, requires less manpower and is a cost-effective solution to the construction of medium-size and small piles.
Soldier Piles
Soldier pile walls are formed using the grout injection method or bored piers. The piles are spaced along the wall at intervals of 1.0 - 2.4 mtrs using suitable materials to infill such as concrete panels, timber shotcrete.
Concrete-Grout Injection Piling/CFA
300mm - 600mm, depth of 9.4mtrs
A concrete-grout mixture is injected into the hole as the auger is withdrawn under pressure, using the continuous flight auger injected rig, thus forming a pile.
Concrete grout injected piles with a continuous flight auger rig can be installed through unstable and saturated soils and low to medium strength rock, where normal drilling methods are cost prohibitive.
Bored Piers/ Bored Piles
300mm - 1.0mtr, depth of 12mtrs
The highly mobile 12 tonne drilling rig is adaptable to a wide range of piling situations and difficult sites. Bored piles are founded into rock, providing an effective means of minimizing foundation settlement and causing little or no vibration.
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. |
