Services
Piling WA offers expertise in both piling and earthworks services. Specialising in small-scale projects, we ensure high-quality, on-time, and budget-friendly solutions, spanning ground retention to diverse residential, commercial, and industrial earthworks.
Piling Services
Continuous Flight Auger (CFA) Piles
Continuous Flight Auger (CFA) piles are cast-in-place foundations installed using a continuous hollow-stem auger. This low-noise, vibration-free method is ideal for urban environments and unstable or water-bearing ground conditions. CFA piles provide structural support, earth retention, and ground stabilisation for buildings, infrastructure, and flood-protection projects.
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Process
The auger is drilled to the required depth in a single pass. As it is withdrawn, concrete or grout is pumped through the hollow stem under controlled pressure to form a continuous pile. Reinforcement is then placed into the fresh concrete.
Advantages​
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Low-noise, vibration-free installation
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Minimal disturbance to surrounding ground and structures
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Resists compressive, uplift, and lateral loads
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Cost-effective for high vertical and horizontal load capacity
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Suitable for weak soils and high groundwater conditions
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Rapid installation without temporary casings or support systems
Contiguous Piles
Contiguous pile walls are used as part of a shoring system, for the purposes of earth retention, and provide an efficient and cost-effective solution for the construction of retaining walls. As a bonus, these temporary or permanent structures benefit the environment by providing an earth-retaining solution that restricts soil movement on the retained side of wall while requiring minimal excavation.
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Process
Contiguous pile walls retained by anchors or strutting systems are often supported by a waler beam to distribute the loads (and prevent anchors/struts from punching through the infill) and as a mitigation measure for the unlikely event of an anchor/strut not carrying the load. This waler beam can be constructed as a reinforced concrete beam casted towards the pile wall, or by using steel profiles fixed to the piles and anchors/strutting systems.
Advantages
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Ideal for use in built-up urban areas or industrial settings because of:
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low levels of vibration and noise generation
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minimal deformation of the adjacent ground or soil mass
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Economical solution for supporting significant vertical and horizontal structural loads
Bored Piles
Bored Piles are non-displacement piles suited to a wide range of ground conditions and applications that are cast in situ and provide economical foundation load bearing and retention wall solutions.
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Process
The pile bore is advanced using a drilling tool driven by a piling rig. The tool advances the bore each bite so the full rig capacity is available for the entire boring process. If the bore requires support to remain open, various methods are available and are selected based upon the soil/sand conditions, the environment, and the ground water regime.
These range from fluid support using water, polymer or bentonite, or mechanical support in the form of temporary or permanent casing.
Once the bore has been advanced to depth, and cleaned, the bore is then filled with concrete.
Advantages
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Very high load capacity
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Various diameters available from 250mm to 450mm
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Can be installed in a wide range of conditions
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Minimal settlement and deformation
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Minimum vibration
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King Post Walls (Post and Panel System)
King post/soldier piles are a cost effective temporary or permanent retaining wall that uses beams and pre-cast concrete panels.
King post walls are suitable in various different ground conditions and can be used in most retention applications. They are also often used for embankment retention, flood defence walls, and basements/below ground garages.
Process
King post walls are a quick and simple installation method. They comprise drilling a hole, filling it with concrete, then installing an H beam. This allows concrete pre-stressed panels or sleepers to be inserted between the webs of the H sections.
Excavation then results in the finished embedded retaining wall.
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Advantages
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Quick to install
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Cost effective compared to sheet and concrete piled walls
