Sectional Flight Augered Piles
So, What Is Sectional Flight Augered Piling?
SFA piling involves drilling into the ground using a screw-like auger made up of connected sections. Once the desired depth is reached, concrete or grout is pumped through the hollow stem of the auger as it’s slowly withdrawn, creating a continuous pile. Reinforcement is then plunged into the fresh concrete to complete the pile.
This method is ideal for sites with limited headroom, restricted access, or where minimal disturbance is essential.
How We Solve Your Problems
✅ Working in Confined or Restricted-Access Areas?
SFA rigs can operate in basements, city centres, or tight spaces where traditional large piling rigs can't access — giving you options, not obstacles.
✅ Worried About Vibration?
SFA piling is near vibration-free, making it ideal for sensitive locations like hospitals, schools, and residential areas.
✅ Dealing with Soft or Unstable Ground?
This method excels in cohesive and loose soils, offering consistent and reliable load-bearing capacity.
✅ Not Sure Where to Start?
We’re here to walk you through every step — from an initial site visit to pile design and installation — with clear communication and expert advice.
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250-
450mm Pile diameter range -
Up to 24m maximum pile depth
*depending on ground conditions -
450mm minimum distance piles can be installed from a vertical face
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2.8m minimum headroom required
Frequently
Asked Questions
What types of projects are best suited for SFA piles?
SFA piles are ideal for projects with limited access or low headroom, such as urban sites or indoor projects, and are particularly effective in cohesive soils or clay.
How is concrete or grout applied in the SFA piling method?
In SFA piling, concrete or grout is pumped through the hollow stem of the auger as it is slowly withdrawn, filling the pile hole from the bottom up to form a continuous pile.
Are SFA piles a cost-effective solution for deep foundation projects?
Yes, SFA piles are often cost-effective for medium to deep foundations due to the efficient installation process and minimal vibration, reducing site preparation and environmental impact costs.
What equipment is used for installing SFA piles?
Specialised drilling rigs with hollow-stem augers are used to install SFA piles, allowing for simultaneous drilling and grouting.
How deep can SFA piles go in a typical project?
SFA piles typically reach depths of 10 to 25 meters, though depth may vary depending on soil conditions and load requirements.
What are the benefits of using SFA piles over other piling methods?
SFA piles generate minimal noise and vibration, making them suitable for sensitive sites, and they offer rapid installation with consistent load-bearing capacity, especially in urban or constrained areas.
What information do you need from me to get started on a piling design?
We’ll need a geotechnical survey, load requirements, site plans, access information, and any budget or timeline constraints to create an effective piling design.
How do your piling solutions improve structural support?
Our piling solutions transfer loads to deeper, stable soil layers, preventing settlement and providing a solid foundation, essential for the long-term stability of structures.
