Continuous Flight Auger Piles
Continuous Flight Auger (CFA) Piles are built by drilling a hollow-stem auger into the ground to form the pile’s diameter and a concrete pump is utilised to deliver concrete through the hollow auger stem to the pile.
Pile diameters range from 300mm to 1.2 m.
Piling Lengths range to 36 m.
Rig weights range from 11t to 160t.
CFA Piles can be installed quickly and inexpensively without significant vibration or excessive noise being produced. They are ideally suited for most soil types. Avopiling’s own design of drilling tools is capable of drilling into certain rock layers. Once desired pile level is achieved sand-cement grout or special concrete mix is then pumped into the hole through the hollow stem of the auger while being extracted, eliminating the need for temporary casing and making them ideal for non-cohesive or water bearing soils.
CFA System is ideal for foundation piles and for embedded retaining walls such as contiguous and secant piled walls.
- Low noise and vibration
- Works well in non-cohesive soils
- Minimal site preparation
- Suitable for tension loads
- Can be installed successfully into most ground conditions
- Ideal for foundation and piled earth retaining systems
Scope of Works
Hunter Expressway is an infrastructure road and bridge project starting from F3 to Branxton. The remarkable sections of the project is the BW011 twin bridges or Viaduct 3 and Viaduct 1 that runs through Sugarloaf Range. Piles are uniquely designed as influenced by a potential mine subsidence movement in the area. Series of bridges were constructed at around Buchanan Interchange
Scope of Works
Avopiling was awarded by the alliance to undertake the piling works at F3 interchange, retaining walls, noise walls and various bridge towards Buchanan. CFA piling commenced at Theiss' casting yard, then bored piling from F3 to Buchanan Interchange.