PILING SYSTEMS

CONCRETE INJECTED CFA PILING

Vibration free and low noise, this environmentally friendly piling system is ideally suited to installation in unstable soil conditions and urban environments. Vibro-pile has Australia's largest fleet of high capacity CFA rigs which enable us to construct CFA piles with higher load capacities and to greater depths than our competitors and has made us a world leader in this field.

With load bearing characteristics superior to conventional bored piles, CFA piling can be installed through unstable and saturated soils, where conventional bored piles would require the use of drilling fluids and/or extensive and costly casing. Production rates in the order of three times that for conventional bored piles are achievable, with corresponding construction program savings.

Boring is by means of a continuously flighted auger on which the bored spoil is transported to the surface, while preventing the unstable walls of the hole from collapsing.

On completion of boring, concrete is pumped under pressure through the hollow stem of the flighted auger. Finally, reinforcement is inserted into the concrete using a hydraulic vibrator clamped to the top of the cage.

An on-board computer monitors the penetration rate, torque, extraction rate, concrete pressure and oversupply, all of which are displayed for the operator, in real time, so as to ensure pile quality and integrity.

Diameters ranging from 400 mm to 1200 mm are available to depths in excess of 40 metres.

Rock socketing of CFA piling is also feasible in medium strength rock, by using special cutting heads, thus enabling the installation of extremely high-load capacity piles.

Vibro-pile applies the latest design theories and proven construction methods, ensuring that all available soil capacity is harnessed to provide a highly efficient foundation.

Maximum Depth > 40 m
Maximum Working Load 8000 kN
Installation Speed up to 200 lm/day
CFA PROCESS
Step 1 - Boring
Step 2 - Commencing concrete injection
Step 3 - Auger extraction
Step 4 - Reinforcement introduced