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Australia

Just the

Drill For

Aircraft

Parking

Bays

Phase 1 of a $10 billion upgrade for

Melbourne International airport in-

volved creating new aircraft parking

bays. These comprised 200,000

square meters of new concrete.

The airport authority awarded the work to contrac-

tors, Fulton Hogan and McConnell Dowell, who subcon-

tracted the concrete and formwork to Oak Park

(Tullamarine) Pty Ltd.

During the course of the project, Oak Park completed

work in two areas.

At the international terminal, they drilled holes for

21 new aircraft parking bays. For Terminal 4 construction,

they drilled holes for the aprons where airplanes park

while loading and unloading passengers.

Renee Bell, Oak Park’s general manager said that

although they had the experienced crew to take on the

project, the challenge was to determine the best equip-

ment to use. The equipment needed to be extremely

fast and efficient to keep on target with project pace.

In other projects where Oak Park worked as the sub-

contractor, the primary contractor supplied the rock

drill. However, too often the drill significantly lacked

manoeuvrability, reliability and efficiency. They could

take up to 5 minutes to drill a single hole which was not

fast enough for this project.

Oak Park decided to follow the advice of the principle

contractor, Folton Hogan who recommended the 210-3

SRA 3-gang slab rider drill from E-Z Drill based on past

experience. This model has a typical hole diameter of

5/8 to 2.5 inches (15.9 to 63.5 millimetre) and depth up

to18 inches (45.7 cm)

Before the project started, Shane Dunstan, executive

director of Aran Australia, recommended the 3-gang

slab rider drill to Fulton Hogan, the project’s principle

contractor. Fulton Hogan knew the benefits of the E-Z

Drill already, which is why they recommended it to Oak

Park, which purchased one.

With nearly 12,000 holes waiting to be drilled,

speed, reliability and manoeuvrability were key to deliver

the project and make it more profitable.

Keeping Up

Throughout the numerous stages of the project, Fulton

Hogan and McConnell Dowell poured 580 concrete strips

from 450 to 525 mm deep. The crew turned over the 5

m wide sections that ranged from 30 to 100 m in length

to Oak Park for drilling.

The E-Z Drill operator drilled sets of three holes — each

set taking less than 90 seconds - some 70% faster than

the previous equipment used.

Commenting on the progress, Renee Bell said:

“We drilled as many as 300 to 400 holes in one

stretch of concrete. When it was time to start

drilling, our E-Z Drill operator completed the

work quickly and this dramatically increased our

overall efficiency. This significantly reduced the

cost per hole compared to the old machine. The

slab rider has been a very productive purchase

for us.”

The drill has a patented tri-steering system and foam-

filled tyres that makes repositioning the drill easy for

operators. Plus, the auto alignment feature ensures that

workers do not require extra time to accurately space

holes.

The drill’s automatic shutoff stopped the drill motor

after reaching the desired depth. This prevents dry firing

and the multi-point oil injection system ensures each

drill motor has enough lubrication, reducing wear on

the drill motors, which minimized servicing downtime

for Oak Park.

When operators changed worn bits, the quick-bit

release guide allowed them to replace the bits in minutes

with minimal interruption to drilling.

E-Z Drill

Contractors World International Vol 7 No 5

22