Foundation Specialists

Bored Piles

Bored Piles are non-displacement piles capable of carrying large vertical loads and are particularly efficient and cost effective when boring into cohesive soils.

Pile diameters range from 300 mm to 3.0 m.
Pile lengths to a depth of 90m.
Rig weights range from 11t to 170t.

Applications

Bored Piles offer larger diameter piles than any other piling method and permit pile construction through particularly hard strata. Where unstable strata is encountered temporary or segmental casing and permanent steel liners, bentonite slurry or polymers may be used for bored piling.

Bored Piling is a popular foundation system for bridges and tall buildings. It is also applicable to retaining walls, secant, contiguous and soldier pile walls.

Bored piling is a progressive system of drilling and withdrawing the auger until the desired depth of pile is reached. In most cases excavated material is being verified and the pile base is cleaned before placing the reinforcement steel and pouring the concrete.

Advantages

  • Low noise and Vibration.
  • Very high capacity.
  • Able to penetrate strong Bedrock.
  • Suitable for tension loads.
  • Cost-effective piling technique.
  • Minimal site preparation.
  • Ideal for foundation and piled earth retaining systems.
  • Restricted access capability.

Victoria Park Drive Bridges Modifications, Burswood, WA

  • Driving casings with vibratory hammer
    Driving casings with vibratory hammer
  • Bored pile drilling under fluids using polymer
    Bored pile drilling under fluids using polymer
  • Site team - Hard at work..
    Site team - Hard at work..

Project Outline

Products / Services
Bored Piles

In order to service the new Perth Football Stadium, Belmont Park Station on the Perth to Armadale railway line is being expanded to provide dedicated platforms for event goers. This involves increasing the number of railway lines that pass through the station from two to six. In order to do this, the bridge that carries Victoria Park Drive above the station has to be expanded to accommodate the additional tracks. In addition, a pedestrian underpass is being constructed beneath Victoria Park Drive to provide access to the stadium from the station.

Scope of Works

Avopiling was required to install a total of 247 piles forming five contiguous pile retaining walls for the new bridge abutments. In addition a further 11 piles were installed beneath load bearing piers. Pile diameters varied from 600mm to 900mm and they were installed to various depths, some exceeding 35m.

Temporary casing was vibrated through the fill materials from which the existing bridge approach embankments had been constructed. Beneath the engineered fill forming the embankment lay uncontrolled fill comprising medium to high plasticity sandy clay interbedded with layers of sand. High plasticity clayey silt known as Swan River Alluvium lay beneath the fill materials, which in turn was underlain by medium dense silty sand. The deeper piles were founded in very dense Kings Park Formation sand.

To support the pile bore in the deeper natural materials, Avopiling used a polymeric drilling fluid.

All this took place in a very confined site with live traffic running alongside the piling works and passenger trains passing beneath the existing bridge. Close collaboration with Lend Lease ensured that traffic switches between the westbound and eastbound carriageways took place with minimum disruption and maximum efficiency to the piling operations. To meet the programme constraints of the northernmost part of the bridge expansion Avopiling worked seven days per week to ensure that Lend Lease was able to meet its contractual obligations.

One One One Eagle Street, Brisbane, QLD.

  • BG40, R-930, HS885 working side by side
    BG40, R-930, HS885 working side by side
  • Aerial Photo
    Aerial Photo
  • Cutter operator - controlling the Trench Cutter in real time
    Cutter operator - controlling the Trench Cutter in real time
  • Diaphragm wall - 6 levels of basement excavated
    Diaphragm wall - 6 levels of basement excavated

Project Outline

Located at the heart of Brisbane’s exclusive riverfront setting and the Central Business District (CBD), this iconic and modern building is centrally located with a wide range of amenities and services, both within the building and close by as well as being on the door step of the well established Riverside Precinct.

Scope of Works

Design and construction of Diaphragm wall (83m of guide wall and 1200m3 of diaphragm wall) total number of 27 panels 640mm x 2800mm, the max excavation depth 24m. Up to 10m of rock cutting, in excess of 220Mpa.

Project examples

Victoria Park Drive Bridges Modifications, Burswood, WA

Victoria Park Drive Bridges Modifications, Burswood, WA

WA

In order to service the new Perth Football Stadium, Belmont Park Station on the Perth to Armadale railway line is being expanded to provide dedicated platforms for event goers....

Project examples

Perth City Link, Perth, WA.

Perth City Link, Perth, WA.

WA

Perth City Link, formerly known as the Northbridge Link, is a collaborative project funded by three tiers of Government and led by Metropolitan Redevelopment Authority and the...

Project examples

One One One Eagle Street, Brisbane, QLD.

One One One Eagle Street, Brisbane, QLD.

QLD

Located at the heart of Brisbane’s exclusive riverfront setting and the Central Business District (CBD), this iconic and modern building is centrally located with a wide...

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Industry leading techniques and equipment

Our clients

  • Roads & Maritime
  • Department of Main Roads & Transport
  • Main Roads Western Australia
  • Lend Lease
  • Leighton
  • Thiess
  • Meriton
  • Queensland Urban Utilities
  • Transport for NSW
  • McConnell Dowell
  • OHL
  • Acciona Australia
  • Probuild
  • Brookfield Multiplex