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Piling works

The Ipswich Motorway Upgrade Rocklea to Darra—stage 1 project will need to upgrade, raise and widen 7 bridges which all require piling works to create a solid, supporting foundation.

Piles are penetrated deep into the ground to reach a strong layer of rock or soil to better support large structures such as buildings or bridges. Different piling methods are used depending on the type of structure being built and the type of soil the foundations are placed on. The number of piles required to support a structure also depends on these factors.

A number of piling methods will be used on bridges across the Oxley Creek floodplain.

Types of piling

Driven piling

Involves hammering a pre-cast (or pre-made) concrete pile into the ground until the pile hits resistance and no longer moves. This method of piling is generally noisy with a repetitive banging sound as the piles are driven into place.

Bored piling

A permanent steel lining is driven into the ground via vibration or hammering. A piling rig then drills into the ground to create a hole, removing dirt as it goes deeper into the ground.

Once this is completed, a steel pre-fabricated reinforcement cage is lowered into the hole and concrete is poured into the hole to form the pile. When the concrete cures, the bored pile is complete.

Sheet piling

This process uses vibration to drive interlocked sheets of metal into the ground to form a barrier similar to a retaining wall.

This method is often used when construction activities are close to existing structures because it results in minimal disturbance to the ground and does not require any material to be removed.

Impacts of piling

Piling can result in increased levels of noise, vibration and dust in surrounding areas.

Vibration may be felt in nearby buildings. Should you feel vibration in your property due to construction activity, there is no immediate cause for concern.

Every effort will be made to minimise construction impacts and monitoring will be carried out during piling works.

While the majority of piling works will be carried out during the day between 7am and 5pm, Monday to Saturday, some piling works will also be required at night when traffic flows are at their lowest. Night works help minimise impacts on motorists and provide a safe work area for construction crews.

The project team will ensure local residents are notified before any noisy night works are scheduled.

Last updated
07 January 2019