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New residential townhouse development, Manurewa, Auckland

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Foundations and retaining walls were required for a new residential development of two and three storey townhouses in Manurewa, Auckland.

TTT Deep Pile Foundations being installed for a new swimming pool facility.
Our solution

MultiPole SED poles, 1.8 to 3.0m x 175 and 250mm, 270 pieces, were used for the Retaining Walls.

MultiPole Uglie poles, 3.6 to 6.0m x 175 and 250mm, 900 pieces, were used for the Deep Pile Foundations.

MultiPoles are incredibly versatile timber poles with a unique hollow core.

MultiPole SED poles are naturally tapered, machine-peeled poles. Minimal wood is removed during processing so each pole retains its strength.

Project challenges

The townhouses were to be built in close proximity to existing services.

The foundation solution for each townhouse needed to support a 150mm thick concrete slab.

The ground conditions were soft, with uncertified fill.

Existing services were within 1.0m of where the piles were being installed.

The site was located close to a school so noise restrictions were in place.

 

Piles had to be installed close to adjacent properties, but installation was not allowed to impact on these neigbouring properties.

Installation needed to be rapid.

Unloading and handling needed to be easy.

H5 treated Radiata Pine timber piles were determined as the best solution.

TTT Deep Pile Foundations being installed for a new swimming pool facility.
TTT Deep Pile Foundations being installed for a new swimming pool facility.

MultiPole Uglie poles are similar to SED poles but are debarked rather than peeled. They offer greater skin friction when used as piles and are stronger than SED poles.

The unique hollow core of the MultiPole allowed for fast installation via high-frequency vibration. This method of installation resulted in minimal disturbance to the neighbouring properties and no pre-drilling was required.

The piles were installed under the load bearing walls approximately 1.5m apart.

The MultiPoles were installed to a minimum set as calculated using the Hiley Formula.

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