Contiguous Pile Walls


Contiguous pile walls are used in situations where unstable soils and sands are present and retention is required. The walls are installed before excavation so adjacent buildings and structures are fully supported and protected from damage or collapse.

Contiguous pile walls are a line of unconnected but closely spaced concrete grout-injected or bored piles that form a retaining wall prior to excavation of a below-ground area.

The process causes minimum vibration.

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Concrete Grout Injection with a Continuous Flight Auger (CFA)


300mm, 400mm, 450mm and 600mm, drilling depth of 9m, 14-tonne highly-manoeuvrable drilling rig suitable for difficult sites.

Continuous flight auger piling has the advantage of minimum vibration and noise during installation and is suitable for closely settled areas. The constantly rotating auger retains the walls of a drill hole without requiring the insertion of a casing when used in conjunction with grout-injected piles. A concrete grout mixture is injected into the hole as the auger is withdrawn under pressure, thus forming a pile.

Concrete grout injected piles with a continuous flight auger rig can be installed through unstable and saturated soils and low to medium strength rock. This speeds up the process, requires less manpower and is a cost-effective solution to the construction of concrete grout injection piles.

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Soldier Piles


Walls are formed using the concrete grout injection method or bored piers. The piles are spaced along the wall at intervals of 1.0 - 2.4 mtrs using suitable materials to infill such as concrete panels, timber shotcrete.

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Foundation Piling


Foundation piling can be constructed using continuous flight auger grout injection drilling or bored piers.

For more information about Foundation Piling,  click here. 

Bored Piers / Bored Piles


400mm, 450mm, 600mm, 750mm, 900mm depth to 12m.

The highly mobile 12 tonne drilling rig is adaptable to a wide range of piling situations and difficult sites. Bored piles are founded into rock, providing an effective means of minimising foundation settlement with little vibration.

For more information on bored piers/bored piles, click here.