Micro Piling

On sites with restricted access or low headroom or with restriction on fumes or where heavy plant is prohibited, foundations may be constructed using a micro piling/mini piling option as this is often the only viable alternative with minimal vibration. 

Micro piles can typically be installed using small scale piling rigs able to work in limited access or for low headroom piling. Our micro piling machine can access most areas inside a house, inside basements or low headroom sites in under 2.5m tight site access or difficult site. We can drill piles from 250mm diameter to 450mm diameter up to a depth of 20m.

Significant use of micro piles has been done in seismic retrofitting applications in earthquake zones. It can be used for foundation upgrades, refurbishment works, temporary and permanent piling applications for both tension and compression loading and are well suited to a wide variety of ground conditions. They can be installed with small piling rigs and can be raked or angled.

Types

• Underpinning piles
• Low headroom/difficult access piles

Application

• Difficult access
• Low headroom
• Seismic retrofitting applications in earthquake zones
• Used for foundation upgrades
• Refurbishment works
• Temporary and permanent piling applications for both tension and compression loading

Projects

Project Name - Rydges Hotel, Auckland
Project description Drill 5 x 450mm diameter x 16m deep micro piles to underpin and strengthen existing foundations Machine used MTrack Special difficulties A challenging project as drill heads had to be altered to penetrate through rock and there was limited head height

Project Name - Warwick Street, Westmere
Project description Drill 12 x 450mm diameter x 6.5m deep house piles for basement Machine used MTrack Special difficulties Limited headroom

Project Name - New World, Remuera
Project description Drill and constructed 20 piles for refurbishment of supermarket Machine used Yanmar 1.5T Special difficulties Confined space, work had to be carried out through the night before opening the next day and aisles had to be kept clean

Project Name - Lift shaft at Great South Road, Manurewa
Project description Drilling a lift shaft in concrete floor Machine used MTrack Special difficulties Commonly used in residential housing and light commercial buildings for drilling to install casings inside pile hole for lift shaft rams