Screw Piling – Underpinning

Piling since 1994

  • All sizes for pools, houses, commercial, industrial, bridges & walkways
  • Professional & friendly technical advice
  • On-site, FREE job analysis
  • Fast quote and installation times
  • Engineers certification documents
  • Send your soil test and footing plans for a quote NOW.
  • Common screw pile capacities range from 5 to 200 tonnes; and can be installed with “Dingos”, loaders or excavators.
  • Foundation engineering is a combination of soil mechanics, engineering geology and pile design, and relies heavily on proper judgment derived from past experience and testing.

Underpinning since 1994

Underpinning is the usual remedy for foundations that have subsided, which causes cracking of walls and slabs.

Basically there are three methods of underpinning.

  • Screw piles with a sliding “L” shaped bracket under the footing. The bracket is jacked up and raises the footing. An advantage is speed of installation, less soil removal , Known load bearing capacity and re-adjustable.
  • Concrete filled bored piers with a cantilevered pad on top that protrudes under the footing. After curing, a jack is inserted between the pad and the footing and the building is raised. Disadvantages are that it is a slow process, lots of soil to be removed, difficult in high water table areas, and the heavy bored pier can slowly sink over time.
  • Pressure injection of chemical grout, epoxy or expanding foam into the soil and under the footing or slab. Generally a good solution but limited in deep soft soils; sometimes  needs to be repeated after a few years.

We use the screw pile method. The photos show a typical screw pile installation and also a corroded post replacement job.

~ Sunshine Coast Based ~

* * Full-time On-site Supervisors Have QBSA Licence * *

Division of Cantor Contracting Pty Ltd
QBSA Lic #1044678
( Foundations, Piling & Anchors )
(Structural Metal Fabrication and Erection)

Q-Pile Foundations and Hardarc Engineering are Trading Names for Cantor Contracting Pty Ltd

Here is what one of our recent clients says about us …

“Cantor Contracting worked with me in a professional manner from the time of the site inspection to the installation we worked together as a team to create a cost effective solution to a very difficult problem which involved an underground creek.

I couldn’t be more impressed.

I highly recommend Cantor Contracting”

Peter Curley of Peter Curley Constructions (Recent HIA Housing Award Winner)

screw-piling-area

screw-piles-screw-pilingUnder-pinning at rear of photo 3.0m retaining wall on LHS with no vibration installation