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TTT Ground Improvement

We’ve engineered a simple, affordable way to improve your ground to TC2 levels and prevent liquefaction during a future seismic event.
How it’s done

TTT Ground Improvement consists of closely spaced TTT MultiPole Uglie piles that reinforce in-situ soils against the seismic induced strains that trigger liquefaction.

We’ll use high frequency vibration to install the piles to a specified height above or below ground.

If you’re planning on having a TC2 concrete slab we’ll place compacted gravel on top of the piles. If it’s a timber floor you’d like we can install additional piles in-between ground improvement piles to receive bearers.

Benefits of this system

•  Typical pile installation time of 3 days.

•  Can be designed for more than 300mm of lateral movement.

•  Non-damaging, non-disturbing installation.

•  Uses award-winning TTT MultiPoles.

•  PS1, PS3 and PS4 provided.

Timber pole ground improvement is included in MBIE Guidance April 2015 as a Type G5 ground improvement method.

Additional design options

If your site is likely to experience more than 300mm lateral movement in a future seismic event, extra rows of piles can be added on the side(s) of the building that are most susceptible.

If you need Deep Pile Foundations as well as Ground Improvement, we can install additional piles that reach an identified competent bearing layer.

Find out more about Ground Improvement

Quick reference information
Technical category Type of MultiPole used Typical pole diameter Typical pole length Typical pole spacing Typical installation method
Residential foundations TC2 & TC3 Uglie 200–300mm 2.4–4.8m 1.0–1.5m High frequency vibration
Commercial foundations TC2 & TC3 Uglie 300mm 6.0–15.0m 1.0–2.5m High frequency vibration
  • Compare quick reference information

    Foundation system Technical Category Type(s) of MultiPole used Typical pole diameter Typical pole length Typical pole spacing Typical installation method
    TTT Deep Pile Foundations Residential foundations TC2 & TC3 SED 150–250mm 1.0–22.0m
    Poles can be joined
    to reach greater depths
    3.0–4.0m High frequency vibration
    Commercial foundations TC2 & TC3 SED 250–300mm 1.0–22.0m
    Poles can be joined
    to reach greater depths
    3.0–4.0m High frequency vibration
    TTT Ground Improvement Residential foundations TC2 & TC3 Uglie 200–300mm 2.4–4.8m 1.0–1.5m High frequency vibration
    Commercial foundations TC2 & TC3 Uglie 300mm 6.0–15.0m 1.0–2.5m High frequency vibration
    TTT Suspended Floor Foundations Residential foundations
    (as per TTT Deep Pile Foundations)
    TC2 & TC3 SED 150–250mm 1.0–22.0m
    Poles can be joined
    to reach greater depths
    4.0m High frequency vibration
    Bearers TC2 & TC3 UniLog 350mm To suit house dimensions 4.0m Fastened to
    scalloped pile tops
    TTT Raft Foundations Residential foundations TC2 & TC3 UniLog 250–300mm To suit house dimensions 2.0–2.4m 5 tonne excavator
    TTT Under House Piling Residential foundations TC2 & TC3 UniLog 180–200mm 1.0–2.4m
    Poles can be joined
    to achieve depths of 8.0m+
    1.0–4.0m High frequency vibration
    using compact piling
    equipment
    TTT Bridges Foundations TC2 & TC3 SED 150–300mm 1.0–22.0m To suit bridge dimensions High frequency vibration
    Bearers TC2 & TC3 UniLog 250–450mm 1.0–12.0m To suit bridge dimensions Fastened to scalloped
    pile tops

It’s just a few, easy steps toward a strong foundation

1

2

3

Geotechnical report

Site-specific design

Site visit and installation

First of all, we’ll need a geotechnical report for your site. If you don’t have one of these, we’ll help you get one.

This will be based on your geotechnical report, and could involve the customisation of one or more of our existing foundation systems.

Our installation processes are fast and efficient. They’ll have minimal impact on neighbouring properties and will leave your site undamaged.

4

Sign off

Issuance of PS3 and PS4 documentation.

You now have excellent foundations to build on!

START THE PROCESS TODAY

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