You are here

Ground Improvement Trials: The full story

The liquefaction from the Canterbury earthquake sequence has had a devastating impact on homes and communities. As part of its research function, EQC investigated ways to strengthen the ground to reduce the damaging effects of liquefaction.
The ground improvement trials (GIT) were conducted to ensure the proposed solutions were technically viable for use on residential land. A range of ground improvement methods have been trialed in Canterbury to see if they offer a solution to liquefaction-prone land.

Two main methods of testing were used:
• earthquake simulator or T-Rex – find out more
• ground blasting – watch ground blasting in action

Chapter 1: Introduction

Liquefaction damages homes by weakening the ground underneath. The ground improvement trials looked at existing large-scale ground improvement techniques, such as those used on bridges, tunnels and commercial buildings to see if they could be adapted and used on residential properties. Find out more in the video.

Chapter 2: The techniques

EQC tested many techniques. Three of those yielded promising results. Learn the details of the techniques in the video: 


Chapter 3: Next steps

When the trials were finished, EQC then moved on to the Ground Improvement Pilot (GIP). This involved testing the methods in real-world settings to make sure they were practical. Find out how in the video:








Chapter 4: International experts involvement

The ground improvement trials were strongly supported by international experts. Hear from them in the video:

Chapter 5: Methods of Repair

Page last updated: