The aim of the pilot was to understand the practicalities of implementing the methods by coordinating the various parties involved, such as property owners, EQC, insurance companies and local authorities. This work was tendered out on a competitive basis to determine the affordability of the methods and assess local contractor capability.
In total, six ground improvement solutions were constructed on 31 residential green zone properties and two residential red zone properties in Canterbury. Watch the videos below:
Horizontal Soil Mixing - Ground Improvement Trial:
- the only method that can be installed directly underneath an existing home (i.e. the site isn’t cleared)
- takes a minimum of two weeks
- requires specialist equipment and contractor knowledge.
Ground Improvement: stone columns (cleared section only):
- takes approximately one week
- requires stockpile area and good front road access
- requires specialist equipment.
Ground Improvement: driven timber poles (cleared section only):
- takes less than one week
- does not require specialist equipment
- requires stockpile area.
Ground Improvement: deep gravel raft (cleared section only):
- takes less than one week
- does not require specialist equipment
- can be delayed by inclement weather.
Ground Improvement: cement soil mixing (cleared section only):
- takes approximately one week
- requires specialist equipment
- does not require stockpile.
Ground Improvement: rotovated soil mixing (cleared section only):
- takes approximately one week
- does not require specialist equipment
- requires stockpile area.
