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Ground Improvement Pilot

EQC worked with a number of insurance companies including Tower, IAG, Lumley, Vero, Southern Response and AA to investigate how practical it was to use the trialled methods that were identified as promising in real-life situations. 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 to assess local contractor capability.

In all, six different 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

• 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
• inclement weather can cause delays

 

Ground Improvement: Cement soil mixing (cleared section only)

• takes approximately one week
• requires specialist equipment
• no stockpile required

 

Ground Improvement: Rotovated soil mixing (cleared section only)

• takes approximately one week
• does not require specialist equipment
• requires stockpile area

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