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New Zealand
Sub-industry
Factories & Warehouses
Problems
Earthquake Remediation
Location
Christchurch, NZ
Year
2011
Solutions
Slab Lifting
Technology
Deep Injection, Slab Lifting
Warehouse Floor Raised and Re-levelled
Summary
The ground floor slab of this occupied food distribution centre was re-levelled without complication. The racking systems and machinery remained in place and operational. Our client was caused minimal downtime.
Objectives
Several areas within this food industry distribution centre suffered subsidence during the Darfield Earthquakes. The loading dock, the cold storage area, the north wall and the dry store had subsided. Tilt panel wall settlement of 90mm was the major concern. The slab settlement correction required was relatively minor because the main floor slabs in the cold storage section were post-tensioned, although the tilt panel slab footings required re-levelling.
Solution
Uretek Deep Injection and Slab Lifting methods were employed whereby proprietary, engineered structural resins were injected to correct the 1200m2 floor slab in the dry store, and the 600m2 loading dock. Laser level measurements were taken to ensure that various locations on the site were treated to achieve the desired lift and return walls to plumb, in accordance with the engineer’s specifications. The teams worked in confined spaces in the cold storage area, in addition to working in open warehouse areas and locations with racking systems in place.
All the warehouse areas and the cold storage area were re-levelled to within 10mm tolerances. This decision saved the client significant costs which would have been incurred, if he had decided to demolish and rebuild the facility.
Resources
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House Floor Raised and Re-levelled
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House and Garage Lifted and Re-levelled
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