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New Zealand
Sub-industry
Factories & Warehouses
Problems
Earthquake Remediation
Location
Christchurch, NZ
Year
2013
Solutions
Void Filling
Technology
JOG Computer-Controlled Grouting, Slab Lifting, Void Filling
Warehouse Earthquake Damage Remediated
Summary
A large retail warehouse building constructed of precast tilt panels supported by pad footings and beam construction had experienced differential settlement of up to 60mm along approximately 250 lineal metres of the perimeter foundations due to the recent seismic events.
Approximately 800m² of the internal floor slab-on-grade also required void filling and level correction.
Objectives
Firstly to correct the settlement along the 250m perimeter section and secondly to fill all voids under the 800m² of floor and to re-level the area.
It was essential to absolutely minimise interruptions to public, retail operations.
Solution
JOG Computer-Controlled Grouting
A continuous circuit of 64 injectors were installed beneath the foundations of the building to facilitate a lift that was uniform, incremental and controlled. Continuity of foundation support was maintained throughout the correction.
JOG operations were carried out during daylight hours from outside the building to minimise any interruption to the tenants’ daily operations.
The URETEK Method
Void Filling and Slab Lifting operations were completed at night outside of the tenant’s normal trading hours.
Resources
Download a pdf version of this project here
Warehouse Earthquake Damage Remediated
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