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Project Profile Z13 Y022

3-Storey Home Unit Block Re-levelled

Sub-industry
Factories & Warehouses
Problems
Earthquake Remediation
Location
Christchurch, NZ
Year
2013
Solutions
Void Filling
Technology
JOG Computer-Controlled Grouting, Slab Lifting, Void Filling

3-Storey Home Unit Block Re-levelled

Summary

This three-storey home unit block in Auckland had subsided as much as 80mm in some sections. It appeared that a number of large trees on the corner of the site had contributed to the subsidence.

Mainmark re-supported and re-levelled the unit block and the adjacent paving with injection of expanding structural resins.

Objectives

The main objective was to raise and re-level the three-storey building without disturbing the residents. Secondary objectives were to strengthen the foundation ground and to re-level the pavement.

Solution

Working with a geotechnical report provided by a consultant to the Body Corporate, Mainmark applied Uretek Deep Injection and Uretek Deep Lifting with expanding structural resins to re-support and re-level the external wall footings. Ten external injection points were required.

Uretek Slab Lifting was used to re-level and re-support the slab flooring. This was carried out from 27 internal

injection points. The injection zones are shown on the site sketch.

The main objective was to raise and re-level the three-storey building without disturbing the residents. Secondary objectives were to strengthen the foundation ground and to re-level the pavement.

Resources

Download a pdf version of this project here

Apartment Building Subsidence Remediated
Next Project

School Building Foundations Strengthened

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