Book in your FREE, no-obligation site inspection. Contact us today for peace of mind.

Quick Enquiry Call Us

Search

If you cant find what you’re after please don’t hesitate to contact us.

Select Region

Please select the global region website you'd like to view.

Asia
Japan

Quick Enquiry

Submit your enquiry using our online form and include a brief message about the type of issues you are experiencing. One of the Mainmark experts will contact you as soon as possible.

Hidden
This field is for validation purposes and should be left unchanged.

Project Profile Z13 Y074

Supermarket Raised 180mm & 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

Seismic activity caused this Christchurch supermarket to suffer major differential settlement.

Mainmark successfully lifted the building utilising a combination of JOG integrated computer grouting and Uretek Engineered Resin Injection, thus returning the building to acceptable design levels as specified by our client.

The sand foundation ground of the building had liquefied, causing differential subsidence, as a consequence of the earthquakes of 2010 – 2011.

Objectives

To raise the building back to acceptable design levels; and the tension stresses, caused by the differing degrees of settlement, were to be released.

The structural integrity of the building was to be maintained throughout this level correction and uninterrupted store operations were to be maintained at all times.

Solution

JOG integrated computer grouting was employed beneath the load bearing elements from outside the building in daytime.

Uretek engineered expanding structural resins were injected beneath the internal floor slabs and footings, outside of the normal trading hours.

JOG

The building’s construction, distribution and degree of lift required, and mitigation against any new stresses being imposed on the structure throughout lifting, were all considerations in the design of the injection array.

Injection locations were installed via 40mm Ø penetrations through the footings.

During each sequence of hydraulic lift, only a relatively small amount of material was injected at each pass, at each of the locations, for gentle, even lifting of the whole structure. The greatest lift in a single area was180mm.

Uretek Resin Injection

Expanding engineered resins were injected beneath the internal floor slabs first to fill voids and then to raise them. This was done outside of the store trading hours through 16mm Ø holes to minimise impact on the client’s business. The supermarket maintained normal trading throughout the lifting works. The project was entirely successful in restoring levels and eliminating structural stresses.

Resources

Download a pdf version of this project here

Supermarket Raised 180mm & Re-levelled
Next Project

Multi Story Building Re-levelled by JOG

© 2024 The Mainmark group of companies. ‘Mainmark®’, ‘Terefil®’, ‘Terefirm®’ and ‘Teretek®’ are trademarks of the Mainmark group of companies.

Mainmark Ground Engineering (NZ) Ltd

Residential

Commercial

Solutions

Seismic

About Mainmark

Our team

Careers

Contact

Technologies

Media & Press

News

Awards

Privacy Policy

Terms and Conditions

Created by Codex