Commercial Building Subsidence Remediated INDUSTRY
Office building PROBLEM
Earthquake remediation LOCATION
Christchurch New Zealand DURATION / YEAR
23 days / 2014 TECHNOLOGY
JOG ComputerControlled Grouting BUSINESS UNIT
Mainmark New Zealand
Summary A building in this commercial complex of ten units in Christchurch had suffered differential settlement of up to 178mm with the 2010-2011 earthquakes. It was rectified using JOG Computer-Controlled Grouting to raise the building up precisely to the required level.
Objectives The task was to raise one of the buildings in this complex evenly without compromising the structure in any way, and so correcting the settlement and relevelling the building. A particular consideration was the need to avoid moving the next door building that was less than a metre from the back of the affected building.
Solution The JOG Computer-Controlled Grouting levelling system was used to level the tilted, differential settlement of the structure. The fine degree of control offered by JOG allowed the substantial lift of the building to not affect the adjacent property.
Robotic survey stations were established above the other building of the complex to pick up level data from the many survey prisms set up on the building being lifted. 74 JOG injection ports were installed through the concrete foundations, where the high mobility grout was introduced. The maximum lift was 178mm and the average was 110mm. The structure was re-levelled successfully, returning the building to design levels, while leaving the neighbouring property unaffected.
Figure 5: Annual Variation of Air Change Rates (BLAST Methodology) . ..... 1 Email exchange between David Winiarski and Peter Ellis, May 27, 2008. 10 .... EnergyPlus simulation software based on the linear wind velocity coefficient.
of applicable local and national Building Codes. Within New Zealand this warranty is for a period of 50 years. Who will carry out and be responsible for the work? The work will be carried out by Mainmark, using our own experienced technicians and Qua
Multi Story Building Re-levelled by JOG continued. Z14 Y435. All injectors were connected to the central computer control unit, where the operator individually controlled and manipulated the quantity of grout supplied and cure times to individual inj