JOG Computer Controlled Grouting re-levels large commercial buildings in just five weeks
12 March 2018
Mainmark:
Ground engineering and asset preservation
specialist Mainmark has successfully re-levelled two large
commercial
buildings in under five weeks using JOG Computer-Controlled Grouting, a
non-invasive, highly precise system of grout injection. The two
buildings, part of a complex in
Melbourne, were remediated in a matter
of weeks which is remarkable given the complexity of the project.
JOG Computer Controlled Grouting is a highly advanced and proven
technology. Originally developed in Japan, where it is known as JOG
Integrated Computer Grouting, Maimark has used the solution extensively
in
New Zealand to successfully re-level large
earthquake-affected
structures including commercial buildings, civil infrastructure assets,
industrial sites and residential homes quickly and cost effectively.
Remediating large structures with weak or unstable foundation ground can be a slow, complex and cost prohibitive process. However, JOG Computer-Controlled Grouting is a very fluid yet fast setting cementitious grout that is quick to apply. No excavation is required, allowing the existing floor slab to remain in place with minimal disruption to the building’s occupants and owners.
JOG Computer-Controlled Grouting
is customised for the conditions presented on site and is ideal for
sandy, silty soils or where heavy slab lifting is required. The process
is carried out as one continuous operation, where grout is automatically
circulated through narrow injection points, typically 25mm-40mm in
diameter. The injections are controlled using a central computer that
can monitor up to 128 points at any one time, allowing the structure to
be raised evenly, gradually ‘floating’ it back to level without causing
further stress to the structure.
According to Russell Deller,
Mainmark Group Manager, JOG, “We are very excited to see JOG
Computer-Controlled Grouting being used successfully in the Australian
market. It’s a proven solution that can lift very large, tall and heavy
buildings with pinpoint accuracy without impacting adjacent structures.
In New Zealand, earthquake correction works use the most innovative
solutions to remediate buildings and JOG Computer Controlled Grouting
that integral to the relevelling of the
Christchurch Art Gallery project
for which Mainmark won the International Ground Engineering Project of
the Year award in 2016.”
In Australia, JOG Computer-Controlled Grouting continues to gain
momentum and recognition from within the engineering industry. The
commercial buildings in Melbourne are part of a complex that was
suffering from serious subsidence. Both buildings had become unstable
and the floors were unlevel with the ground floor in one building so
badly affected it began moving independently from the rest of the
building causing several ground floor windows to shatter due to
compression between the floors.
Mainmark was able to remediate the buildings using a combination of JOG Computer-Controlled Grouting and Teretek® resin injection. This complex project required a bespoke approach with the injections points being made using specialised drills to penetrate up to 2.7m beneath the foundations. As injections this deep are rare, extra-long drill bits needed to be custom made. Mainmark technicians successfully completed the entire project in less than five weeks without causing any disruption to the building’s tenants.
Other projects where JOG Computer Controlled Grouting has been used successfully include an aged care complex in Western Australia, in which the facility had considered demolishing the affected building. It has also been used to remediate a number of two storey residential homes where conventional soil stabilisation and re-levelling methods would have been cost prohibitive.
Mainmark draws on decades of industry-leading engineering experience and close collaboration with independent, expert consultants to interpret geotechnical information and complete risk assessments specific to a site’s ground conditions. Using these insights, an engineered solution is developed to meet the specific site requirements.
--ENDS--
Source: Mainmark - www.mainmark.com
Contact: For more information about JOG Computer-Controlled Grouting, visit https://mainmark.com/products/jog-computer-controlled-grouting/ or call 1800 623 312
External Links:
JOG Computer-Controlled Grouting, https://mainmark.com/products/jog-computer-controlled-grouting/
Christchurch Art Gallery, http://www.rebuildchristchurch.co.nz/blog/2016/7/mainmark-wins-global-ground-engineering-award-for-christchurch-art-gallery-re-level-project
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