Retaining Walls, Soil Stability and Seismic Systems | New Zealand

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Retained Earth – Global Stability

Retained Earth™ specialises in retaining wall construction, repair and maintenance. We are an experienced geotechnical construction company that works within the residential & commercial building, mining and civil infrastructure markets.

Retained Earth™ work intimately with local and international suppliers, partners and clientele through our extensive, collaborative network, without losing touch with agreed expectations and standards.

Retained Earth™ assesses, and remedies, all earthquake-prone structures. Besides our expertise in retaining structures and products, we also offer seismic, strengthening rehabilitation, structural and architectural expansion joints, and other construction systems and components that are working on public bridges and high-specification venues such as hospitals and schools as well as residential housing units.

 

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CELL WALL product page

 

Retained Earth™ supply, install, repair or maintain;

  • mechanically stabilised earth (MSE) walls
  • reinforced earth walls
  • reinforced soil structures (RSS)
  • mass gravity walls such as gabion units or gravity blocks
  • concrete sleeper walls
  • cantilever retaining walls
  • segmental masonry block walls

As shown above, Retained Earth™ offers a comprehensive and diverse supply, install and maintenance package for Residential, Civil, Mining and Public Infrastructure Retaining Wall and Earth Stabilisation projects.

 

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See our expansion joint category search for further detail

Expansion Joint Systems for New Zealand’s Seismic Building and Design Changes

By inherently factoring all aspects of the new seismic design and assessment criteria reflected in the Building (Earthquake-prone Buildings) Amendment Act 2016, which introduced major changes to the way earthquake-prone buildings are identified and managed under the Building Act 2004 throughout New Zealand, the joint systems Facade Interaction Joint utilises unique manufacturing and design to encapsulate and protect entire building facade envelopes from the effects of fire, wind and acoustics whilst compensating for thermal (low range) and seismic (high range) movement.

joint systems, in conjunction with some of the world’s leading architectural designers and product specialists, developed the Facade Interaction System specifically for the new changes to the Building Act (Amendment) in 2014 by adding a new level of acoustic performance to Preformed Polyurethane Expansion Joints. The Amendment in 2016 has been added after several years of strong seismic activity with the Public’s safety in mind.

The recent changes addresses New Zealand’s “Degrees of Seismicity” as they reflect three seismic risk areas or zones, and sets time frames for identifying and taking action to strengthen or to remove earthquake-prone buildings entirely.

Contact retained earth for further details on the retrofit and redesign of existing curtain walls and facade systems or for new build projects alike.

See more on the joint systems Facade Interaction System

Fix Faulty Expansion Joints | New Zealand | Joint Systems Expansion Joints

As a custom solution provider, joint system the expansion joint division of retained earth, through years of product development and project experience, can deliver retrofit expansion joint products for the repair and replacement of defective joint seals and sometimes as a result, dangerous situations for your patrons and employees.

Through cyclic fatigue, it is inevitable that the seals positioned in walls and floors will deteriorate, albeit, some quicker than others.

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Capable of high traffic loads, this cover plate solution was installed into the concourse level of a stadium structure. Equally as suited for car parks and private access bridges. Ask about our non-slip solutions.

Through our proficient procurement and product selection, combined with an OEM/ outsourced hybrid system capability, your building and your project will be better serviced on the whole as we are able to combine the best technology and products, combined in order to create the best functioning solution for your seismic or movement joints.

 

Being an ‘install-capable’ company, coupled with our in-house design, manufacture and supply capacities, our expansion joint service encapsulates all aspects. We can take you through the whole process, step by step. This ensures a highly efficient supply chain and business delivery mode.

 

Contact retained earth for further information on how we can assist you.

repair-expansion-joint-new-zealand (pdf download)

 

Expansion Joints and Seismic Compensators for Earthquake Affected Structures | New Zealand

image courtesy of newshub.co.nz

New Zealand is a highly seismic country with a long history of living with the constant presence of earthquake events. With the most recent event in Christchurch damaging a large amount of existing properties, some to a great extent, the National Building Codes have been adjusted to cater for new and improved regulations in order to further protect the public through the increased design and overall focus on seismicity.

retained earth are pleased to offer a vast array of product solutions relating to the protection from these earthquake events. With our product range including joint systems™ expansion joints and movement compensation systems such as reinforced and un-reinforced bearings, retained earth can design a suitable solution for both new build and retrofit/ remedial projects.

Contact us to help with your product or read more at https://retainedearth.com/seismic-systems/

Have a wall that is leaning forward? Repair Your Retaining Wall

Modes of failure vary when looking at repairing a retaining wall. Depending on the type of retaining wall, the approach to repair is best decided by either an experinced geotechnical engineer or an experienced retaining wall specialist.

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The beginning of failure. This retaining wall, although small, is not capable of retaining the soil behind. This is made worse by having to also hold up the fence above.

As most retaining walls in Auckland are made from timber, they are typically a cantilever system which utilises vertically-placed posts or sleepers to hold the retained embankment. There are mainly three types of failure with timber sleeper retaining walls; rotation, corrosion (rot and termite damage) and tree roots.

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Rotation, in this case due to tree roots, also affects concrete block retaining walls.

Following is a before and after repair job that we carried out. The original retainer, although built with treated pine, was termite ridden and rotten from moisture/ dampness. This was removed and replaced with a smooth, off form grey concrete sleeper wall which uses galvanised steel beams.

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Before…
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…After

The replacement retained earth sleeper wall also featured our heavy duty fence brackets to allow for rapid fence installation.

Contact retained earth for more details.