REpairing Retaining Walls, Arches, Bridges and Homes| North and South Islands | New Zealand

Our REpair department serves to rectify common issues with ageing bridge & retaining wall structures, bridge expansion joints and deck seals, buried arches, culverts and pipes. And as the worlds’ infrastructure ages, there is an integral need for a company that can deal with the complexities surrounding remedial works on retaining structures, bridges, tunnels & water services on all scales, large or small.

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REpair of ageing civil and residential structures is something that separates us from other contractors.

The difference between the traditional geo-contractor and the operational capacity of retained earth is that we operate in both small-scale residential and large scale commercial. We are content in bringing superior levels of service across the board.

A bridge is just as important as your home. Therefore, we apply the same level of expertise across all projects — regardless of the size of the job or contract value.

We remedy critical failures such as overturning or sliding, rupture, cyclic fatigue, mechanical disturbance, water-ingress issues such as concrete cancer & scour (soil loss through weather/ water), subsidence, concrete panel structural or connection-point failure, general cleaning and maintenance including anti-graffiti treatments, acid sulfate reactivity, sealing and general surface treatments.

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REpair of civil structures is of utmost importance. retained earth have the know-how to complete technical remediation of existing structures.

retained earth are qualified to also carry out underpinning and rectification of structural defects through methods of remediation & prevention; extending intended design life and reinstating structural integrity to existing bridge abutments & components, grade separations, arches, culverts, and other systems of retention and slope stabilisation.

The Advantages of the retained earth CellWall™ Gravity Retaining Wall System

The retained earth CellWall™ system is a mass-gravity type retaining wall array that is comprised of cast reinforced concrete units, formed to specific size and dimension, which are then combined by utilising our proprietary construction methods.

By controlling design, manufacturing and installation, retained earth focus the ‘bulk density’ approach to the retaining and stabilisation of slopes and embankments. Our system, in its unique composition, performs specifically for high deflection situations as required for sea walls, rail bridges and road-side retaining structures such as bridge abutments and grade separations.

The CellWall™ system is perfect for sites with soft soils, rock foundations and sites with limited access.

Walls such as crib walls and gabions (see pictures below), which also are designed and constructed utilising the mass-gravity method, perform very well in their functions but still allow scour to occur. The retained earth CellWall™ system, eliminates the risk of scour by adding density to our design block.

This simple solution reduces voids in the block and therefore is also very effective at controlling the establishment of vegetation in the face of the wall structure. This, when it occurs on similar mass-gravity structures, can cause further costs for private and public assets.

With no large root masses invading the wall structure, the CellWall™ system will outperform alternative gravity wall systems.

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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.

Want to maximise your usable land? Try a retained earth retaining wall

When working with an earthmoving company, you may hear the terminology “cut & fill”. This basically means as it sounds; some areas of work are to be excavated which is indicated by the word ‘cut’ and other areas that are to be filled, and well, you know the rest.

By doing this in a certain way, you can maximize the amount of usable, and more possibly, load bearing land in which an extension or another structure can be built on to increase the overall value of your block. This is even more critical for older blocks that have matured but nonetheless it is also a widely occurring function when building on a new block.

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A small garden wall complete with new turf!

Concrete retaining walls by retained earth help to provide a long lasting and aesthetically appealing option when considering the various types of retaining systems on the market. Our systems utilise both cantilever anchorage and gravity itself as a means to secure an area of fill. In saying this, we also have cut zone ready retaining systems.

Contact retained earth for further information.

Concrete Retaining Walls with textures and colours

With an appealing natural selection of colours and finishes, retained earth has a great selection of stylish retaining walls which are made to last.

By focusing on creating the most sustainable product, retained earth have incorporated many colours and textured finishes which will prolong the appeal for any of our concrete faced retaining walls.

How it looks is only second to how it performs. With a design life of up to 100 years, our CELL WALL™ retaining wall system, standard sleeper wall with post and any other concrete-finished retaining structures

via panel finish