Landscape Amenity PRODUCT UPDATE


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PEDESTRIANISATION & HARD LANDSCAPING 11 Cape Towns World Cup stadium put on firm footing Tensar International’s TriAx™


Geogrid has been successfully installed by South African World Cup 2010 contractors to overcome poor load-bearing ground encountered on the new Green Point Stadium in Cape Town.


Construction of the


stadium, which will play host to a World Cup semi-final in July, was made problematic by the highly variable soil inherent to this spectacular ocean-side setting at the southern tip of the continent. Led by the joint venture of


Murray and Roberts and WHBO, the new 68,000-seater stadium was designed to be set into a deep excavation, to satisfy planning constraints relating to nearby buildings. Initial problems were encountered as a result of the excavated material being placed uncompacted over surrounding spaces. So, when temporary haul roads for access were routed over these areas, considerable ground movement was experienced. As some of these roads would become permanent roads for stadium access, the routes needed stabilising and because of the tight programme it was decided to carry this out early with the advantage that the haul roads would also benefit. The contractor had a choice of removing 6-8 metres of the fill, replacing it with properly compacted fill and bringing up to level,


or


constructing a mechanically stabilised road base with two layers of TriAx™ geogrid and


Tackling the potholes


After a 6 months trial Birmingham City Council selected Ultracrete Permanent Pothole Repair, as a suitable solution for roads, pavements, driveways and car parks where potholes need filling, naming it as one of the official products to be used on Birmingham roads.


Birmingham City


Council found the durability, flexibility and simple


Grasscrete for Green Build Parking The shift to “green build”


philosophy is making a big impact on sustainable car park design with local authorities looking for greener alternatives. As a permeable layer, grass


paving ticks the boxes increasingly presented as a pre- condition by planning authorities. Grasscrete’s proven track


400mm of locally-sourced high- quality aggregate. Choosing TriAx™ to reduce time and cost, this solution was deemed a success following extensive use over an exceptionally difficult winter. Even severe rain,


including a


58mm/hour storm, resulted in minimal settlement or deformation of the new access road. As a result of the project success, Tensar TriAx™ was also used by the contractors to provide localised load bearing support for parts of the stadium. For example, under the Grand Staircase


entrance up to the stadium podium, TriAx™ was used to reduce the required thickness of the proposed aggregate fill in the upper layers,


speeding the


construction and saving on imported aggregate. At another point of the Grand


Staircase, TriAx™ was used to reinforce the bedding under the steps and reduce any differential settlement which might compromise the structure and require remediation.Finally, where the ground slopes away towards the sea, a large block paved area was constructed with concrete


retaining walls capped by cast ‘jockey slabs’; these comprised cast concrete slabs placed along the perimeter of the wall, bridging the outer layer of fill and the compacted fill completing the base layer to the paving blocks.


Client: Murray and Roberts / WHBO Joint Venture Consultant: BKS (PTY) Ltd. Groundworks Contractor: Martin and East (PTY) Ltd


Tensar Click here to request literature


application of the product to be very effective. Application, a simple four


step process includes: 1) Ensure pothole is free of debris and standing water,


2) Apply


Ultracrete SCJ spray sealant to pothole edges (optional), 3) Apply the product slightly proud of the pothole, 4) Compact with a hand tamper, provides any contractor with a quick and effective way of repairing potholes.


Instarmac Click here to request literature


record extending back for forty years is one permeable system meeting approval. A quick look in the heart of


Dublin’s greenest location, Phoenix Park and many would be surprised to find a grass concrete system as the core structure of the large grass covered car park at


Farmleigh. The Grasscrete installation maintains a natural green perspective alongside a sustainable structure for daily traffic and potential heavy loads With its reinforced concrete cast on site structure Grasscrete was selected as the preferred system. Available in depths from 76 to 150mm the 100mm thick GC1 type was specified, with A252 (8mm diameter) mesh the surface would be able to cater for traffic up to 13.3 tonnes to include areas allocated to coach parking.


Grass Concrete Click here to request literature


CLICK HERE TO REQUEST LITERATURE


CLICK HERE TO REQUEST LITERATURE


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