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The First True Bridge Abutment with Polymeric Reinforcement in South Africa is Maccaferri’s MacRes® System

macres

Our vertical concrete faced MSE system was used to build a one-of-a-kind structure at Lanseria International Airport, Johannesburg. We will present this project at the 11th IGC in Seoul, Korea in September

This first true bridge abutment using polymeric reinforcement in South Africa has been constructed using our MacRes® and ParaWeb®. The abutment is the cornice to the new entrance to the Lanseria International Airport, in the North West of Johannesburg, South Africa. It serves to allow commuters access to the parking area without having to cross the access road.

Our MacRes® system for vertical soil reinforcement structures consists of high-performance ParaWeb® polymer geostrip linear reinforcement connected to large concrete facing panels. The geostrips are manufactured from high tenacity, multifilament polyester yarns aligned and co-extruded with a LLDPE sheath to form polymeric strips. The geostrips are placed between compacted layers of structural backfill, and are intimately connected to the pre-cast concrete fascia panels.

Our reinforcements have been intensively tested since 1976 and used for the construction of Mechanically Stabilised Earth (MSE) retaining walls. The MacRes® system has been used on projects worldwide for various applications such as bridges (wing walls and abutments), railways, highways, airports, quarries and other industrial areas.

Our MacRes® MSE wall system outperforms traditional reinforced concrete structures because it offers several benefits, including high resistance against corrosion and increased durability of all components, giving a project working life up to 120 years even in chemically aggressive soils. Moreover, our system offers rapid deployment and installation and does not require specialized equipment or experienced labor. Combined with its simplicity and design efficiency as well as the possibility to use lower quality backfill in reinforced zone, MacRes® offers considerable construction cost savings.

To fine tune the best design for the Lanseria Airport true bridge abutment, our engineers worked closely with DeltaBEC, the lead consultant.

With a maximum height of 3.5 m and a total face area of 496 m2, the wall was constructed in just two months by EIS Engineered Interlock Solutions.

For this application of MacRes® we were responsible for the design of the walls, the supply of ParaWeb® reinforcement, accessories and concrete panels as well as the management of the project. We also undertook the professional indemnity insurance for the MSE walls in accordance with the Engineering Council of South Africa (ECSA) requirements.

This is a clear example of how our motto of “Engineering a better solution” can lead to excellent work.

The Lanseria Airport project will be presented at the 11th International Conference on Geosynthetics (ICG), taking place in Korea in September 2018.

For more information, please contact us.

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