RETAINING WALL SUPPORTING A630

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Mass Gravity Retaining Walls

SHEFFIELD - YORKSHIRE - United Kingdom

Highways England / Sheffield City Council

Balfour Beatty

WSP

RETAINING WALL SUPPORTING A630

Problem

The A630 Rotherham Gateway / Sheffield Parkway was to be  widened to reduce congestion, cut carbon emissions and   provide better access to an adjacent innovation and   manufacturing area. This road to the south of Jn 33 of the   M1 was to be widened to 3 running lanes, which required retaining walls along the southern side to support the   highway. Maccaferri were approached by the project team of Balfour   Beatty and designers WSP to assist in the project. 

Solution

A PVC-coated welded mesh mass gravity gabion wall was  originally proposed within the design. However, the PVC   coating on welded units is only 0.25mm thick. Maccaferri   proposed gabions with a 0.5mm thick PoliMac coating and   which offers a design life of 120 years in a C4 environment. 

The overall length of gabion walling was over 500m, split   into 5 walls of up to 3m total height. The gabions were filled   with hand-placed locally sourced stone to provide a high[1]quality attractive dry-stone wall-type finish. 

PoliMac is an advanced polymer coating that offers far   greater technical performance than PVC coatings: 

10x abrasion resistance 4x the better elongation after UV   exposure Greater resistance to chemical attack Does not   have phthalates in its manufacture. 

Greater flexibility at very low temperatures Maccaferri   gabions have BBA Certification and an EPD Certificate   (Environmental Product Declarations – www.environdec.com) which provide transparent third-party assessed declarations   on the emissions generated during their manufacture.

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