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INTRODUCTION
Aurecon was appointed for the design and construction supervision of the Granger Bay Boulevard and Green Point roundabout that provides access for vehicles (public and private) and pedestrians to the Cape Town Waterfront and the new Cape Town (Green Point) Stadium. Due to the development of the stadium for the 2010 FIFA World Cup, provision had to be made for access to the stadium for large numbers of pedestrians in a manner which would remove the vehicle-pedestrian conflict.
The innovative solution to giving large numbers of people safe access to the stadium was to provide a pedestrian concourse under an elevated traffic circle. In conjunction with the urban planners and the architect, a concept was developed for a circular structure providing access from every direction, and with an element of a "human" scale, having features more like a building than an elevated motorway. The concourse would then become the focal point of an urban park, which would also form part of the redevelopment of the area.
SCOPE OF WORKS
The works for the construction of the Granger Bay Boulevard and Green Point traffic circle consisted of the following:
Road works
* Construction of approximately 1,2 kilometres of dual carriageway, four-lane arterial road, including three traffic circles, two new permanent signalised intersections, alterations to two existing signal installations and the construction of two Bus Rapid Transit (BRT) stations
* Accommodation of traffic, including the construction of a 0,5 km four-lane diversion, as well as the erection of temporary road signs and other traffic control devices (including a complete temporary signalised intersection)
* Construction, relocation and protection of existing and new utility services
* Construction of sidewalks and cycle paths
* Construction of a pedestrian plaza area and parking areas
* Hard and soft landscaping
* Provision of lighting for road, parking and pedestrian areas.
Stroctures
* Only one bridge structure, the reinforced concrete bridge at Green Point circle, formed part of this project and was constructed on top of the existing circle. The bridge is circular with a total length of 140 m, and with an overall deck width of 13,4 m.
* The reinforced concrete abutments and piers are founded on spread footings on rock at shallow depths. The bridge deck is of the...