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IN preparation for the construction of residential, community housing and commercial developments in Sunningdale Phases 12A, 13 and 14 – opposite the Table Bay Mall in Cape Town’s western suburbs – major work to upgrade the R27 and Big Bay & Berkshire Boulevards intersection has been completed.
Undertaking the R44-million plus intersection upgrade was Baseline Construction on behalf of the developers, Garden Cities NPC who covered the cost as part of its Services Agreement with the City in lieu of development contributions.
The project took approximately 60 weeks and the scope of work was extensive besides roadway improvements which involved the addition of lanes and partial duelling of the respective roads approaching the intersection.
A portion of a new bulk stormwater pipeline was also constructed which in future will route stormwater runoff from Sunningdale Phases 12A, 13 and 14 to the existing Big Bay outfall pipeline located at the eastern boundary of Big Bay.
Upgrade of the intersection
The scope of Baseline’s scope of work included the construction of:
Bulk stormwater pipeline
The construction of the bulk stormwater pipeline consisted of the laying of approximately 300m of 1 050mm diameter concrete pipes and manholes.
The pipe excavation depth of the bulk pipeline ranged from 1,5m at the inlet, increasing rapidly to a depth of 4,2m at the termination point. The pipeline crossing the R27 was installed by means of trenchless technology with a cover of 1.94m – 2.34m to the road finish level.
Planned developments
Garden Cities Group Manager: Engineering & Planning Renier Smith outlined the extent of the development.
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