Riverfields Boulevard Underpass
Tridevco (Pty) Ltd. appointed VIP Consulting Engineers to investigate, plan, design, obtain sanction from the various authorities and supervise the construction of an underpass structure that would provide a link between the two areas, east and west of the R21, and comply with the requirements of the traffic study and Traffic Master Plan.
Riverfields Boulevard will pass under the National Road R21-2 which is ± 660m south of the existing R23 route overpass in the Ekurhuleni area.
The proposed construction method is to construct a temporary bypass on which the traffic will be diverted. The underpass structures for both carriageways will then be constructed, completed, where after the bypass will be demolished.
In order not to disturb the existing supporting earthworks, the abutments will be founded on cast in-situ augered piles. The pier columns will likewise be founded on piles. The soffits of the deck have been designed to a curved radius to provide a pleasing arch effect.
Prestressing the deck was not considered as the long term creep effect would require almost continuous maintenance to the end joints and in effect the roadway.
The project will start in February 2014 and will take 14 months to complete.
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