The South African National Roads Agency Limited (Sanral) is undertaking a number of road improvement activities in several provinces.
It has noted in a series of media releases that it has recently awarded a contract for the resurfacing of National Road R33, Section 6, from Mkhondo to Amsterdam, in Mpumalanga.
This project aims to reduce the travelling times and ensure smooth riding quality with improved skid resistance, the entity says.
The high-level scope of the project includes site establishment, traffic accommodation, pretreatment of the existing road, edge-break repairs and construction of edge beams. Major work includes the base and surface patches, bridge joints repairs, seal construction and the painting of new road markings.
Other works to be undertaken are clearing and shaping of existing open drains, construction of subsoil drains where required and clearing of hydraulic structures and finishing offroad reserves.
The tender amount for the project was R91-million. The appointed consultant is Royal Mndawe, with Roadmac Surfacing as the contractor.
Further, Sanral has also awarded a contract for the resurfacing of National Road R33, Section 7, from Amsterdam to the N17 Intersection, in Mpumalanga.
This project aims to reduce the travel times, provide good riding quality and improved skid resistance on this section of the road, Sanral states.
The high-level scope comprises site establishment, traffic accommodation, pretreatment of existing road-edge break repairs and construction of edge beams. Major work includes base and surface patches, bridge joints repairs, seal construction and the painting of new road markings.
Other works to be undertaken will include clearing and shaping of existing open drains, construction of subsoil drains where required, the clearing of hydraulic structures and finishing off the road reserve.
The tender amount was R122-million. The appointed consultant is SKI Civil and Structural Engineers with Roadmac Surfacing as the contractor.
In addition, the agency has awarded a R79-million contract to repair the Merriespruit steel-ribbed culvert on the R33, which washed out owing to inclement weather, to G4 Civils as contractor and LEO Consulting and Superstructures as the consultant.
At the same time that the new Merriespruit bridge is being built, Sanral will also replace the rusted steel-ribbed culverts on the adjacent Brakspruit and Barberskuil streams with brand new reinforced concrete bridges.
Sanral noted that, when the three bridges are completed, the R33 will most likely be the preferred route between Vaalwater and Lephalale, as it is 25 km shorter than the alternative route.
The project’s high-level scope comprises establishing a small materials testing laboratory on site, including providing facilities for the engineer.
An operational borrow pit will be established and three single-lane temporary deviations constructed at the site of each new bridge. There will be a manually operated Stop-Go through the day and traffic light-controlled signals at night.
Additional work involves building road and drainage works, three reinforced concrete bridges, the erection of guardrails, road signs and applying road markings and road studs. Work will be done on protecting the slopes and establishing vegetation, and testing materials.
NATIONAL ROAD R37
Sanral has also started with projects to improve and widen the existing single-carriageway road on National Road R37 between Burgersfort and the Modikwa mine turnoff.
The agency will upgrade the existing road and establish new intersections by building six roundabouts at the major intersections. Public transports stops will be built and will include bus bays and bus shelters.
The project's scope also includes building sidewalks from intersections to bus bays, the construction of two new bridges and the widening of one other bridge. This project aims to improve the safety of pedestrians. The final road section will have four lanes, surfaced shoulders and a painted island.
The contractor is Edwin Construction, and the consultant is Ilifa Africa Engineers. The tender value is about R600-million.
Sanral has also awarded a contract for the resurfacing of the National Road R37 from Burgersfort km 0.0 to km 14.0.
The project’s scope includes re-gravelling shoulders, edge-break repairs, building edge beams at property entrances, intersections and taxi bays, cleaning hydraulic structures and culverts, replacing bridge joints where required, applying temporary and permanent road markings, installing permanent road studs, repairing, renewing, or installing new guardrails and finishing off the road reserve.
The project will improve the smooth riding quality and skid resistance of the pavement. It will also enhance job creation during construction, says Sanral.
The project amount of R48-million was awarded to contractor Actophambili Roads. The consultant is Quantra Consulting.
NATIONAL ROUTE R510
Sanral has awarded a contract to improve the R510 from Bierspruit to Thabazimbi, in Limpopo.
This road passes through chrome, iron-ore and platinum mining areas and, therefore, carries high traffic volumes and a high percentage of heavy vehicles.
The main travelling benefits of the improvement are safety and shorter travelling times, increased passing opportunities from adding passing lanes and 3-m-wide paved shoulders, Sanral posits.
The project will widen the existing carriageway and provide surfaced shoulders and passing lanes; strengthen the existing pavement by reworking existing layers; improve vertical and horizontal alignments and drainage, upgrade intersections, and lengthen and upgrade existing minor and major structures where there is insufficient capacity.
There will be access materials for base and sub-base construction from stockpiles in the surrounding areas owing to mining activities along the road.
The tender amount is R458-million, the consultant is Royal Haskoning and the contractor is Raubex Construction.
NATIONAL ROAD R572 – SECTION 2
Lastly, Sanral has awarded contracts for the resurfacing of National Road R572 from Monte Christo to Rooigrond and from Rooigrond to Tom Burke, in Limpopo.
The high-level scope of the project includes the mobilisation period and site establishment, traffic accommodation, the required pretreatment of existing road-edge break repairs, constructing edge beams, base and surface patches, repairing bridge joints, constructing seals and applying road markings.
The contracts are valued at R82-million and R83-million, respectively.
The contractor is Roadspan Surfaces and the consultant Royal Mndawe.