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CEMENT & CONCRETE
Precast concrete triple bases, each weighing 8.2 t
Experts in bespoke culverts
R
enowned for manufacturing specialist precast products, Rocla recently supplied South Africa’s largest customdesigned jacking culverts for a municipal project in Pretoria. This same ingenuity was adopted by Botswanabased sister entity Kwena Rocla, which was recently awarded a contract to design, manufacture and supply purpose-built culverts for Jwaneng diamond mine. “With Komatsu 930E tippers at 530 t fully loaded, we had to ensure that our culverts could withstand this loading, as well as accommodate the electric shovel used, bearing in mind the fill is only 1.2 m,” says Philip Smith, operations manager/director, Kwena Rocla. “We also had to meet the challenge of the culverts having to stand on double and triple base slabs due to the soil conditions experienced. We created special moulds in order to produce these slabs,” Smith continues. Kwena Rocla supplied 102 units of 2 000 x 1 000 at 1.2 m fill culverts, 244 units of 2 000 x 1 500 at 1.2 m fill culverts, and 288 units of 2 000 x 2 000 at 1.2 m fill culverts. Additionally, 217 of 2 000 double bases and 72 units of 2 000 triple bases were supplied. Kwena Rocla produced and delivered these bespoke culverts ahead of deadline. Significantly, zero incidents/LTIs were recorded on-site and at the factory. A 2 000 x 2 000 culvert
A triple base grid laid out for inspection
IMIESA January 2021
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