CESA Aon 2019

PROJECTS LESS THAN R50 MILLION: SANI PASS

commendation

PROJECT TEAM Client Consulting Engineer

KwaZulu-Natal Department of Transport Royal HaskoningDHV/SFC Engineers/ Ndizani Civil Works Joint Venture Leporogo Specialist Engineers

Sub-Consultant

ARQ

Geotechnical Expert

Chris Africa Civils cc

T he KwaZulu-Natal Department of Transport is in the process of upgrading the existing Sani Pass, which transects the uKhahlamba Drakensberg Park World Heritage Site near Himeville. The main motivation for the upgrade is the high maintenance cost caused by gravel loss during high intensity rain storms, which result in periodic closures due to erosion. This submission is for the structures in Phase 2a of the project, which are from km 14 to km 25. The project consists of three phases. Phases 2 and 3 have been combined into one, referred to as Phase 2. Phase 2a extends from km 13,6 at the old Good Hope Trading Post, also the boundary of the World Heri- tage Site, to km 25 at the South African Sani Border Post. Phase 2b will extend to the summit of the Sani Pass at the Lesotho Border post at km 33. The client’s requirements were for cost effective and aesthetically pleasing structures, which could be constructed while accommodating public traffic. Innovative designs were provided to comply with the client’s requirements and accommodated difficult founding

conditions and restrictive environmental conditions. The construction of Phase 2a was split into two separate contracts: one for the structures and another one for the road- works. The structures contract consisted of the construction of seven culverts, one bridge and one Mechanically Stabilised Earth Retaining Wall (utilising gabion cladding) structure which incorporated a large box culvert. The construction contract for the structures has been completed, but the construction contract for the roadworks is still in progress. z

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CESA AON ENGINEERING EXCELLENCE AWARDS 2019