by Simon Allen

Marine civil engineering boom in Africa

Project Focus

African marine civil engineering thriving
African marine civil engineering

Stefanutti Stocks Marine (a division of the Stefanutti Stocks Structures Business Unit), specialises in all types of marine civil engineering structures, often including both design and construction services.

Over the last two years Stefanutti Stocks Marine has continued to thrive in a challenging economic environment.

With increasing economic development taking place in Africa, the company has successfully completed numerous marine and harbour construction projects outside of South Africa, operating in areas as Malongo in Cabinda, Angola, and Pepel near Freetown in Sierra Leone.

Contracts have also been executed in Tanzania and Walvis Bay recently.

Although logistically very challenging, careful and detailed planning ensured that these projects were completed on time and within budget.

The Malongo Dock Expansion Project, in Cabinda, Angola (R600-million), was completed in the final quarter of 2010.

This project was a design and construct contract for Chevron, preceded by a front-end engineering and design contract also secured by Stefanutti Stocks Marine.

An "overhand" construction technique was used, working directly out to sea, whereby one works with the crane progressing along the front of the construction works, with materials being ferried up to the crane from land along the newly completed section.

Activities involved pile driving for the dock structure, sheet piling for the wave wall, and installation and concreting of precast concrete panels.

All precast work was undertaken in Cape Town and shipped to Angola to ensure a high degree of concrete quality and conformance to durability requirements. 

The Pepel Marine Works near Freetown in Sierra Leone (R154-million) were completed in December last year.

This was a joint venture with Bam International.

The design and construct project involved the construction of two new mooring dolphins, refurbishment of the existing jetty and the installation of 27 navigational aids some 25km downstream from the work location.

The joint venture made use of a 300 tone piling barge to drive the 63m long piles used to form the structure of the mooring dolphins

Working in a tidal river (with currents in excess of 2 m/s), and during the peak of the rainy season proved to be a challenge, but this was overcome with the combined experience of the team.

Other recent projects outside South Africa include Walvis Bay in Namibia (new fenders, scour protection and deepening of berths) and the Tanzania Ports Authority (new navigation aids at the ports of Tanga and Dar es Salaam).

Stefanutti Stocks Marine has also been kept busy here at home in South Africa with multiple large-scale expansion and refurbishment contracts currently taking place in the ports of Cape Town (at the Ben Schoeman Dock), Durban (at Maydon Wharf and Island View) and Richards Bay (at Berth 208). 

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