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IMPROVEMENT OF MOBILITY IN TALATONA, LUANDA

Cambamba River Bridge

The present crossing of Cambamba River in Rua da Vala, in Talatona, in Luanda, Angola, is frequently subject to overtopping due to heavy rainfalls, for this reason being known as “Wet Bridge”. Due to high traffic on that road, overtopping has had serious consequences not only on traffic jam, but also on people, vehicles and other goods that are dragged by the Cambamba River.

COBA Angola, in association with COBA Portugal, has developed the Final Design of a new Bridge over the River Cambamba, for Tecnovia Angola. The Client is the Ministry of Construction of Republic of Angola, through Direção Nacional de Infraestruturas Rodoviárias (DNIR).

Rua da Vala is an urban street with high occupation density on Benfica side after the left bank of the River Cambamba. For that reason, the street relocation will be over the present street and the new bridge will allow a safe crossing of the river, even in a centennial flood scenario.

The street relocation layout is 637 m long, with one lane per way, 3.50 m wide, 2.00 m wide embankment shoulders and 1.00 m in the bridge, and continuous footways with 1.50 m free width.

The bridge is formed by a five spans gantry, with 16 and 20 m partial spans, totalling 92 m long, built in reinforced concrete. The bridge deck slab is 12.50 m wide, to accommodate one traffic lane per way, just like the current situation. The bridge foundations are materialized through 0.80 m diameter piles reaching depths from 24 to 28 m.

On the left side of the Cambamba River, due to the existing occupation density, bridge approach is achieved through variable high reinforced concrete side walls, reaching a total length of 92 m on both sides.

Nowadays, the works are in progress, its inauguration being foreseen to the 2º trimester of 2015.

Estrada da Samba and Avenida Van-Dúnem Loy Interchange Redesign

The interchange between Estrada da Samba and Avenida Van-Dúnem Loy, at Talatona, south Luanda, is one of the main interchanges to approach the city, presenting high daily traffic, with frequent and longstanding jams.

The present geometry of the interchange forces U-turns in the lane separator, to be possible to turn left, worsening substantially traffic jams in that place and forcing to travel long additional distances. This interchange includes also an important access road to central area of Talatona, representing now and in the future, due to its proximity to the Futungo de Belas, a crucial interchange of road infrastructures in the Luanda region.

COBA Group, represented by COBA Angola and COBA Portugal, has developed a Conceptual Study to redesign the present interchange, for Tecnovia Angola. The Client is the Ministry of Construction of the Republic of Angola, through Direção Nacional de Infraestruturas Rodoviárias (DNIR).

The works for the redesign of this interchange is within the Angolan restructuring programme and was recently awarded to contractor Tecnovia Angola. COBA Group will provide engineering services for the Final Design execution and and technical follow-up of works.

Lx, 20 Fev 2015