Created with Sketch.

The Bua Bridge project is part of the contract “Upgrading of Old Airport – Kwanyanda–Santhe and the Kwanyanda–Kasiya Spur (S117/1342) Road Project”.

The project for the transposition of the Bua River is an alternative solution to the original design requested by the contractor in order to adapt to the materials and construction techniques available on-site.

Structural solution

The bridge is built-up with 4 simply supported spans, defining a total length of 82.55 m between abutment axes. The deck, with a total width of 10.85 m, consists of 7 precast and prestressed I-beams and a complementary slab over pre-slabs. The abutments are type closed and based on pile caps. The column alignments are made up of 2 units Ø200 cm on a single pile cap. The columns’ cap beam was designed to be precast, which allowed a faster construction sequence for the structure.

According to client’s demand, GEG also developed the reinforcement plans, with BIM modelling methodologies which allowed the creation of the three-dimensional and parameterized modelling of all the geometry and reinforcement details for the entire structure.

Key Facts
Created with Sketch. Year: 
Created with Sketch. Client: 
Mota-Engil Africa
Created with Sketch. Services: 
Lilongwe, Malawi
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