Details
- Contract Period 14 Mar 2015
- Location Masalani, Kenya
- Contract completion 2002 - 2006
- Value $6 million
- Client Ministry of Roads and Public Works
- Physical completion 100% completed
- Category Bridges
Description
This is a 136m long self anchored steel suspension bridge built across river Tana. The foundation is in concrete bored piles 600mm diameter 25m below pile cap. The support structures of abutments and pier are in reinforced concrete.
HIGHLIGHTS
The foundations were originally in steel H sections but we offered an alternative and designed for 600mm concrete bored piles.
The construction mode for the bridge required that the deck be erected first before installation of cable and transfer of loading from temporary supports to cable system An elaborate temporary support was designed, fabricated and installed by piling into the river to provide for this support. The system included a jacking frame for camber provision and load transfer
The steel for the deck beams and towers were to be sourced partly from an old bridge and partly new parts. The old parts were unserviceable and a complete use of new parts was required. There being no design for the bridge we undertook to do the design, prepare fabrication drawing and fabricated the steel components.
The construction design and the erection of the bridge deck, cables and hanger bars was done entirely by local staff and resources.
All temporary work were locally fabricated and installed on the site by the main contractor.
The stiffener girders, bracings and towers are in steel and the main cables comprise of 7 no. 45mm diameter fully locked coil ropes.
The deck is in steel troughing 9mm thick with 300mm concrete topping.
Fabrication drawings for the Bridge steel was done by associated and fabrication done in Dubai. Cables design were done by Associated and manufactured in UK and Germany. Erection done by Associated Construction Co. Ltd using local resources.
