New Vai Town Bridge (King Zolu Duma Bridge) / Monrovia, Liberia


Services Provided by FINLEY

  • Design and Construction Engineering
  • Final Design, Plans, and Specifications
  • Construction Analysis and Camber Calculations
  • Segment Shop Drawings
  • Bridge Geometry and Construction Manual
  • Erection Equipment and Temporary Supports
  • Post-Tensioning Calculations
  • Technical Support

Owner

Government of Liberia, Ministry of Public Works

Client

ChongQing International Construction Company (CICO)

Renderings

Courtesy of G.A.SH., Phoenix

Cost

$14.5 million

Start date

2010

Completion date

2011

Monrovia is Liberia’s largest city and its commercial, communications, and financial center. The city’s economy revolves around its harbor. Roads and an airport connect Monrovia with Liberia’s interior.

Through the Ministry of Public Works the government of Liberia signed a $14.5 million agreement with the Chinese firm that is part of the World Bank, ChongQing International Construction Corporation (CICO), to rebuild the Vai Town Bridge after the original bridge collapsed and cut off access between Vai Town and Water Street in 2007.

The new Vai Town Bridge has an intersection designed for the smooth transition of traffic where the two bridges converge on the Vai Town side of Bushrod Island. The new bridge provides for two lanes of pedestrian traffic.

FINLEY provided bridge design and construction engineering services. In the project development phase FINLEY provided the conceptual and final design, drawings, and specifications. The bridge is 240 m in length and 13 m wide with a main span of 100  m. The foundation system utilizes drilled shafts and an innovative approach to produce fixed interior piers directly from four cased, drilled shafts. This simplified substructure construction and reduced the schedule substantially by eliminating the need for cofferdam construction.

During the bridge construction phase engineering services included segment shop drawings, construction analysis and camber calculations, erection equipment and temporary supports, post-tensioning calculations, bridge geometry and construction manual, and technical support.

FINLEY utilized structural analysis softwares RM2006 and LUSAS among others. All CADD work was completed using MicroStation and the automated rebar detailing program, Rebar. The industry standard FINLEYcip, proprietary geometry control software, was utilized for segment casting. FINLEY’s computer solutions allow for electronic linking and paperless submittals of the construction engineering documentation.

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