H-3, North Halawa Viaduct
Oahu, Hawaii
Client:
Hawaii Department of Transportation
Date:
Design completed 1991
Construction completed 1996
Scope of work:
Design
Construction cost:
US$ 100,000,000
Services Performed:
- Stage-by-stage erection analysis
- Development of erection camber
- Construction engineering support
Issues:
- Complex construction engineering
- Strict geometry control during erection
The North Halawa Viaduct connects the central North Halawa Valley at-grade roadway to the Trans-Koolau Tunnels. Spanning over rugged, environmentally sensitive terrain, the structure consists of two separate, curved viaducts with the outbound measuring approximately 5,400 feet and the inbound approximately 6,230 feet in length. Pier heights vary from location to location to conform to topography, with the tallest not exceeding 100 feet. This project calls for an aesthetically pleasing design that is also easy to construct within a strict construction budget. T.Y. Lin International (TYLI) was structural engineer for this project.
- Kwong Cheng, current OPAC Principal, served as Project Manager and Lead Engineer while at TYLI and directed a team of TYLI engineers to prepare the Major Structure Report and preliminary design.
- Mark Ketchum, current OPAC Principal, served as Supervising Engineer while at TYLI and provided guidance for the design and analysis during the final design phase.
