State of the Art: Design Construction and Rehabilitation of Steel Highway Bridges of DOH in Thailand

by Sukit Yindeesuk, Nuttapon Suttitam

Publisher - Bureau of Bridge Construction-Department of Highways, Iron and Steel Institute of Thailand

Category - Engineering & IT

Department of Highways (DOH) in Thailand is responsible for design, construction, and maintenance of highway and bridge. The highway bridges in Thailand have been focused on prestressed concrete types due to the cost of construction and maintenance. In the recent years, the rapid development of cities and infrastructure requires the designers to consider steel bridges to minimize the effect of construction on the traffic conditions. In city area, the new constructions of horizontal curve steel I-girder or box girder bridges are often considered for the overpass or directional ramp highway bridge crossing state highway with huge traffic volume to reduce the time of road closure during fabrication or installation of the bridge. For land mark bridge, the composition of concrete and steel bridge structure is more popular and recommended for beautification; for example, the network tied arch bridge crossing Chao Phraya River in Sing Buri. Regarding to the maintenance of existing steel bridges, DOH is involving the rehabilitation and strengthening of historical truss bridge with 65 meter long span. The challenge is to maintain the traffic volume during the member and bearing replacement. The important aspects and details of each selected projects will be presented in the paper.

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