No. 142 Plant

Development of the Design and Construction for Rationalized Steel Two-girder Bridges Adopting Pre-stressed Concrete Slabs -The Design and Construction of the Sugata River Bridge and the Fukagawatani First and Second Bridges-

Akihisa Yamamoto
Tatsuya Ishige
Yuji Morikawa
Osamu Kawabata
Hideyuki Yoshino
Toshiya Itou
Kenji Matsumoto
Keizo Nishikawa

To facilitate road construction in the next century, it is a necessity that a rationalization of the fabrication, erection and maintenance of bridges be realized, and a cost minimum for structures established.
As a result of our study, it was determined that reduced steel girder bridges that adopt both rationalized structures and pre-stressed concrete slabs can satisfy these requirements.
In this paper, we give outlines of the design and construction details for the Sugata River Bridge, the Fukagawatani First and Second Bridges, built after the Nawa Viaduct East and the Chidori-no-Sawa River Bridge. All five projects used reduced main girders, and the functional and economical aspects of the moving form-works employed are especially significant.
It is concluded that these techniques show the future direction of pre-stressed concrete slab construction.

—Generally Reports— K.T.R. No.142

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