NEXCO CENTRAL (Central Nippon Expressway Company Limited)


Study panel for investigation of debonding / falling event of bottom surface sprayed concrete of steel main girder bridge

Isewangan Expwy Kamigo Taisei Viaduct, the thickened concrete sprayed on the underside of the bridge floor slab due to environmental measures peeled off and fell into the Expressway land.
In consideration of this fall event, a study was conducted to examine from a technical and professional point of view the response policy for bridges with a structure in which precast PC bottom slabs of steel minor girder bridges were constructed with lower surface shotcrete after construction. A committee has been set up.

Committee list (titles omitted)

Chairman
Naoji Ikeda
Professor Emeritus, Yokohama National University
Committee
Kentaro Yamada
Professor Emeritus, Nagoya University
Committee
Nasu
Professor, Kochi University of Technology
Committee
Kazuo Soseki
Professor, Social Infrastructure Engineering, Graduate School of Engineering, Nagoya University
Committee
Hikaru Nakamura
Professor, Social Infrastructure Engineering, Graduate School of Engineering, Nagoya University
Committee
Takashi Tamakoshi
Ministry of Land, Infrastructure, Transport and Tourism Director, Bridge Laboratory, Road Structure Research Department, National Institute of Land and Infrastructure Management
Committee
Hiroshi Watanabe
Senior Researcher, Fundamental Materials Team, National Institute of Public Works
Committee
Koichiro Murasakimo
(stock)Expressway Director of Bridge Research, Road Research Department, National Institute of Advanced Industrial Science and Technology

Contents of proceedings

First Committee

Second Committee

3rd Committee

final presentation

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