Ōta River Bridge

The Ōta River Bridge (Japanese: 太田川大橋, also rendered in rōmaji as Otagawaohashi, also called Otagawa Bridge or Otagawa Ohashi Bridge) is a bridge on the Ōta River in Hiroshima, Japan. It is the southernmost of all the crossings of the Ōta River and carries Route 3 (the Hiroshima Minami Route) of the Hiroshima Expressway.

Ōta River Bridge
Coordinates34°22′30″N 132°25′05″E
CarriesHiroshima Expressway Route 3
CrossesŌta River
LocaleHiroshima, Japan
Characteristics
DesignComposite box girder/arch bridge
Total length412 m (1,352 ft)[1]
Width12.5–16.2 m (41–53 ft)[1]
Longest span116 m (381 ft) (×2) [1][2]
Clearance belowLess than 12 metres (39 ft) at mid-span[lower-alpha 1]
History
OpenedMarch 2014 (2014-03)
Location

Construction

A decision to build a bridge as part of the expressway system was made in 2004.[3]:3 A design competition committee was formed in late 2008 and received entries from 18 Japanese and three international firms. The winning design by Kenichi Nishiyama of Eight-Japan Engineering Consultants collaborating with Yoko Kabaki, Akiyoshi Nii, and Hitoshi Okamura, was selected in July, 2009.[4][5]

The bridge was built by Shimizu Corporation and finished in 2014.[6] The bridge design had to comply with height restriction laws due to its proximity to Hiroshima–Nishi Airport.[2]

The bridge, a composite prestressed concrete continuous rigid frame box girder with steel arch bridge stiffener,[2] won the Japan Society of Civil Engineers Tanaka Award.[7]

Notes
  1. Based on height to pilings under riverbed[2]:fig. 4

References
  1. 広島南道路　太田川大橋 [Hiroshima Minami Route–Ota River Bridge] (in Japanese), Shimizu Corporation, retrieved 2015-12-27
  2. Nishiyama, Koichi; Fujimoto, Minoru (2010), 広島南道路太田川放水路橋りょうの計画と設計 [Planning and design of Hiroshima South Road Ota River spillway bridges] (PDF) (in Japanese), Chugoku-Shikoku regional development Bureau (国交省中国地方整備局), retrieved 2014-12-08
  3. Hiroshima City Planning Council (2007), 第２１０回広島県都市計画審議会 (PDF) (in Japanese), Hiroshima Prefecture
  4. 広島南道路太田川放水路橋りょうデザイン提案競技選考結果報告書 [Hiroshima south road Ota River Floodway bridges design proposal competition selection result report], City of Hiroshima, July 14, 2009, retrieved 2015-12-28
  5. Proceedings of the 13th symposium on steel structures and bridges (PDF), Japan Society of Civil Engineers, October 2010, retrieved 2015-12-28
  6. Transportation and telecommunications projects, Shimizu Corporation, retrieved 2015-12-27
  7. Award winners–new construction (in Japanese), Japan Society of Civil Engineers, March 26, 2014, retrieved 2015-12-27
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