Hiroshima Airport Bridge

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Hiroshima Airport Bridge
広島空港大橋
Nuta River Bridge
Hiroshima, Japan
640 feet high / 195 meters high
1,247 foot span / 380 meter span
2010

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Image by Japanese Bridge Association.


Upon its opening in 2010, the Hiroshima Airport bridge became the highest bridge ever built in Japan, surpassing the Kokonoe "Yume" Otsurihashi footbridge built just three years earlier in Oita prefecture. The arch is part of a new 19 mile (30 km) Central Flight highway that will connect the new 1993-built Hiroshima airport to highway 184 - a major route in the region. Also completed in 2010, the Shintabisoko Bridge became Japan's highest bridge at 210 meters.

Bookended by two mountain tunnels, the massive 1,247 foot (380 meter) long arch spans 640 feet (195 meters) above the Nuta River. The main arch was constructed using the stayed cantilever method whereby a tower is erected on either side of the gorge and cables temporarily radiate out from it to support individual sections of the arch until the two halves can be joined in the middle. A cable highline between the tops of the two towers was used to move the steel sections into place high above the river. It is the longest arch of any kind ever built in Japan. Corrosion resistant steel was used to avoid the difficulty of repainting the bridge in the future.


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Hiroshima Airport Bridge Elevation


2010年の完成によって、広島空港大橋は三年先に大分県に建てられた九重“夢”人道大吊橋をしのぐ日本で最も高い橋となりました。このアーチ橋は30キロに及ぶ新しい広島中央フライトロードの一部で、1993年に建設された新しい広島空港とこの地域で主要である国道184号線につながります。

二つの山あいのトンネルに挟まれた長さ380mのアーチは、沼田川より195m上にかかっています。主要なアーチはステイドキャンティレバーと呼ばれる方法によって建設されました。これによると、タワーが一方の峡谷に建てられ、これより一時的に放射上に伸びたケーブル(大綱)が各部分のアーチを支えます。そして二つに分かれているアーチが中央で結合されるまでアーチを支えます。二つのタワー上の間にかけられた高架ケーブルは沼田川上空において、鋼鉄部分を移動設置するために使われました。これは日本で最長のアーチ橋となります。また、将来錆びついた橋に再塗装を行わなくてもすむように腐食予防鋼鉄が使われています。


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Image by Saka Geen.


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Image by 久村千景.


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The massive scale of the arch can be seen from the small-looking maintenance stairs.


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Image by Japanese Bridge Association.


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Image by Japanese Bridge Association.


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Construction plan showing the highline towers 1,640 feet (500 meters) apart. Image by Japanese Bridge Association.


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Temporary cable stay construction plan. Image by Japanese Bridge Association.


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Image by Japanese Bridge Association.


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Hiroshima Airport Bridge satellite image.


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Hiroshima Airport Bridge location map.