Shintabisoko Bridge


Jump to: navigation, search

Shintabisoko Bridge
Yaotsu, Gifu, Japan
656 feet high / 200 meters high
722 foot span / 220 meter span

Opened on January 15th, 2010, the Shintabisoko Bridge became the highest bridge ever in Japan and the first in the country to exceed 200 meters in height. Built as part of a new bypass for route 418, the original road was an unmaintained series of serpentine twists and turns in a mountainous region of Gifu prefecture. The construction of the Shin-Maruyama Dam also made the new highway a necessity as parts of the old 418 were inundated under the reservoir. An arm of this new lake is located under the new bridge. With a full reservoir depth of about 50 feet (15 mtrs) where it crosses beneath the bridge, the normal height of the deck over the water is approximately 607 feet (185 mtrs). Some may feel that this still leaves the Hiroshima Airport bridge as Japan's highest with a deck to water height of approximately 640 feet (195 mtrs). But all dams have periodic drawdowns from a lack of rain as well as maintenance so from time to time the Shintabisoko bridge will be a full 200 meters high.

The bridge was constructed using the cantilever method and the 2-lane, single cell box girder has a depth of 17 feet (6 mtrs) in the center and 43 feet (13 mtrs) over the piers. The tallest pier is 331 feet (101 mtrs) and is said to be the 3rd highest in Japan.

Shintabisoko Bridge Elevation

2010年1月15日に開通した新旅足橋は、日本で初めて200メートルを超える高さを持つ橋であり、同国内で最も高い橋となりました。 国道418号の付け替え道路の一部として建設された橋で、元の道路は岐阜県の山中にあり維持管理がされず蛇のようにうねうねと曲がりくねった区間が続いていました。 新丸山ダムの建設により旧国道418号の一部が貯水池の湖底に沈むため、新道の整備が必要になりました。新しい貯水池の一部はこの新しい橋の下方に位置しています。この橋の直下で交差する貯水池が約50フィート(15メートル)の満水位に達すると、水面上の橋面の高さはおよそ607フィート(185メートル)になります。 橋面から水面までの高さがおよそ640フィート(195メートル)ある広島空港大橋がやはり日本で一番高いと思われる方もおられるでしょう。 でも、ダムは雨が降らない渇水期や維持管理が行われる時に周期的に水位が下がりますので、新旅足橋は200メートルの高さがあるということになります。


Image by Japanese Civil Engineering Construction Association.

Shintabisoko Bridge computer rendering with the reservoir visible below.

Construction sign.

Image by PC news.

Image by PC news.

Image by PC news.

Shintabisoko Bridge construction sequence.

Shintabisoko Bridge terrain location map.

Location map showing the Shin-Maruyama dam and Shintabisoko bridge in red.

Personal tools