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Akashi Kaikyo Bridge
Transcript of Akashi Kaikyo Bridge
Materials used to make this beautiful bridge were 181000 tons of steel and 1.4 meters of concrete.Other things that were made to make this beautiful bridge were cables,pylons and deck truss.
The Akashi Kaikyo bridge is 4 miles long.The bridge is 50 meters above water. The total length of the bridge is 3911 meters.The height of this bridge is 282.8 meters long.
Thank You for listening to our presentation about the Akashi Kaikyo Bridge. We hope you learned something new!!!
About this bridge
Akashi Kaikyo Bridge
By:Kajeenthy & Mahilini
The Akashi Kaikyo Bridge is located in Japan between Kobe and Awaji island.It was opened in 1998.The Akashi Kaikyo is the longest bridge in the world.
Akashi Kaikyō Bridge, also called “Pearl Bridge”.
The Akashi Kaikyo bridge is the longest, tallest and most expensive bridge ever.
The bridge is so long it would take up 8 sears towers laid end to end to span the same distance
You can tour the bridge for 300 yens a person(In Us dollars that would be $2.51)
It took 2 million workers to help build the bridge
This is a deck truss
These are pylons.
Why was it built?
The Bridge was constructed as one of Honshu-Shikoku Bridge project, which is one of the greatest projects in Japan to connect Honshu with Shikoku by both highway and railway. The construction work was started in May, 1988 and completed in April, 1998 after 10 years’ construction period.
The surrounding around Akashi Kaikyo is a well-known fishery area About 1400 ships daily pass the navigation.
What was it designed to do ?
The Bridge was designed to resist both strong wind, 80m per a second, and great earthquakes such as an inter-plate type earthquake which predicts to occur around Pacific Ocean and an earthquake directly above its epicenter like the Southern Hyogo Prefecture Earthquake in 1995.
In addition, huge foundations had to be constructed in the deep sea of 60m and under the fast tidal current of 4.5m per a second. The structure also has to support the vertical force of 120,000t.
What were the struggles building this?
One of the struggles building this bridge was that an earthquake had occurred while building this bridge.
The earthquake of Magnitude 7.2 had occurred on January 17, 1995.
There were a lot of damages during the Earthquake around Kobe and Awaji Island.
At that time, Akashi-Kaikyo Bridge was under construction, in other words, both the towers were completed and main cables of the Bridge were being built.
After the Earthquake, comprehensive investigation was done. As a result of the survey, it was observed that the span lengths were changed by the Earthquake.
However, it was confirmed that the foundations of the Bridge were moved with the bearing ground without sliding between the foundations and the ground.
After several analyses considering such conditions, it was clear that the influence of the moving was minimal and the construction work was able to continue as it is.
The girder length had to be revised because the length between the towers was changed.
This was solved by changing the girder length which was not fabricated.
Although the severest earthquake hit the Bridge, Akashi-Kaikyo Bridge was completed after 10-year construction period.
Before the construction of the bridge, boats and ships (ferries) were used to carry passengers and vehicles across the Akashi strait (straitis the english word for Kaikyo).
The Akashi strait is an international waterway approximately 1500 meters wide and serves as a shipping lane.
The Akashi strait waterway was a dangerous waterway prior to the construction of the Akashi Kaikyō Bridge.
In 1955, a earthquake came upon the area, in which two ferries sunk, resulting in the death of 168 people. As a result, the Japanese government developed a suspension bridge to cross the strait.
Originally, the plan was to construct a railway along with a road bridge.
But the construction was restricted to a road bridge consisting of 6 lanes.