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EVER SEEN A RIVER OVER A RIVER?

本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 5.39.217.766 a9 H$ g3 }" F( E4 u$ |7 H& r
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If you are not a Physics person, read on and learn a fact of physics.   + G" J+ I" A3 y$ R* w' l& S
AMAZING!

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Even after you see it, it is still hard to believe!
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Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇% L% f3 E/ i4 |; o, E) m  G
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. tvb now,tvbnow,bttvb8 b$ G1 W! y. p4 ~, O( ^  w- Q% a) F
It is located in the city of Magdeburg, near Berlin.

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/ j: W2 s1 r9 L- `, X/ y" W/ itvb now,tvbnow,bttvbThe photo was taken on the day of inauguration.
. ~, ~. C6 h6 U0 pTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:

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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
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Answer:
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公仔箱論壇9 H, h3 {6 G3 n1 Y6 N
It only needs to be designed to withstand the weight of  the water! tvb now,tvbnow,bttvb  s% T* m) K' L
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded

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The Incredible Magdeburg Water Bridge in Germany
% M4 u" T- \& J' D! x! s( N公仔箱論壇The Magdeburg Water Bridge is a navigable aqueduct in Germany that connects the Elbe-Havel Canal to the Mittelland Canal and allows ships to cross over the Elbe River. At 918 meters, it is the longest navigable aqueduct in the world.
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The Elbe-Havel and Mittelland canals had previously met near Magdeburg but on opposite sides of the Elbe Ships moving between the two had to make a 12-kilometer detour, descending from the Mittelland Canal through the Rothensee boat lift into the Elbe, then sailing downstream on the river, before entering the Elbe-Havel Canal through Niegripp lock. Low water levels in the Elbe often prevented fully laden canal barges from making this crossing, requiring time-consuming off-loading of cargo.
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# l8 |8 ^; m2 M; h3 B0 m公仔箱論壇Construction of the water link was started as early as in the 1930s but due to the World War 2 and subsequent division of Germany the work remained suspended till 1997. The aqueduct was finally completed and opened to the public in 2003.

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平壤核子能源研究所
這宏偉壯觀、傲視寰宇的工程傑作早在 1919 年工程師們即已提出
. z0 {" J; h0 l2 B1 htvb now,tvbnow,bttvb連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇tvb now,tvbnow,bttvb' S# X6 x3 h: _, Q( Z  V1 z
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
5 C% O3 n0 \3 E隨後的冷戰時期,德國分裂,該專案被東德政府無限期地擱置下來。
7 @9 a* q3 [. E" B) F; y" ]; ^5.39.217.76德國重新統一後,隨著道路交通重大工程規劃的編制,水橋再次成為一個優先專案。
/ d3 b) J, Q6 G6 O) P' E於1997年開始建造,經過 6 年,耗資 5 億歐元,2.4 萬噸鋼材和 6.8 萬
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0 ?5 `0 t$ x: X$ {2003 年正式通航,水橋全長 918 公尺。 而 2003 年之前,在米德蘭運河和tvb now,tvbnow,bttvb& E- s& _8 w" B+ h
易北河-哈威爾運河之間運行的船舶不得不繞道 12 公里通過。
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  • k23bb

多谢您的分享!
first time heard & saw it, thanks for sharing, thanks tvboxnow!!
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