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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 tvb now,tvbnow,bttvb2 E7 ~0 e4 C7 O

- e) X$ t6 ]- ~7 K! o7 \公仔箱論壇If you are not a Physics person, read on and learn a fact of physics.   公仔箱論壇$ a" @- |1 A( O
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! 0 I3 H& J, p4 {2 P; b. G
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
- m6 {; R6 T. r& C" V1 Y/ Y: j7 Ktvb now,tvbnow,bttvbIt is located in the city of Magdeburg, near Berlin.

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The photo was taken on the day of inauguration.5.39.217.76, C; m9 K5 Z3 v' d! _0 O/ w7 {
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.8 y* @9 f; G1 L5 U
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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,& c- n! U9 L8 `/ N2 v" P- g
Or just the weight of the water? , K. Y" [' P8 H% }
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Answer:
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It only needs to be designed to withstand the weight of  the water! 公仔箱論壇' U& [) i; N  @3 G; ^  Y: o7 `
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公仔箱論壇# e7 _4 j. Y, _9 \% r: w4 }
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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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
0 r! V. O+ P9 V  U8 W! w連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。* a# a, J; E6 S' L
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。# b" F+ c  q6 P. g4 M, F4 i7 N
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。5.39.217.76" Y, Q' v, c+ Z
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。
  z4 F: R* v9 e7 k% u  z# _/ T# B7 }tvb now,tvbnow,bttvb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
) z2 ~- E. X: U  W立方公尺混凝土,完成了巨大的水橋,連接柏林的內陸港與萊茵河沿岸港口。
5 q9 k% e# U- [5 h" L2 V8 l7 V# Jtvb now,tvbnow,bttvb2003 年正式通航,水橋全長 918 公尺。 而 2003 年之前,在米德蘭運河和
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多谢您的分享!
first time heard & saw it, thanks for sharing, thanks tvboxnow!!
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