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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
" |& o3 K3 P+ W+ g6 aTVBNOW 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。tvb now,tvbnow,bttvb$ F/ n1 V9 s% D5 j! B3 E8 x
If you are not a Physics person, read on and learn a fact of physics.   
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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! % K3 ~' M  B" `9 s9 F
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
% e7 a" h: {3 [0 L公仔箱論壇It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
1 Y. [& ?# E" ~. sTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.& T3 n5 |" o3 i2 R$ }2 d  D9 x

; K2 [7 A4 S6 x% y" J# q  _5 \Question:

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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,7 S% K$ d7 U) }% i; W0 d
Or just the weight of the water? 公仔箱論壇7 g4 _, o! `" ~  [( t5 I
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Answer:

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/ @4 o0 W8 F6 ztvb now,tvbnow,bttvbIt only needs to be designed to withstand the weight of  the water! tvb now,tvbnow,bttvb5 f8 c; D- P9 u6 R
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
0 F* k0 `9 X  y/ k8 w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. 5.39.217.76' x: h+ [( h$ ]7 }" q# E/ R: ]& V
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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
" Z/ ^5 @7 y& @: q7 d6 j* o公仔箱論壇連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇- @+ H! _5 l6 P* R* w$ Z
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
3 a$ }, S  w: T, ~3 G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。5.39.217.763 |! [8 X) I) I. 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。+ C, _! u5 ]5 [7 P
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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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" K7 G" v! `1 D- Z4 H2 J2 M
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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