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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
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/ @( s5 _3 ]" n. ~* wIf you are not a Physics person, read on and learn a fact of physics.   " W2 `" m  B/ v' L8 t$ j8 N& @
AMAZING!

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. m# x+ t* Q$ u3 H# p0 K) dEven 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 T& Q& Y7 ]. z" N. _0 C% C公仔箱論壇This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
3 c4 ~% o) @1 r0 v5.39.217.76It is located in the city of Magdeburg, near Berlin.
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。$ h# M5 `# T) R+ p0 D4 n

) C$ k; k- u0 ?: lThe photo was taken on the day of inauguration.
' f5 c$ ~; B( m  x/ A/ f5.39.217.76To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
, {2 E3 T' X$ U0 Qtvb now,tvbnow,bttvb
/ p" O9 e2 X# a$ _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。Question:

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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
! ^3 l" Z  b8 j& l9 |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。Or just the weight of the water? 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。' ^& X  ?' |- J% W/ m

7 C8 }3 |7 P4 p$ G6 H5.39.217.76Answer:

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It only needs to be designed to withstand the weight of  the water!
: T* K9 p0 q  L. [% Y* Dtvb now,tvbnow,bttvbWhy? 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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' {2 a9 k4 v& E/ x0 N5 O公仔箱論壇
The Incredible Magdeburg Water Bridge in Germany
5 S! u! R: V& g9 t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. 7 a0 z* R" }: W3 C1 K. M% t
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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.

/ {4 j0 U5 `. S/ ?tvb now,tvbnow,bttvb
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2 B0 ~, t! o2 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。- |' v5 x0 n5 w0 `

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9 A  t" L+ l/ T$ q& z. ]  S! a! }: r; RTVBNOW 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。
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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
6 c- [" N6 Q4 [4 k; e( H5 p連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇, ]5 m. \  _! H, E0 O- X% d$ D2 R# s- I
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。$ Y5 X8 w4 A( a; J$ y1 u, ?$ B
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。tvb now,tvbnow,bttvb# k% y* ~/ Z% p/ ^% y% }
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。公仔箱論壇5 @  M! V9 b% B6 y$ t# _
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
" L2 B3 u2 a4 ]# q# L6 c; Z# }4 }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。 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。  Y% P' s% ]/ m( ~. R
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
- V" h1 ?! H7 e5 q+ B5 u$ ]( L5.39.217.76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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多谢您的分享!
first time heard & saw it, thanks for sharing, thanks tvboxnow!!
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