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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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If you are not a Physics person, read on and learn a fact of physics.   + T) h5 M( @4 B' G3 }# R2 a) |$ I
AMAZING!

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Even after you see it, it is still hard to believe!
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$ s* E4 ~$ g& G) x/ |' N公仔箱論壇Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 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。$ {9 o8 q. l+ b$ d
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
7 ~* X% E' @' A6 O4 M4 T5.39.217.77:8898It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
4 X0 P5 F5 h8 q( b$ A8 x/ b5.39.217.77:8898To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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9 B/ ^. V0 R/ y0 T+ `: B+ j5.39.217.77:8898Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
( a7 q6 C# W3 f+ |+ Y6 [Or just the weight of the water?
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1 y8 i1 P1 w3 S2 ~" N* MAnswer:
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It only needs to be designed to withstand the weight of  the water!
' ]# Y0 K3 ?9 p$ i5 m8 x0 a5 \公仔箱論壇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 Germanytvb now,tvbnow,bttvb/ r  x# X5 Y* W/ v  j* \4 R6 |
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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( q) D& M, U8 p公仔箱論壇公仔箱論壇1 n8 A' ?8 U  }2 e

0 N$ P" k1 f% dtvb now,tvbnow,bttvb公仔箱論壇* B$ J% [7 S# Z  x2 p% v7 Q6 ?
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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
# ^- i5 Z6 R5 P/ s* V( G$ Y9 c) T連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇5.39.217.77:8898" h  ]) b$ l9 b" U% a# g7 ?
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
' M) _( m7 a% H# ]: y6 \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。
1 H  H6 O% z: k, x5 y; }! O* ]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。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。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。/ s1 _1 h2 x" ?% Q% z. A
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
5 |/ T, H) t2 X8 ~* d+ h1 ]! T公仔箱論壇立方公尺混凝土,完成了巨大的水橋,連接柏林的內陸港與萊茵河沿岸港口。 tvb now,tvbnow,bttvb& \- H: K  @) E  _) f5 Q
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9 C$ M4 k) x7 b3 t; D  J* l  f
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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