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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 5.39.217.762 _( K' J' H: ^' v/ n
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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!
2 H) Z9 F, N/ M. C0 k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. 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。; M  b, N% r, }; m% G2 Q
It is located in the city of Magdeburg, near Berlin.

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: K6 s3 f. v) e. ?. l. q, C5.39.217.76The photo was taken on the day of inauguration.公仔箱論壇! H' v, U) J% ^
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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( m1 W* L, }+ z; S3 u2 O5 {5.39.217.76Question:

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0 C. o) N/ ]. Z' g3 n& f公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
* A' |5 G) i% q; c: u$ cOr 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。  Y1 ~7 N) v" E- M

; ?( ]* d2 [. J- B. Vtvb now,tvbnow,bttvbAnswer:

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It only needs to be designed to withstand the weight of  the water!
% r* V) \0 m4 }9 X2 A9 ZWhy? 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 GermanyTVBNOW 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: f5 z& Z8 ]: j0 `
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.8 _1 q, P- ]- p  C# W% Q4 h8 {! W2 G
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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! x8 \5 B- f; u; i8 `2 T6 T3 O5.39.217.76Construction 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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3 I/ a9 [" _, o) h5 r, `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。
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公仔箱論壇3 R0 _2 y% a! S  [; r, W/ }
tvb now,tvbnow,bttvb( C" M1 r/ _; o  w( A& F9 j

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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
% V/ w$ v: P) k+ E" c: ?7 J* t連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇公仔箱論壇5 D7 s. v5 o$ V- j. x
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
* r, ~5 [9 u! X9 kTVBNOW 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。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。
  f8 R. h/ V! x% }5 X. O7 O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。/ Q5 m  i( T9 n# z& D4 U/ a# e8 g
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
' m% g! q. Y$ t' f# g4 H0 G* J) S  o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。 5.39.217.76- J5 C" `9 x" n; M
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
3 u& W/ o2 _  e6 w2 M& Z; V4 u0 }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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