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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.   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。! V* @7 z- L! F7 v- S
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!
  S5 b( X% F0 Q& |- e# ^5.39.217.76This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
; ?  R  H( E+ B  A, ktvb now,tvbnow,bttvbIt is located in the city of Magdeburg, near Berlin.
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: e0 _6 p! A5 \# t2 E3 vTVBNOW 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。The photo was taken on the day of inauguration.
" F, U* w- F! x7 ]5 L5.39.217.76To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
9 ?$ m2 R  m  |0 tTVBNOW 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。# S4 ?6 k) b2 b
Question:

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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
8 w' k& u8 Y6 B  Z1 f公仔箱論壇Or just the weight of the water?
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. [/ }0 |0 h; j* y! m公仔箱論壇Answer:

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It only needs to be designed to withstand the weight of  the water! tvb now,tvbnow,bttvb1 O2 L) R4 q+ p1 K' n
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

" m4 @! l% x" C  \/ dTVBNOW 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。& c9 Z1 J) s% ^2 O

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The Incredible Magdeburg Water Bridge in Germany
' K5 t, S! y9 Q" b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.tvb now,tvbnow,bttvb5 h7 X- J6 [6 Y5 r. ]( o& x
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
( v' h* a1 J. J8 f' K: v1 X$ \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% P8 J: p% U5 c  o( C9 [
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
) s0 H& e7 r3 x8 f7 n% t& j3 x公仔箱論壇隨後的冷戰時期,德國分裂,該專案被東德政府無限期地擱置下來。
% |: f0 g+ o% ]5 l! p公仔箱論壇德國重新統一後,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。
2 O, g9 a( I& i" l/ Z1 {) k- m4 ?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 D5 L5 t6 e, a7 V/ D2 W5.39.217.76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。
# q8 j" G* ?+ A4 ~2 r! M4 X* o- e7 E5.39.217.762003 年正式通航,水橋全長 918 公尺。 而 2003 年之前,在米德蘭運河和
1 L& y3 {/ u! P8 D$ _$ p公仔箱論壇易北河-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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