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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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* W) N; [! d! l0 n, f! VIf you are not a Physics person, read on and learn a fact of physics.   2 X6 I2 X$ i5 Q+ F
AMAZING!

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9 f$ A3 x8 S- ?7 t3 K7 UTVBNOW 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。Even after you see it, it is still hard to believe!
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公仔箱論壇% M3 L6 F# Z# v" I/ D. r
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Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
7 W& g" J' f9 Z- Q* O! i, ptvb now,tvbnow,bttvbThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
. N, s2 i: M$ E1 [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.
+ r/ o' b4 X+ \3 G# q- W9 R公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.tvb now,tvbnow,bttvb4 O8 x) y7 E; L5 G3 ~2 L

3 N) b  p% k. |1 d" U1 @Question:
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4 _) t+ @4 Z4 A: P! M5.39.217.76Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,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。8 d/ K# F2 f8 P, s, i
Or just the weight of the water? tvb now,tvbnow,bttvb* G6 }. w( w$ N+ 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。( X) ]2 l4 R5 N+ k9 \7 |
Answer:

  t8 f) a5 Z" [3 V" ?) H! L5.39.217.76tvb now,tvbnow,bttvb  h& E1 z. d0 i' J+ q
It only needs to be designed to withstand the weight of  the water!
& [8 }! s, A! z/ UWhy? 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
9 R& T+ ~2 R* j; P( T% u, w& n) 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. 5.39.217.768 p, x8 c6 j7 z5 j
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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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4 ^* a# h2 @8 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。
- n" S3 p; \7 M3 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。
3 S! p8 d) j* |9 `公仔箱論壇
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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公仔箱論壇( H( h: b) Z6 C% W- Z. b4 ~
連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇
$ f$ C  l6 v' n3 utvb now,tvbnow,bttvb也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。5.39.217.76# ]% z7 u& W. X+ e
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。
) ^7 D' R3 I5 f) h$ r4 Q  G; T6 ltvb now,tvbnow,bttvb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。
# k1 @3 E1 k! o% o, c7 x& b' _公仔箱論壇於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
7 e7 S$ m: Z* T) f, [1 L  ?tvb now,tvbnow,bttvb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。
6 e- J$ d  Q4 t# O1 i2003 年正式通航,水橋全長 918 公尺。 而 2003 年之前,在米德蘭運河和
  h9 l; n0 Z* r, x2 o5.39.217.76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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