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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 2 C+ |0 Y/ q3 G* t1 [4 [2 G0 I
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If you are not a Physics person, read on and learn a fact of physics.   
1 O; ]7 x* O# V. T8 O' stvb now,tvbnow,bttvbAMAZING!
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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!
& l" n: x' R: {3 A0 {: ?; RThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 公仔箱論壇) h. o# w8 c% M$ ]
It is located in the city of Magdeburg, near Berlin.
公仔箱論壇9 _0 ?9 ?, o% `) h9 q$ y

7 {& @5 ]/ @9 a: \/ z6 z. v0 p; MThe photo was taken on the day of inauguration.公仔箱論壇5 L! C6 A3 G+ u8 o3 S4 X
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.5.39.217.76: f" n; K1 K$ B& ]9 v/ C
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Question:
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( j& z: {$ L& F% l4 YDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
- h- O! `2 |" @0 N3 M# a, 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。Or just the weight of the water?
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& \3 c5 a2 i6 k' ]; `% 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。Answer:

( \: a" K* b  ^; t公仔箱論壇; q, j- K) @& N# B8 x. F! ]# v) `/ j' w0 }
It only needs to be designed to withstand the weight of  the water!
, S) N, H+ B. e* q/ f* ^tvb 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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9 @9 m, l9 @+ y! G4 h公仔箱論壇
The Incredible Magdeburg Water Bridge in Germany5.39.217.768 }2 R- J4 a; r) q6 [, n
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.2 T! e2 _" P/ Y
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. % Y; W9 C2 F) I% {) ], U0 n$ Q
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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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0 o$ ~" z# R$ ]5 D0 m$ m& E公仔箱論壇
( [2 X2 Y1 O% M( o0 M& ^- @$ b- Q* |5 _公仔箱論壇
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( k$ s$ ^  t( u7 `9 pTVBNOW 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
& D, Y9 [' ?. R9 C1 l公仔箱論壇連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇
0 k* R- ]: r  W+ 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。也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
+ t3 ?$ d$ U( n& j, Z% z0 O" I4 WTVBNOW 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。
/ j- `. O- o, x7 a% X& \9 p% @5.39.217.76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。tvb now,tvbnow,bttvb' U% u, `. [' x) s' Q/ v# n. 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
# b3 p8 `- q1 o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。! U- I5 T7 @0 E5 v( n3 @, @
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$ [" T! i. l' {' ^  t; {! p* 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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