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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 ; s9 u8 i+ F9 x. ~
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If you are not a Physics person, read on and learn a fact of physics.   
! c6 i. G+ C9 b0 SAMAZING!
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% ~; _0 X9 Y; ~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。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!
+ p+ d. Q2 z  o' r4 _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。This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
& n" v! o  C* U0 WIt is located in the city of Magdeburg, near Berlin.

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The photo was taken on the day of inauguration.
4 p" Z4 h! L! Q& L) 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。To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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8 z1 o8 K5 d; [tvb now,tvbnow,bttvbQuestion:

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" O! |0 W$ D3 v. {) Itvb now,tvbnow,bttvbDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
& b1 s. F) Y! ?  p( S+ ^Or 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。! a$ h9 ~3 o+ W* ]
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Answer:

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It only needs to be designed to withstand the weight of  the water! ( Z- _+ i/ m2 J6 |4 B
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 Germany公仔箱論壇! c6 H( S/ h3 {! d( Z
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." h- Q' w# b* @9 x% }+ i; o8 t
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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! U- S# m6 l5 T- o' U5.39.217.76TVBNOW 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。( J4 d6 i4 q: p6 T) C
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5.39.217.76: l# x! Q8 e: }4 x' K. p! p3 E' g
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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
7 D( U+ @' ?' ^& J: R* N9 Z$ A$ ]tvb now,tvbnow,bttvb連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇
& H5 [0 t: C, R" [% S- j2 zTVBNOW 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。tvb now,tvbnow,bttvb, ~3 o" f. Q' s9 m5 ^% z" ^) T
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。
4 s6 z# j9 s0 _7 k- w( D3 V5 otvb 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。5.39.217.76% P. _  v8 k' w# }* O- S2 f
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
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2 ^( h# e( b" M1 f0 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。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5.39.217.762 J: m0 P$ {2 U* h3 T, w
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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