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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 - ?; e( ]* i$ l- j  y# |! j

0 K  A7 j3 w* H( @9 X: `tvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics.   
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; D8 q/ i# ]8 V0 O" q$ {  C0 ]' ]/ 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。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! $ m$ ?; b  l7 \* p5 @& z1 Z
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. tvb now,tvbnow,bttvb& z* O/ E: n! S8 W+ m) j* d
It is located in the city of Magdeburg, near Berlin.

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; e* ?% }5 A. r公仔箱論壇The photo was taken on the day of inauguration.8 f4 x7 u$ \9 [3 A2 m
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.* \8 n1 L$ `1 ?: w. C* o

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8 C+ o: g) \2 s4 v2 X# z4 k公仔箱論壇Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,6 L+ ?; j5 A! f' ^9 x. d
Or just the weight of the water? 公仔箱論壇' W, ^! j- @( P3 k
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Answer:
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/ @4 G4 _$ W& G0 F& f0 U. E5.39.217.76It only needs to be designed to withstand the weight of  the water! 5.39.217.76! m3 i! O  I) R# o
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
: J4 N. s: @; W/ p/ G  htvb now,tvbnow,bttvbThe 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. 5.39.217.76, o( m! u* Y3 T  E8 W
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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
! V5 Y2 `5 Q8 u; X, [/ f/ 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。連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇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。0 }! b1 V; X: n$ ]9 P
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。5.39.217.762 G  `% j) L# c  F/ m7 n7 {
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。
" U/ n1 H  j; j5 U. x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。+ Z9 P( B1 L0 l4 {6 \! e2 u
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+ |* o* u' p1 U4 \9 p+ m* c
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。
% @( M4 g& d; f9 w. ?" U) p5.39.217.762003 年正式通航,水橋全長 918 公尺。 而 2003 年之前,在米德蘭運河和
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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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