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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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  _+ H$ W$ s- U7 [4 i5.39.217.77:8898If you are not a Physics person, read on and learn a fact of physics.   
! r: k" D3 q& p$ W公仔箱論壇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! # F/ L) C; @3 }
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
$ W1 G+ A- @) F1 J8 w& @tvb now,tvbnow,bttvbIt is located in the city of Magdeburg, near Berlin.

! @* _( F: f3 `  |$ sTVBNOW 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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: \, Q+ F; c# f6 ]9 L7 a公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇+ \5 T. d8 T9 m, v) d; T
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Question:

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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,- T  a4 r6 E7 R$ e
Or just the weight of the water? 5.39.217.77:88988 V# V3 ?* T/ d* Q
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Answer:

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It only needs to be designed to withstand the weight of  the water!
; D. H4 s3 g2 L& O5.39.217.77:8898Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded
公仔箱論壇5 i, G5 X5 F9 H6 h

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The Incredible Magdeburg Water Bridge in Germany
! D9 @& {0 r  a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. 5.39.217.77:8898/ t- t* }9 V1 ]! d
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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7 @0 ^- V9 H4 L# Q) 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% r! N+ K  l( |1 I0 T
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
$ l% b' j7 G7 o$ ^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。
% b0 o2 S0 @- Y5 |- E# I2 V3 r* \1 A5.39.217.77:8898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。
6 M' q$ L! a, e+ y. c6 V4 D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
, z' o+ y0 k% u: Ftvb 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。 5.39.217.77:8898& E7 }7 B$ u" [4 B3 S
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5.39.217.77:8898) r5 x$ T. v. y4 W0 j2 y: }
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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