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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 , [4 U1 O1 u5 ~: m( u
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If you are not a Physics person, read on and learn a fact of physics.   公仔箱論壇( e9 H) Z. v; u; L
AMAZING!
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Even after you see it, it is still hard to believe!
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! K8 g! ?% @6 ]1 T& M6 `! \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。公仔箱論壇4 I/ @1 ~) Q& V3 {4 R4 O
Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
$ w1 p( I" E0 H1 k2 `, {This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
+ U+ m. H: @7 S) `; `5 R. ?5.39.217.76It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.公仔箱論壇1 D8 K5 L  m4 l- @% e6 ]
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.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。7 v" D& r1 m) v' L" J0 \+ v" P
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Question:
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- s' z1 u1 G% @* b6 A! s# cDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
1 q( Q% h& n( d# K" q1 ~公仔箱論壇Or just the weight of the water? 5.39.217.76: _* h6 R( ~( |/ O* d

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It only needs to be designed to withstand the weight of  the water! " y" J; x" `; x. Q! t# d$ j4 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 Germany5.39.217.76/ W$ g9 P/ b  f3 d; f8 K; g7 d
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. 公仔箱論壇5 S) N& n+ H. b& 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
. U2 t+ V' K+ N1 [4 z6 l$ r5 [4 X& A5.39.217.76連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇
; d, r4 x) ~8 j$ N3 l* ~2 J5 W也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
* B0 A4 K9 Y* z) l7 rtvb now,tvbnow,bttvb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。公仔箱論壇1 c, ?) R& ~& B8 T
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。
' A8 J+ Z: V$ Y! R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 萬6 s+ y3 w4 _1 f0 [2 _$ F
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。 公仔箱論壇. `& F+ z6 M' Z: l
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
, ]8 Q' O+ ^4 Q- C  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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