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標題: EVER SEEN A RIVER OVER A RIVER? [打印本頁]

作者: lilitan008    時間: 2011-10-2 10:09 PM     標題: 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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! a' N* O, `  ltvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics.   公仔箱論壇: I& T! }) T8 n' C: {* @
AMAZING!

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Even after you see it, it is still hard to believe!
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[attach]1486499[/attach]- E9 c4 G& F4 y6 Y1 b
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。4 p4 j- X0 e6 k$ ]
Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
$ A( ?# o; Z! r  F1 c5.39.217.77:8898This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
4 f& p3 k! V( {- ptvb now,tvbnow,bttvbIt is located in the city of Magdeburg, near Berlin.

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The photo was taken on the day of inauguration.
/ b. x8 M% n, u% y  c' E$ sTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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5 {5 e. [& x9 c, k4 \( y1 m$ C& KQuestion:

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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
0 S( g: E' h0 v% }( b$ B公仔箱論壇Or just the weight of the water? tvb now,tvbnow,bttvb6 _* k2 E$ Q8 K9 ]

; y+ Y" n' {' z# n公仔箱論壇Answer:

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It only needs to be designed to withstand the weight of  the water!
( E/ R& a3 J  oWhy? 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* z% P1 u0 G9 k1 a
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.
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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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[attach]1486500[/attach]
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" q: a) ]( y& J0 j3 W1 l' k[attach]1486502[/attach]
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[attach]1486504[/attach]
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作者: busyfun    時間: 2011-10-4 11:33 AM

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 u, ~! P+ O& |; M5 N連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇5.39.217.77:8898- T5 L$ v8 y+ Y7 A$ F0 Q
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。5.39.217.77:88981 x2 }& i. r7 v" F' }
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 [# |/ O3 s+ }2 u" r, w* X3 N5.39.217.77:8898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。
/ L  g! T7 i6 x公仔箱論壇於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tvb now,tvbnow,bttvb# S5 m4 S3 G+ L
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。 2 n  Q! i3 C/ 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
1 \  D* x' S5 L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。
作者: swyip21    時間: 2011-10-7 10:19 AM

多谢您的分享!
作者: Mimisan    時間: 2011-10-12 11:01 AM

first time heard & saw it, thanks for sharing, thanks tvboxnow!!
作者: pepperjellabies    時間: 2011-10-15 09:35 PM

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