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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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, o/ a2 l  M+ J4 etvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics.   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。( f' |! x5 V4 }) q% D- ~
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! tvb now,tvbnow,bttvb  H; \0 q2 k1 z& E2 t8 ^, F0 ^+ c  b8 C
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. # s2 ]9 ?! m6 @
It is located in the city of Magdeburg, near Berlin.
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, _3 W% f2 o8 H0 x/ m& _公仔箱論壇The photo was taken on the day of inauguration.
8 a  n- H6 r- K& J0 ^公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.7 }: h& @7 M- t* S: Q; M' {% d
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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,tvb now,tvbnow,bttvb$ T4 l2 f2 _, ?, K0 Y
Or just the weight of the water?
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Answer:

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It only needs to be designed to withstand the weight of  the water!
; F6 \* N8 A  N  rWhy? 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
- R, {8 _: s# g$ W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.* N' ]0 `7 y5 Z6 o
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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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。* |3 O! K& F! _

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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
! r& }0 D$ U. C9 g+ m- [公仔箱論壇連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇5.39.217.76; b0 A. L6 N1 Z2 w+ Y, J! ]
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。  W, j; Q! u3 g2 V' d1 S9 B
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。
/ i. V9 H) Z' r  M/ ^, A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。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。6 }# l1 G( z) l/ \- b; K) ^/ Y
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
  I1 C% U; m1 i3 u2 w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。 9 f% y. |7 d+ m
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! d  P6 `" }; W$ w, q
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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  • k23bb

多谢您的分享!
first time heard & saw it, thanks for sharing, thanks tvboxnow!!
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