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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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7 O1 I/ G8 \7 V' aIf you are not a Physics person, read on and learn a fact of physics.   
% M: \0 ]& t+ d( G8 \, U公仔箱論壇AMAZING!

8 N9 c4 |$ ~+ P, {) u0 H1 UTVBNOW 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。
* @2 w( _) z/ r5 p' M! j* I0 K8 A  MEven after you see it, it is still hard to believe!
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6 V4 Q# p" h' Q: \. f; ~5.39.217.77TVBNOW 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 i. I) c& o# o. \0 T1 T. x# d
Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
3 p& m7 Y; D( A  W- [tvb now,tvbnow,bttvbThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 5 u  Y$ j$ [8 Q# N
It is located in the city of Magdeburg, near Berlin.

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$ s. L. x: G  S% q. e( `5.39.217.77The photo was taken on the day of inauguration.tvb now,tvbnow,bttvb; y3 L1 Y+ F: K% _) v
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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' V! m! U. |7 N" f4 l! f2 _5 V5.39.217.77Question:
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。. y% z) V5 ?8 U( ]. B; Z9 u
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,5.39.217.775 ~4 Y: P1 |  [/ b7 U+ u$ k
Or just the weight of the water? 2 e! L  o: X4 w! f' j2 a  H2 ]) _( L
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Answer:
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It only needs to be designed to withstand the weight of  the water!
& b- Y4 r1 c4 W3 V) i公仔箱論壇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
% k4 O1 f6 p9 A' Q# e) S/ _! }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." J) k; v% h) w8 X# ]: g
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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6 h2 p5 M! v$ x2 r5.39.217.77Construction 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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5.39.217.778 D, ^1 S$ e- W: A1 j% B

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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5.39.217.77; e- V+ r5 [9 h4 C2 }- ?
連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇; M8 J" o1 q2 C& D" j) l
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
  B/ G/ N# q; A) Ntvb 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。tvb now,tvbnow,bttvb' k5 t& _3 f8 {
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。公仔箱論壇0 e$ J) ?% b+ |5 a8 A
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
8 V; K$ P( d, U5.39.217.77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。
, w! k; R- e! b) I2003 年正式通航,水橋全長 918 公尺。 而 2003 年之前,在米德蘭運河和tvb now,tvbnow,bttvb6 M6 P4 m: c5 H6 b9 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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