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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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If you are not a Physics person, read on and learn a fact of physics.   
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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。4 D; r6 w9 J( c
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Even after you see it, it is still hard to believe!
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. `4 H& P) H6 _" }: CMagdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
( Q2 z3 o1 o% B8 p; j" t9 o1 lTVBNOW 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。This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 公仔箱論壇* H: e5 i% a# h) }8 c
It is located in the city of Magdeburg, near Berlin.
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, i* \, h0 ~8 u* D7 G# W8 VTVBNOW 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。The photo was taken on the day of inauguration.tvb now,tvbnow,bttvb+ N. t5 x: p1 P0 \9 X$ m. y
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.5.39.217.76. j% g3 y" K5 s2 u: u8 ?4 E
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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,5.39.217.767 s2 j+ l4 }7 r. a
Or just the weight of the water?
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0 l9 l' ]$ W; q2 v- _# V0 a: ZTVBNOW 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。Answer:
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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。; H* {/ P+ `1 K
It only needs to be designed to withstand the weight of  the water! # ?) C1 N! @% V. J
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) G+ p3 Z0 L6 L) |. E5 n
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. tvb now,tvbnow,bttvb+ P* Q$ x& f: 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3 H5 u6 [4 ~8 V* }' J- c9 }/ `
連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇5.39.217.768 b3 w% Y/ `2 [' \, E
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。公仔箱論壇! R: w$ h2 }- V* P* I6 M3 W) G- S
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。5.39.217.76' m; M* z+ K( {2 N& Q7 m, [
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。0 C3 [1 f- G) w# M4 I& q1 j
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' j) b3 d. c  [( c
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。 tvb now,tvbnow,bttvb; M, m$ Q3 ~+ ^6 c
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。- m) O8 E; k! V. t" 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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  • k23bb

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