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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 公仔箱論壇$ d" l$ H6 ?  N+ |6 w

  `/ T" e8 f+ e& ]If you are not a Physics person, read on and learn a fact of physics.   
5 b. D/ U! R1 T4 [公仔箱論壇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!
" F# f  H9 e) [) utvb 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.
$ X% ^0 x- f5 b& f: yos.tvboxnow.comIt is located in the city of Magdeburg, near Berlin.
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0 [; r# i3 M0 Q, [6 zThe photo was taken on the day of inauguration.
4 d# A0 y5 M8 Ptvb now,tvbnow,bttvbTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.7 a5 J) O# T, p/ i7 x% U& Y# J4 W
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Question:
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2 L% _! @1 {, ^. F* mtvb now,tvbnow,bttvbDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,
6 ~. B0 `: s9 W7 I. N. X2 G% vOr just the weight of the water? 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。1 k. J2 m2 J& N* ?

1 M7 s( e+ a4 O5 Itvb now,tvbnow,bttvbAnswer:

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It only needs to be designed to withstand the weight of  the water! tvb now,tvbnow,bttvb. u, c7 R8 s  J$ w2 G
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
1 {' `8 j2 m1 D# L6 SThe 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. 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。1 k% R" k9 q* ~- O$ J1 D

4 t9 v  E" i( H. P# _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.
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+ h8 b/ i' u7 R2 ?  r

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  l7 h/ f% n( F1 P7 ~" 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。
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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
1 f$ V" ?5 j  v9 c" Y- S. H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6 q  d8 S5 W6 @+ z! h
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
% x6 I) c) B( \' g0 qtvb 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。
1 F4 o  K2 G# u7 y3 s+ j9 kos.tvboxnow.com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。' z: U  v7 a- E, \1 V& ?* w5 G" I9 E* 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tvb now,tvbnow,bttvb0 B, j- k* S1 W$ _5 Y+ ?
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。 5 f! n- F& |* f: d+ ^+ ~
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
9 z  J+ Q1 B6 p7 F. j! s7 F" V公仔箱論壇易北河-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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