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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 tvb now,tvbnow,bttvb: l0 F" t# N( W& T: S/ ~3 q+ Z0 Y

4 x8 ~# x; q' I公仔箱論壇If you are not a Physics person, read on and learn a fact of physics.   ) B% o( t! b5 t# ?) K
AMAZING!

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Even after you see it, it is still hard to believe!

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6 U* y  ?$ o8 p% l# _! Y! Z2 g5.39.217.76Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇/ h( S" d, o! C  g9 _' F
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
" V8 t# a/ J7 ~7 m( c8 T5.39.217.76It is located in the city of Magdeburg, near Berlin.

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The photo was taken on the day of inauguration.
0 G- `) a5 z( C, b3 e. l1 d5.39.217.76To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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/ C& d  Z+ Y; V- H# E8 e& fTVBNOW 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。Question:
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
0 N: e' a- g5 E9 L- 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。Or just the weight of the water? 公仔箱論壇4 G9 ~3 e  j" c) @, r7 U
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Answer:

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It only needs to be designed to withstand the weight of  the water!
7 U5 g. k3 J& G1 \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
! v% U5 A& _# U$ E  t& B& Ztvb now,tvbnow,bttvbThe 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. " ~$ z+ G, Y) C" ]( Q
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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
& {! |7 _/ U4 H5 g7 a5.39.217.76連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇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。& G, Z- t! ~; A6 y' b& F
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。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。; B9 s, Y+ N* i0 C# @
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。公仔箱論壇0 G* [$ t) e5 n0 S" G& S! C3 k! v: z
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。
  M" Y! U# v4 ~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。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 萬5.39.217.769 h! V- i5 H, H
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。
  q& q) A& t. q9 _5 X# V- a5.39.217.762003 年正式通航,水橋全長 918 公尺。 而 2003 年之前,在米德蘭運河和
2 s$ f. S; g; ~7 Y4 p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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多谢您的分享!
first time heard & saw it, thanks for sharing, thanks tvboxnow!!
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