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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 p6 [" O1 ?, o5 I8 b. K公仔箱論壇If you are not a Physics person, read on and learn a fact of physics.   
7 F8 L' ?4 \( P) w) ?* Q$ |9 S/ WAMAZING!
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Even after you see it, it is still hard to believe!
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" Y- v' y" r/ z; e5.39.217.76TVBNOW 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。) l5 f$ _* i4 f: @' |% o, {1 D
Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
2 a$ G+ q+ }( a* aTVBNOW 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.
. d& b- v* }+ M/ i: Z. e* y+ ?  iIt is located in the city of Magdeburg, near Berlin.
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* p5 l2 J1 n: F* ~) rTVBNOW 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.
1 l7 ]' w: k4 ~! nTVBNOW 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。To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇- @# a, i9 l3 n/ [6 C/ \/ S' h
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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,
, P6 j8 _' G8 t5 Otvb now,tvbnow,bttvbOr 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! 5.39.217.76- D, y$ n7 E9 G+ H. O6 c
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
6 ?+ {4 _5 Q: l' P. M! KThe 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.7 I( a" n# [$ B0 k! c
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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. `7 p; `: Z; T; `) x9 B; f+ o* O; b; tConstruction 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
1 _: [4 h, f0 g  t- |5 R% e9 T! |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# ]0 u. k9 r# [5 Q/ e% o
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。) ~; o4 V% {  Q/ I
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。
! E5 V; |! G; X  n公仔箱論壇德國重新統一後,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。* z6 V  c- I  Y  I+ C$ 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
& e" I9 c- p7 ~/ c" n% S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,bttvb7 U) _) A" t5 M  b- Z
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
+ p1 Y3 @# X+ T2 p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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