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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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6 A) D# M1 f# f8 r( U6 g# S+ f% Wtvb now,tvbnow,bttvbIf you are not a Physics person, read on and learn a fact of physics.   8 C3 d) g- e$ {9 O
AMAZING!

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- c# v  R9 z: D" b" G- J* m公仔箱論壇Even after you see it, it is still hard to believe!

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, C& ?/ M5 P# vtvb now,tvbnow,bttvbMagdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 0 D1 r7 n, Z& f# H
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
' F; t& J- Z0 }5.39.217.76It is located in the city of Magdeburg, near Berlin.

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The photo was taken on the day of inauguration.公仔箱論壇  W8 a; t% K6 B* Q6 Z
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.% [5 B3 V% U/ v; Q" i, X6 I' U
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Question:

0 e1 c% k) ?" U# 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。5.39.217.76  P' ~' b& T6 W* @. m1 D
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,公仔箱論壇% ?! K  a; F; k% U( M8 U5 r
Or 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。9 p' E5 W  W! ?9 y; P
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Answer:

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+ w# `( Y# l9 b% h3 AIt only needs to be designed to withstand the weight of  the water!
/ p. ?; f' i' E, t6 Ftvb now,tvbnow,bttvbWhy? 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公仔箱論壇2 ?( M: A1 N) r& C) M
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.
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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
* V6 @! A" l, e9 l' L$ D4 t9 p% `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。連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇
& Z5 I8 G# w* h4 K9 c! @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。也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
. r- G2 M. ^" p5 v9 z1 {* C* itvb 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。
! y. g$ z& h# B: Rtvb now,tvbnow,bttvb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: |" `  z/ j7 V' x. X" u
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 萬公仔箱論壇) k+ D, s2 D8 Y( m6 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。
+ `! G; Z" }& u' f2003 年正式通航,水橋全長 918 公尺。 而 2003 年之前,在米德蘭運河和% _+ a; Y$ X! \2 d3 I
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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