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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 ; o% D. a' }- U. Z7 K

: P" G+ ]; b# \+ f2 MIf you are not a Physics person, read on and learn a fact of physics.   tvb now,tvbnow,bttvb- ~5 Y" S% y! V4 e4 n% q6 z
AMAZING!

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

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1 i% d0 @7 K2 AMagdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! 公仔箱論壇" K: A6 }# s7 s/ \. ]/ P( G% d
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! q" O+ [% ^: f# f
It 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4 N9 y$ k! _# b
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:

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" C$ E* N) m1 d6 ?! QDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,& T) k6 B7 |% j( K$ n3 ?
Or just the weight of the water?
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Answer:

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5 u6 g# l( W- T  F  gIt only needs to be designed to withstand the weight of  the water! 5.39.217.76; _4 n7 u" r( [. O7 n+ ]
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 Germany5.39.217.76% s' T1 [4 B% v. P9 |1 e
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公仔箱論壇, H' w* K2 @; e# R8 U* C' D$ g
連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇
: Q  m( V1 x  P3 `; _5 v* Z: N% X: DTVBNOW 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。3 Q1 ^6 I$ I* D
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。; Z7 t% f- l- ]# n* Y3 `2 n
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。公仔箱論壇. n( I- l  j% O; 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 萬0 {0 r, g5 L- B% f  W- n
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。
* B! ~9 n& Y( H' U) z  DTVBNOW 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。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tvb now,tvbnow,bttvb4 C+ i8 y5 _0 C1 v0 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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多谢您的分享!
first time heard & saw it, thanks for sharing, thanks tvboxnow!!
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