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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 [3 y9 R& J7 A* A3 Y' L0 g公仔箱論壇If you are not a Physics person, read on and learn a fact of physics.   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。* W1 `& k. V1 }9 p) Q- A% T
AMAZING!

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. L9 b$ S2 m0 |* z1 s8 f. Y5.39.217.76Even after you see it, it is still hard to believe!
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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。. s* Y5 u$ g/ U/ d9 [
Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
- O" Z9 ~1 w0 W) k) D7 p: M5.39.217.76This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
( i: [7 R' ]$ J. R1 h, h) H3 wIt is located in the city of Magdeburg, near Berlin.

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' L6 d( [5 T) N5.39.217.76The photo was taken on the day of inauguration.& i; E/ O* K( W6 J! `( t
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:

( G2 T/ X/ B; X0 W1 gTVBNOW 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。' }# n' I3 V5 S; _6 c
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
5 i" u# ~) {; ]4 ?; r8 |7 q/ S5.39.217.76Or just the weight of the water?
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4 ~6 r+ T- j3 S( T0 _, H, c& qAnswer:
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It only needs to be designed to withstand the weight of  the water!
$ q  Z5 e/ Y* t$ |, P5 z5.39.217.76Why? 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 GermanyTVBNOW 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。/ t' I2 N, o# b* T* y: d0 w
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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0 z7 f. F* C6 Xtvb now,tvbnow,bttvbConstruction 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
9 R/ H" s  q9 R+ s8 X7 ctvb now,tvbnow,bttvb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。& I) W" |" {" b2 b! _
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。tvb now,tvbnow,bttvb) L$ o4 F; g+ A( G) j6 }) Y6 M% g! f
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。
" Z8 @; m; z8 J( l8 x  U5.39.217.76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2 g! A6 l4 a6 R
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
' T$ H7 [. H! A9 hTVBNOW 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。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。
" T4 V7 j  i: P5.39.217.762003 年正式通航,水橋全長 918 公尺。 而 2003 年之前,在米德蘭運河和
/ X7 A1 c8 \$ P! {' r# N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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