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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 公仔箱論壇# o; z8 x' X, V" K2 g. @
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If you are not a Physics person, read on and learn a fact of physics.   公仔箱論壇; S9 S8 T; l- e- V  o
AMAZING!

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Even after you see it, it is still hard to believe!
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Magdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
1 D+ ~, {- {2 O, I+ R+ y5.39.217.77:8898This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. 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。' @" K0 S- P3 _  v4 N: R# Z
It is located in the city of Magdeburg, near Berlin.

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The photo was taken on the day of inauguration.5.39.217.77:88982 B4 N1 M: a* B6 M! w! K% t( o8 _
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.* j' n9 ^3 Y- q

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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
# k5 J0 {7 v2 _0 D3 j" BOr just the weight of the water?
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/ {2 H  l% B3 X6 `% Ltvb now,tvbnow,bttvbAnswer:
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It only needs to be designed to withstand the weight of  the water! tvb now,tvbnow,bttvb5 P, e7 U% o, l+ u6 {
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 Germany4 s. q6 S2 g0 x
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." q+ Z, \# A6 {! `- P' h# }
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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3 C7 j* r3 ?, y; ?2 l" hConstruction 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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! z9 v6 G' O1 p" 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。
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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。' m" N& k+ w  C% Q& J2 b& [- U
連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇
" t* G- P2 ]' `' \1 T0 F; P也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
( f- Z) y4 v: X1 ?4 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。
; J( G, A$ N8 t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。tvb now,tvbnow,bttvb- V+ u6 r3 L  E! Q! G( N
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 萬5.39.217.77:8898% H8 g2 v! O2 \
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。
& a5 Z+ }  h8 v5.39.217.77:88982003 年正式通航,水橋全長 918 公尺。 而 2003 年之前,在米德蘭運河和. K3 X/ y" e5 u7 q1 k( Q
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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