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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 tvb now,tvbnow,bttvb8 T& C3 i% r: M& f0 I/ Z

& P3 M, j; n- N# t/ i5.39.217.76If you are not a Physics person, read on and learn a fact of physics.   6 |  p( p* y8 o% o2 G
AMAZING!
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。; Y* R) C- i3 e& a. [  a* G

* Z0 f9 [  K* C! ^" t- f# J& T公仔箱論壇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! tvb now,tvbnow,bttvb' {$ n( N# n3 Y1 r
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. tvb now,tvbnow,bttvb- `7 X2 A8 O' G8 b3 A( p0 ]
It is located in the city of Magdeburg, near Berlin.
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。. D: P% E4 Y7 B1 q8 ?5 G

/ S9 V6 E, O+ |& P公仔箱論壇The photo was taken on the day of inauguration.
' p9 d3 x0 ~" W% u4 ]公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.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 v$ o5 [5 j; a3 F
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Question:
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公仔箱論壇  B. w/ m! p9 W' T! f3 L, a/ s8 Y
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
* T6 `7 u! o* w6 }% otvb now,tvbnow,bttvbOr just the weight of the water?
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: g! q3 d/ [! N; j- L0 X5.39.217.76Answer:

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( o% ]1 b4 D. V3 a- ~2 c( v' ntvb now,tvbnow,bttvbIt only needs to be designed to withstand the weight of  the water! ' A3 O$ b' Q# z9 f9 R1 h9 y
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
% c- C+ l+ J0 O! x$ T0 j% Htvb now,tvbnow,bttvbThe 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.: `0 T, R0 a, Y" ^: {5 `+ n% J
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. . r$ P8 F& C) _1 J" `! [
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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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$ u- m4 R3 e6 Q# b# x/ @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。
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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+ \5 R% |0 @* V
連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇
; f& P3 z, Y% o- o. W" b5 @tvb now,tvbnow,bttvb也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
& O1 O# h  Y* b, w) _2 t% f. Etvb 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。5 V6 Y3 V+ h& j
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。
% h: G$ ~$ ?) H" z5.39.217.76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 Z( _5 @* D% b5 l4 A4 E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,bttvb5 Y: N6 G' y* l3 M
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( g+ X' k' {; {1 [  {5 s+ P6 ~$ F4 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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