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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 5.39.217.76. R- x6 F8 O" n! h/ @8 I0 X
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If you are not a Physics person, read on and learn a fact of physics.   
7 A4 d! J  P# w1 ~6 l+ |( i2 |6 G公仔箱論壇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。! j- c1 V# y  t5 s

2 G, L& b' K3 {7 z# @! e' @5.39.217.76Even after you see it, it is still hard to believe!

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& t. h! I3 M- j: _- P+ I- V9 DMagdeburg Water Bridge in Germany  
What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!   p2 v4 E2 q( {' l$ s" {
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
# @( G( B0 a  M5 K( j. GIt is located in the city of Magdeburg, near Berlin.
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& S  u- u4 q/ Y* {: v: u5.39.217.76The photo was taken on the day of inauguration.
$ k8 I" T$ B3 j公仔箱論壇To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
& F% m4 U' V* G6 {' m8 ytvb now,tvbnow,bttvbTVBNOW 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。) K: n! p0 A) _7 i; k3 C
Question:

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9 S' @3 Z2 h% s" B# [8 d- l: ^) PDid that bridge have to be designed to withstand the additional weight of ship and barge traffic,tvb now,tvbnow,bttvb: a( y4 v( m9 H8 o! n* d. M4 F
Or just the weight of the water? 5.39.217.76% V6 Z; ^# u+ H2 f' r1 I
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Answer:
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* {2 L  k) I; |! v4 ?3 h( GIt only needs to be designed to withstand the weight of  the water!
1 G6 x8 d4 \6 i2 x6 P- ~* l: e公仔箱論壇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
2 ]4 |% [# P  ?9 G% z/ ^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.
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。! A9 g+ M) g/ H

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, N- E( u) @: `tvb now,tvbnow,bttvb" F* X8 l. G% t& j: G! ~1 Z$ E

& [+ I: z. R6 G* g( K9 K/ STVBNOW 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tvb now,tvbnow,bttvb# t8 [# y7 @0 A/ {, |: R
連通兩條水道的最初構思,而羅騰湖 Rothensee 升船機及大橋錨碇tvb now,tvbnow,bttvb+ x: `8 H; F4 `1 G1 w4 s
也於 1938 年安裝就位,但在二次大戰期間,建設工程被推遲。
& A8 r' S! k* a: y- 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。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, [& w. G$ V. p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。
6 C; W& \% I' ^  m7 T' E: O3 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 萬公仔箱論壇2 b  ?# x! @) X- M
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。 ! h! z+ g8 ~( l: D7 J7 G
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
' j- {! p1 u0 U6 Z) Q4 {5.39.217.76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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