本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯 8 C: n; j, Q/ a
( X% M7 l& E3 rIf you are not a Physics person, read on and learn a fact of physics. 公仔箱論壇( L. s& H7 C( D$ d: ^( S# [/ C
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Even after you see it, it is still hard to believe!公仔箱論壇5 M, B4 V7 x1 f6 R
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
0 v9 o& M, s, h$ W# J! {0 Z& J/ Ytvb now,tvbnow,bttvbThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project.
5 I% b* p- d- |% a6 rtvb now,tvbnow,bttvbIt 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。- l; q/ B6 t; I7 {$ J; }# m
7 Y- t2 N5 H3 B% x3 s" Z5 h, K$ xThe photo was taken on the day of inauguration.2 S0 L7 L1 D1 f6 e8 c. f7 l h* o0 r
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.公仔箱論壇9 F0 \; [: G+ b& ~
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Question:
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7 d1 G6 ~. ]4 y) m8 ?' q$ nTVBNOW 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。Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,tvboxnow.com7 p) x& `( q/ a% ~
Or just the weight of the water? 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。/ A/ E( n1 x* D3 E, r
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Answer: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。1 q/ {1 V1 C& j; s
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It only needs to be designed to withstand the weight of the water!
! E/ e6 T$ K0 W7 Ntvb now,tvbnow,bttvbWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded: j/ B' R% L! e& B
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。" @7 E( _0 ?1 v! w
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The Incredible Magdeburg Water Bridge in Germany
5 f) x- p) P# T: w; G8 q/ EThe 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.% n0 [8 h$ ]7 @( k) R
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. 公仔箱論壇6 m0 \% K8 S! V+ [! f: k
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。" t- b9 N" Z- w+ H5 Z8 {. i) i
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' W$ u2 _1 h% k# v% X5 w4 K6 e. C. ^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。; M9 @" z4 a9 C |4 s4 q
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