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簡介：湖南湘西的德夯大峽谷，要架設一座全世界的最長跨峽谷天橋。然而大橋的索塔距離懸崖邊只有幾十米，這對大橋的結構安全十分不利，並且峽谷中強勁的對流風對大橋也是一個致命的威脅。如何才能解決這些問題，在300多米的高空架起一座1000多米長的天橋，成為了施工人員必須面對的問題。系列節目《天上有座橋》一一為你詳解！收起
《走近科學》 20130317 天上有座橋 （下）
《走近科學》 20130316 天上有座橋 （上）
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