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简介：湖南湘西的德夯大峡谷，要架设一座全世界的最长跨峡谷天桥。然而大桥的索塔距离悬崖边只有几十米，这对大桥的结构安全十分不利，并且峡谷中强劲的对流风对大桥也是一个致命的威胁。如何才能解决这些问题，在300多米的高空架起一座1000多米长的天桥，成为了施工人员必须面对的问题。系列节目《天上有座桥》一一为你详解！收起
《走近科学》 20130317 天上有座桥 （下）
《走近科学》 20130316 天上有座桥 （上）
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