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In the Qinghai-Tibet Railway how was permafrost dealt with

This question belongs to Geological Engineering Case Studies And Applied Geological Engineering Projects
Case Studies and Applied Geological Engineering Projects
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In the Qinghai-Tibet Railway, how was permafrost dealt with?

Answer & Solution
Correct Answer: Option C
Engineers used elevated tracks on pile foundations to minimize heat transfer to permafrost, maintaining long-term stability in a sensitive environment.
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