<story><title>Thawing permafrost is destroying Arctic cities (2016)</title><url>https://www.theguardian.com/cities/2016/oct/14/thawing-permafrost-destroying-arctic-cities-norilsk-russia</url></story><parent_chain></parent_chain><comment><author>akeck</author><text>Apparently there&amp;#x27;s tech called a thermosyphon to keep permafrost under foundations frozen.&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;mass.pbslearningmedia.org&amp;#x2F;resource&amp;#x2F;nvmms.sci.phys.permafrost&amp;#x2F;preserving-permafrost&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;mass.pbslearningmedia.org&amp;#x2F;resource&amp;#x2F;nvmms.sci.phys.pe...&lt;/a&gt;</text></comment>
<story><title>Thawing permafrost is destroying Arctic cities (2016)</title><url>https://www.theguardian.com/cities/2016/oct/14/thawing-permafrost-destroying-arctic-cities-norilsk-russia</url></story><parent_chain></parent_chain><comment><author>trhway</author><text>&amp;gt;To avoid this, in the 1960s builders of apartment blocks in Norilsk began drilling holes up to 100-ft deep and pouring reinforced concrete piles that stuck into the permanently frozen soil below.&lt;p&gt;100ft would be enough for quite some time. From my short stints in the construction industry (specializing in foundations)  in Siberia during college summers (“stroyotryad”) 30 years ago I don’t remember anything being done to the full specs and without cutting corners. Using full power of my imagination I still can’t picture somebody doing it 100ft there when 30ft would look the same :)</text></comment>