SPACE DRILL
July 1st, 2003
BY KEITH NUTHALLA GERMAN tunnelling company has developed a boring machine drawing on space technology to include a sophisticated sensor enabling operators to assess oncoming rock conditions whilst drilling continues. Herrenknecht AG, which drilled the Elbe tunnel, has been trialling its new sensor on a 9.8m-diameter TBM shield excavating the Pannerdensch Kanaal twin tunnel near Arnhem, the Netherlands. It has developed the machine with the help of Astro-und Feinwerktechnik Adlershof GmbH, of the German Aerospace Centre DLR, which has made specialist ...
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