Some time ago, a colleague called to get my opinion on the use of TV cameras for underground inspection of drilled shafts. His query related specifically to relatively tight working areas and “in the ...
Traditional NDT methods like visual inspections and soundings are limited in assessing large, steel-rich transmission foundations, often missing critical defects. Modern NDT techniques, including ...
Crews have begun drilling 5-foot-diameter shafts in front of Bertha, the tunnel boring machine digging the SR 99 replacement tunnel for the Alaskan Way Viaduct. The shafts are being installed where ...
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