Drilled shaft rig falls into hole – Iowa

I don’t think this is a new CME drill rig (Central Mine Equipment Company), but its a model I’m not familiar with.  The CME-550X is designed to minimize ground contact pressure for jobs with wet […]

Drilled shafts have been installed by Malcolm Drilling to form the secant pile retaining walls to support the 400 ft x 80 ft x 80 ft launch pit for the SR 99 tunnel boring machine […]

According to the site Geotechpedia, this tunnel failure occurred on November 29, 2016 around 9am (local time?). The tunnel is located in Yusufeli district of Erzurum in northeastern Turkey. It is somehow related to the […]