Johannasburg Sinkhole Opens after Tunnel Collapse

On June 11, 2002, a 150-foot wide and 60-foot deep sinkhole opened up in Pine Hills, Florida and came within a few feet of two 3-story appartment buildings. Geotechnical and Environmental Consultants (GEC) was contacted by the owner of the site to design emergency temporary and permanent stabilization measures to protect the buildings. The sinkhole mitigation began with a chemical stabilization of the soil using an injected sodium silicate chemical grout (incidentally, that work was performed by John N. Puder, Inc., recently acquired by Moretrench) to stabilize the sands underneath the buildings and adjacent to the sinkhole. After some GPR surveys, borings and other investigations, final sinkhole repair consisted of a 200-foot long wall omprised of interlocked 36-inch diameter steel tubular piles that extended to a depth of 50 feet. They were driven by Giken America Corp. using the press-in method which helped to avoid damage to the adjacent buildings. The entire stabilization was completed within 1-month of the initial sinkhole collapse! Click through for this fascinating video. (Photo credit Giken America Corp. by way of GEC)

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A sinkhole formed at the beginning of August near a brine production operation in Bayou Corne near Baton Rouge, Louisiana. The sinkhole, now referred to as a slurry hole, measures roughly 600 ft by 300 […]

On September 3, a sinkhole opened up on a downtown Cairo street, swallowing the car pictured here. According to the description accompanying the video uploaded to YouTube by TheDailyNewsEgypt, the sinkhole was related to tunneling activities for the Cairo Metro line that is currently under construction. Click through for the video. […]