Hillsborough County Florida is using a mix of expanding polyurethane foam and conventional cement grout as a more cost effective means of filling sinkholes. Officials say the mix uses 30 to 40% less grout adding up to a 30% cost savings. The article in the Tampa Tribune did not indicate the contractor or product name that they are using but apparently several agencies in California and other states are using the same material. Story via ASCE SmartBrief.
Failures
Video of Car Swallowed by Sinkhole Related to Tunneling in Cairo, Egypt
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. […]
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Geologic Hazards
40 Foot Sinkhole in Tenn. Stadium Endzone
A large 40 foot wide by 40 foot deep sinkhole opened up just outside the endzone of Austin Peay State University’s Governors Stadium in Tennessee. The stadium is currently undergoing upgrades for next year’s football season. Sinkholes are not unexpected on Austin Peay campus, and the video below shows one example of how the University has actually incorporated the remediated sinkholes into the landscaping. Representatives from the University and the contractor expect the sinkhole will be filled without any problems.
[Updated 1/19/2015] Click through for the video since I can’t figure out how to turn off the auto-play on this one. [/Updated]
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Geologic Hazards