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.
Geologic Hazards
Huge Florida sinkhole forces authorities to demolish two homes
A large sinkhole near Dunedin, Florida destroyed two homes, but the occupants were not injured. The 90′ diameter by 50′ deep sinkhole opened up in an area of Florida that is prone to sinkhole activity. […]
News
TerraThane Used To Square Off Ravelling Rock Wall
In Louisville, KY a large pit, 40ft deep, 300 yards long x 150 yards wide was dug to build an overflow facility for the city’s combined stormwater and sewage systems. A substantial amount of this excavation […]
Miscellaneous
London Underground trains hit “bulge” in tunnel lining under River Thames
Grouting work done earlier in the week was a possible cause of a bulge in the lining of a train tunnel under the River Thames. Two trains hit the bulge before the line was closed, […]