Fred Howard Kulhawy was born in Topeka, Kansas on September 8, 1943 to Fred and Gloria (Hahn) Kulhawy. He spent his childhood and early adulthood in New Jersey, where he received his B.S.C.E. in 1964 […]
A private homeowner’s retaining wall experienced a major failure near Colorado Springs, causing the evacuation of several families. According to KKTV, the homeowner obtained a permit to construct a 20 foot high retaining wall, however […]
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It is with great sadness that I report the passing of a mentor and former colleague, Dr. Ed Nowatzki, PE, PhD, D.GE, F. ASCE. His obituary can be found here. I first met Ed when […]
The largest known undersea landslide occurred over 8,000 years ago off the coast of Norway. The volume of material that moved is mind-blowing, over 4.6 X 1012 cubic yards or 850 cubic miles! Known as […]
MOUNT AIRY, NC—Highways around Houston, TX, known as one the nation’s worst cities for traffic behind Los Angeles, D.C., and Atlanta, need constant repair, but can’t be closed while the work is done. Nortex Concrete Lift and Stabilization, Inc., a Ft. Worth, TX company, recently completed a whirlwind repair project on one of the city’s busiest corridors in the NE quadrant where I-10, 610 Loop, I-59, and I-69 feed millions of cars daily to, from, and around Harris County.
Normal groundwater erosion beneath the highways causes the concrete highway slabs to drop, roadway depressions, uneven bridge approaches, and uneven joints that make driving bumpy and uncomfortable, dangerous, and causes severe wear and tear on automobiles.
To make the repairs, the Texas Department of Transportation, TXDOT, brought in Nortex. The company carefully planned out the repairs for the half million pound project, and sent out four crews each with it’s own box truck rig to use a relatively new technology called “foamjacking.” Foamjacking uses high-density polyurethane foam to fill the subterranean voids, and lift the concrete slabs to proper level. “We’ve been lifting and stabilizing roadways with polyurethane foam since we got into the business back in 2003,” says Casey Derosa, asst. gen. mgr. of Nortex. “It’s a far superior method versus the old way of mudjacking.” Mudjacking is a ubiquitous term for a mix of mud, sand, cement, crushed limestone, and water hydraulically pumped into large holes drilled into the concrete slabs to fill voids and level the slabs. Mudjacking uses more and much larger equipment, and requires larger holes to be drilled. It typically requires the roadway to be closed much longer than foamjacking, and takes more time to clean up.
[Editor] Click through for the rest of the press release from GeoPrac sponsor NCFI Polyurethanes. [/Editor]
Fugro has completed one of the largest offshore geotechnical investigations in history according to Hydro-International.com. The investigation was performed by two vessels, MV Greatship Manisha and MV Bucentaur (pictured here), for DONG Energy’s 1.2 gigawatt […]
What will 2015 hold for the tunneling industry? Tunnel Business Magazine asked a panel of 4 industry experts that question. The panel consisted of a Colorado School of Mines Professor as well as reps from […]
A team from Northeastern University has a very interesting van used for quantitatively assessing pavement condition using a variety of sensors. They use cameras, laser profilers, accelerometers on axles, pressure sensors in the tires, microphones, […]
Not too much to say about this, but check out the photo. The entire westbound portion of US Highway 52 near the Ohio River was closed last week as a house-sized boulder and other rockfall […]
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