Ground Improvement for Underground Construction: The Good, the Bad, and the Ugly
Underground construction is "special" because the work may be performed at great depths and under high groundwater pressures. All too often, it seems to take place in urban areas where there is limited...

A Sinking Feeling in Happy Valley: Limited Mobility Grouting Arrests Movement of Emergency Room
Shortly after construction began on a new emergency room addition at the Mount Nittany Medical Center in State College, PA (a.k.a. "Happy Valley"), the existing structure and new construction began to...

Extreme Makeover: Interchange Gets Ground Improvement Facelift
As part of the massive, $159.9 million Interchange 14A Improvement Project in the cities of Bayonne and Jersey City, NJ, the New Jersey Turnpike Authority (NJTA) is realigning 12 ramps and roadways and...

The Rise of UAVs Signals a New Era in Geotechnics: Big Data in Geotechnics is Coming from Above
If you have been following the news, browsing the internet, or even gazing up in the sky, it is likely that you have seen an Unmanned Aerial Vehicle (UAV), also commonly known as Unmanned Aircraft System...

Performance-Based Earthquake Engineering: What Can It Do for You?
There's been a lot of talk, and some confusion, lately about performance-based earthquake engineering (PBEE). Many geotechnical engineers wonder -- what is it, how does it differ from what I've been doing,...

Post-Earthquake Reconnaissance Using Digital Imagery: A Bird's-Eye View
Over the last decade, remote sensing has played an increasing role in geotechnical earthquake reconnaissance through the use of satellite imagery, LIDAR, and unmanned aerial vehicles (UAVs). These techniques...

The 2010-2011 Canterbury, New Zealand, Earthquake Sequence: Impetus for Rethinking the Way We Evaluate and Mitigate Liquefaction
Liquefaction is a common cause of ground failure during earthquakes and is directly responsible for tremendous damage to infrastructure. Evidence of the impact of liquefaction includes failure of bridge...

You Designed It for the Big One, Right? Illustrating and Communicating Uncertainty in a Deterministic Seismic Hazard Analysis
In seismic regions of the U.S. and worldwide, engineers design structures to withstand seismic ground motions resulting from a large, rare earthquake. But definitions of "large" and "rare" depend on who...

Biogeotechnical Mitigation of Earthquake-Induced Soil Liquefaction
Three biogeotechnologies currently under development show promise for cost-effective remediation of liquefaction under existing facilities....

A Foundation Engineering Trip Down the Mississippi: Foundations for Mississippi River Bridges from Minnesota to Louisiana
Huckleberry Finn had his adventure, but for those interested in foundation engineering, this article will float you down the Mississippi River on your own encounter with the many bridges...

Spread Footings Revisited: Geotechnical Advances Lead to Expanded Use for Bridge Abutments
The Minnesota Department of Transportation (MnDOT) has historically used steel shell piles to support highway bridge structures, probably due to a blend of familiarity and efficiency among...

Screw Piles and Helical Anchors: 180 Years of Use in Geotechnical Engineering
Since 1836, screw piles and screw cylinders have been used successfully throughout the world to support a variety of large-scale, civil engineering structures. Their development and use...

Foundation Engineering...102
Most of our textbooks still separate foundation options into two simplistic categories: shallow or deep. That's why so many of us are geared toward thinking about the foundation...

Evaluating Bridges With Unknown Foundations for Susceptibility to Scour: North Carolina Applies Risk-Based Guidelines to Over 3,750 Bridges
Scour occurs when flowing water removes erodible material such as sand and rock. For bridges over water, scour affects the stability of pier and abutment foundations and contributes to...

Bill Shannon and Stan Wilson: Geotechnical Pioneers with a 60-Year Legacy
Starting a business today can pose an array of challenges–planning, financial, legal, and licensing among them. But at its core, a company's founders must be dedicated to...

Geotextile Tube Dewatering
Geotextile tubes are made of high-strength, permeable geotextile that, when filled with a slurry, allow water to drain from the tubes while retaining the solids. They can be prefabricated...

National Usage of Geosynthetic-Reinforced Soil to Support Bridges
The Geosynthetic-Reinforced Soil Integrated Bridge System (GRS IBS) was developed by the Federal Highway Administration (FHWA) almost 20 years ago to help meet the demand for the next...

Very Long-Term Care of Mechanically Stabilized Earth Berms: Limiting the Liability of Future Stakeholders
Since their development over 50 years ago, civil engineering applications of mechanically stabilized earth (MSE) berms have significantly increased. When used as a component of an asset...

Geosynthetic Materials Help Build Optimized Infrastructure
In recent years, the world has begun to realize the negative impacts that limited infrastructure can have on economic growth and the well-being of humankind. Our infrastructure challenges...

Long-Term Performance Monitoring of a Hillside Retaining Wall
To accommodate expansion of the West Point Treatment Plant in Seattle, WA, a 3,000-ft-long soldier pile, tieback-anchored retaining wall was constructed from May 1991 to May 1992. An oblique...

 

 

 

 

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