AECOM posted a nice summary of their geotechnical expertise on their website a few months ago. It offers a nice overview of what a geotechnical engineer can contribute to a project in terms of expertise, cost savings, and reduced construction time. They also discuss their ‘living legend’, Clyde Baker, who has been involved in design and peer review of high-profile projects around the world, including the Burj Khalifa tower pictured here. [Source: AECOM. Image: AECOM]
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FHWA State Geotechnical Workshops
The FHWA has recently updated its geotechnical engineering site related to their annual State Geotechnical Workshops. All regions with the exception of the Southwest have their Workships this September and October. The next Southwest Geotechnical Engineers Conference will be in April of 2008. The 2007 SGEC was on April 23 – 27, 2007 in Overland Park, Kansas. They have posted PDF versions of the presentations at the conference on their FTP site. Read on for the dates of the upcoming workshops, as well as a link to the FHWA site and the presentation downloads.
Crux acquired by Quanta Services
Specialty geotechnical drilling contractor, Crux Subsurface, Inc. of Spokane, Washington was acquired Quanta Services (NYSE: PWR), an S&P 500 company and a leader in infrastructure services for the electric power, pipeline and telecommunications industries according […]
Mizzou Memorial Union Gets Lift from TerraThane Geotechnical Foam
Univ. of Missouri’s Historic Memorial Union, Built to Honor WWI Dead, Gets New Life with TerraThane Geotechnical Foam
MOUNT AIRY, NC—The Univ. of Missouri’s iconic Memorial Union, with its Gothic architecture and central bell tower, was built to commemorate the 117 Mizzou alumni who lost their lives in WWI, and has been under silent attack. Like all buildings built atop the ancient dry riverbeds of the tributary valleys of the Missouri River, the soil beneath is a mixture of sand, clay, and fine rock particles and highly susceptible to erosion from water. So, while hundreds of thousands of students walked the hallways of the building, water escaping steam pipes far beneath caused severe drying of the soil and destabilized it enough so that erosion created voids, or cavities in the soil, some as large as four feet. In turn, this caused the concrete slab floors atop the voids to become uneven, and the eventual danger of even greater problems loomed large.
A team of engineers went after the problem, including MU alums, Matt VanderTuig, P.E., of Bartlett & West, Jefferson City, MO, and Mark Whitehead, P.E. with extensive structural design and environmental engineering management experience. They suggested to Chris Hentges, president of SIRCAL Contracting, Jefferson City, the general contractor in charge of the job, that instead of using the older method of mudjacking, a highly involved and intrusive process of drilling large holes in the slabs—sometimes removing the slabs entirely—and pumping “mud”, ultra-heavy Portland cement-based grout, into the void, then leveling the slabs, that the university might better be served by using the newer polyurethane foam system method called “foamjacking” or “polyjacking.”
[Editor] Be sure to click through for the rest of the interesting project from GeoPrac sponsor NCFI Polyurethanes and TerraThane! [/Editor]