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GeoPrac.net is a community of practitioners of geotechnical engineering, geological engineering, engineering geology, geophysics, hydrogeology and related disciplines. We offer members and visitors the foremost collection of geo-related articles, news, and online resources to keep those geo-professionals in practice at the forefront of their respective fields.
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]
Keynetix had over 350 people tune in to webinars offered in January of this year. And they have recently announced 4 more webinars coming up in the next several weeks. The topics of the webinars include:
Mar 14th - Only do it once! - Your guide to efficient geotechnical data entry
Mar 21st - Triggering Vision - Making best use of your environmental data in HoleBASE SI
Mar 28th - Avoiding AGS data errors - The 5 most important things you need to know
Apr 4th - Creating the ultimate desk study tool - is your GIS system redundant?
Here is an update on the Corvette Museum Sinkhole. A contractor has been busy trying to extract some of the priceless Corvettes from the sinkhole that opened up under the museum floor. If you missed the videos of this sinkhole, you have to check it out.
They have successfully removed 5 of the cars. They have been put on display in another part of the museum, with sinkhole mud still on them. But it sounds as if General Motors will be stepping in to help restore them. A video below gives more details on the Corvette rescue. I'm still waiting for official word on some of the geotechnical work being done to stabilize the museum, but haven't come across anything yet. I have heard unofficial that a geotechnical contractor has been working on the site.
A radar survey of Egypt's Valley of the Kings hopes to find some of the missing tombs of Egyptian Queens and Pharaohs that have so far eluded archaeologists. Distinguishing natural faults and other geologic features from potential tombs is one challenge. The article also describes how some other interesting discoveries have been made, including an ancient flood control system that prevented the tombs from being flooded, but rapidly fell into disrepair. [Source: Livescience. Image: Livescience]
Ok, this video has so many safety issues going on, you can't even count them all. But it is darn funny! Just know that this public video on Facebook lets anyone comment on it, so be warned. [Source: Facebook. Image: Facebook]
Over the last 18 months Peter Keeton has been heading up a team at Keynetix to write British Standard and ASTM Standard compliant test definitions, laboratory worksheets and reports for KeyLAB. This work has now been included free of charge with the latest installer of KeyLAB and enables new users of the software to be operational much quicker than ever before.
Peter Keeton has over 40 years of experience working in and managing geotechnical laboratories for Soil Mechanics and was an influential member of the CEN European Standards working group on geotechnical testing. Over this time he has produced many versions of laboratory worksheets for each test.
“By including the latest versions of Peter’s work into the system we have already seen an increase in the number of customers who are running trials of KeyLAB” said Dr Roger Chandler, Keynetix Managing Director. “The out of the box value of KeyLAB has increased significantly with this work and many users are now adopting the system with the standard sheets and only need to modify them with their company logos and details.”
[Editor] Read on for the rest of the press release from GeoPrac sponsor, Keynetix! [/Editor]
When your gypsum plant is capable of producing 900 million square feet of wall board every year, you can't afford to see your process shut down by settlement or problems with groundwater infiltrating or soil erosion beneath slabs and footings supporting your facilities. GeoPrac sponsor URETEK ICR responded to these problems at a LaFarge Gypsum Plant in Florida and stabilized the subgrade and sealed up joints using their geopolymer injection technique. Did I pique your curiosity? Watch the video below for more details, and check out the full blog post by URETEK ICR for more details.
Over the last three years Keynetix have redeveloped their software products to appeal to an international audience whilst increasing their visibility and sales outside of the UK. This strategy is working well and enquiries and interest are at an all-time high resulting in sales outside of the UK increasing by 300% over the last three years. This transformation was recognised by the UKTI when Keynetix reached the final of the UKTI Global Growth Awards in 2012.
[Editor] Read on for additional info about employment opportunities with Keynetix. [/Editor]
Hawthorne, NJ (February 24, 2014) DFI announces a call for entries for its major 2014 Awards. Submissions for the 2014 Awards are due by April 15, 2014. Information and nomination forms are available at www.dfi.org/awardslectures.asp.
The first three awards are presented at DFI’s Annual Conference on Deep Foundations, this year in Atlanta, GA, October 21-24, 2014.
[Editor] Read more for the full list of awards and more about the DFI. [/Editor]
GeoWall is a competition for geotechnical engineering students where they build model mechanically stabilized earth retaining walls (MSE walls). The walls are then tested with a series of design loads and their score is a function of how well the wall performs under loading and how efficient their design was. The competition was held at the 2014 Geo-Congress in Atlanta which is put on by the Geo-Institute of ASCE. Students from universities all around the U.S. participated in this fantastic event! Enjoy the video highlights!
7 years ago today, I wrote my first post for GeoPrac.net! It’s hard to believe I’ve been doing this for that long. I am grateful for all of the visitors, twitter followers, supporters, and of course sponsors that have made it possible for me to share high-quality news and articles for geoprofessionals. I look forward to another great 7 years.
Last year I highlighted a few of my favorite articles and blog posts. This year, I thought I would just go by the numbers to see what the most popular articles and posts have been over the years. Check it out.