April / 2009
GeoPrac.net - Monthly Newsletter
GeoPrac Turns Two
 
Greetings!

GeoPrac.net turns two! Geology cake stratigraphy by Khol-y (Flickr) after original design by Tim Babb.It's hard to beleive that GeoPrac has been in existence for 2 years! I'm grateful for the support of all my visitors, members, article contributors and now sponsors. I look forward to another great year with useful and interesting content and hopefully some exciting new features on the site.

This issue highlights the second of a two-part article on Side-Hill Retaining Walls, a noteworthy tunnel failure in Cologne, Germany, Hot GeoThreads, and popular content for the past month.

Regards,

Randy Post, Owner/Editor - GeoPrac.net
Side-Hill Retaining Walls - Part 2 Example side-hill retaining wall
Last month I told you about Part 1 of this article on retaining walls constructed on the side of steep existing slopes. Part 2 contains an overview of various wall type alternatives and their advantages and disadvantages. Also, you can download a full PDF of the article!
 
Popular Content for March 2009 
  1. There and Back Again - Published Mar 27, 2009 (31.6 hits/day, 148 page impressions total)
  2. Video: Freeport Maine Culvert Failure and Road Collapse - Published Mar 23, 2009 (19.7 hits/day, 158 page impressions total)
  3. Side Hill Retaining Walls - Part 1 - Published Mar 12, 2009 (19.1 hits/day, 367 page impressions total)
  4. Subway Tunnel Collapse in Cologne Germany - Published Mar 10, 2009 (18.3 hits/day, 389 page impressions total)
  5. Cologne Tunnel Collapse: Investigations Focus on Tiebacks and Groundwater - Published Mar 24, 2009 (15.7 hits/day, 112 page impressions total)
  6. 2009 International Foundation Congress and Equipment Exposition - Published Mar 24, 2009 (11.1 hits/day, 82 page impressions total)
  7. USGS Landslide Documentary Video - Published Mar 17, 2009 (8.5 hits/day, 120 page impressions total)
  8. New Water Supply Tunnels Underneath New York City - Published Mar 18, 2009 (7.1 hits/day, 94 page impressions total)
  9. Your New Field PC - A Rugged Tablet from Trimble? - Published Mar 2, 2009 (5.6 hits/day, 162 page impressions total)
  10. IFCEE 2009 This Week in Orlando, FL - Published Mar 17, 2009 (5.4 hits/day, 77 page impressions total)
Hot GeoThreads 
Have you checked out the GeoThreads Section? If not you might be missing some of the most interesting geotechnical discussion board and forum posts on the web. We aggregate posts from the forums at Eng-Tips.com and Geoengineer.org and present them to you in one easy locaion. Here's a sampling of some recent GeoThreads.
Cologne Subway Tunnel Collapse
Cologne Subway Tunnel Failure (Photo by DPA via Spiegel Online)In early March there was a tragic failure of an excavation for a new subway station in Cologne Germany. The excavation failure swallowd the Cologne City Archive building, killing two people.  The archive was home to documents dating back to 922 A.D. Below are are several GeoPrac posts on this failure, from oldest to newest.
Amazing Video of Culvert Failure
Culver failure videoCheck out the most amazing video of a culvert failure recorded in Freeport Main this past summer. The sheer force of the water eroding around the pipe is remarkable.
 
Issue: 2
Night Drilling
In This Issue
Side-Hill Retaining Walls
Popular for March 2009
Hot GeoThreads
Cologne Tunnel Collapse
Culvert Failure Video
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Randy Post
GeoPrac.net