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Site Characterization Services: Step 1 Data Mining
Its great to see this posted on your website. At Terracon we are serious a
The Evolution of Sonic Drilling, from Inventor Ray Roussy
Thanks for sharing nice information smiley
Novotech Launches Becker Penetration Test Software (NovoBPT)
As an alternative source NovoBPT is also available at http://www.cesdb.com/
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Big Ben lean nothing to worry about PDF Print E-mail
Written by Randy Post   
Monday, 06 February 2012 01:26
BBCs how leaning towers compare graphic

Here is another article on the lean of London's Big Ben clock tower. According to Professor John Burland of Imperial College, it would take 10,000 years for the tower to match the lean of the famous Leaning Tower of Pisa. The tilt is very minor at 0.26 degrees from vertical , and has not changed since the initial announcement was made in October of 2011. [Source: BBC News. Image: BBC Illustration]

 
Geo-Institute Geo-Congress 2012 Conference Younger Member Travel Grants PDF Print E-mail
Written by Randy Post   
Wednesday, 18 January 2012 17:38

Young geotechnical engineers and geoengineering professionals in the first 5 years of their careers may be elligible for a $500 grant to attend the 2012 Geo-Congress conference in Oakland, California March 25-29. See the Geo-Institute link below for more information. Applications are due by February 25, 2012. [Source: Geo-Institute]

 
Ground penetrating radar being used to detect potential sinkholes around sewer pipes PDF Print E-mail
Written by Randy Post   
Friday, 06 January 2012 07:07
July 2010 sinkhole in Milwaukee

When sewer pipes crack and leak, the surrounding ground becomes saturated and soil can migrate into the pipe and leave behind a void. Eventually this void can expand until it undermines the pavement or other structures forming a sinkhole. The same ground penetrating radar technology being used by geophysicists to perform subsurface characterization and by the military to detect roadside bombs in being adapted to detect these voids before they reach the surface. Researchers at Louisiana Tech University are developing a robot to traverse sewer pipes and scan around the pipe for potential voids using the GPR. The research is being performed with $3M from NIST and $3.2M from Cues, Inc. a Louisiana sewer inspection company. Additional trials are slated to take place this month. [Source: NOLA.com. Image: AP File Photo/Mark Was via dailyreporter.com]

 
Geotechnical Request for Proposals Template Documents PDF Print E-mail
Written by Randy Post   
Wednesday, 04 January 2012 06:26

The Structural Engineers Association of Michigan has template documents for a geotechnical RFP.

The intent of the RFP is to assist the Structural Engineer with the general requirements of information usually desired from the report. It also provides the perspective from the Geotechnical Engineer's point of view in asking the Structural Engineer to provide a detailed description of the proposed job.

The RFP is targeted at projects in the range of $10M but could be adapted for smaller projects. The documents were drafted in 2001 by members of SEAMi with input from members of ASFE. [Source: SEAMi.org]

 
Final Bimrocks Paper? PDF Print E-mail
Written by Randy Post   
Monday, 12 December 2011 21:12

Bimrocks is a term coined by my colleague Ed Medley, a fellow geopractitioner (a term he also coined).  The former term refers to "block-in-matrix-rocks" where blocks of geotechnically significant rock "float" in a matrix of weaker material.  I received the following email from Ed the other day which may be of interest to folks who deal with bimrocks:

I have, I think, written my last technical paper on bimrocks. There is little more I can preach! That paper (written with D. Zekkos) is  Geopractitioner Approaches to Working With Anti-Social Melanges, a chapter in the book  Special Paper 480: Mélanges: Processes of Formation and Societal Significance, by John Wakabayashi and Yildirim Dilek, published by the Geological Society of America. Wakabayashi and Dilek’s  full-text introduction to the volume is available at the GSA website.

Last Updated on Tuesday, 13 December 2011 07:46
 
Proposed Specifications for LRFD Soil-Nailing Design and Construction PDF Print E-mail
Written by Randy Post   
Wednesday, 30 November 2011 15:31
Proposed Specifications for LRFD Soil-Nailing Design and Construction

The current edition of the AASHTO LRFD Bridge Design and Construction specifications do not have specifications for soil nail retaining walls. This TRB publication is meant to be an interim solution for agencies who still wish to take advantage of the advantages of soil nail retaining walls for certain situations. [Source: TRB. Image: TRB]

 
New Falling Weight Deflectometer Calibration Procedures PDF Print E-mail
Written by Randy Post   
Thursday, 17 November 2011 15:41
Falling weight deflectometer from Dynatest

A report titled 'Falling Weight Deflectometer Calibration Center and Operational Improvements: Redevelopment of The Calibration Protocol and Equipment' has been published by the FHWA. This report is the result of a pooled fund study that has resulted in revisions to AASHTO's R32-09 calibration procedure for the FWT. There is also new calibration software, WinFWDCal that came out of this research. [Source: FHWA. Image: Dynatest]

 
Federal Geographic Data Committee Launches New Geospatial Website PDF Print E-mail
Written by Randy Post   
Tuesday, 15 November 2011 04:28
Soil survey map created at the US Fedaral Government's new Geospatial Platform website

WASHINGTON, D.C.—The federal government and its geospatial partners today unveiled www.geoplatform.gov, a prototype Geospatial Platform website providing an initial view of the future of user-friendly, integrated, federal data collections on common geographic maps.

This type of interface seems to be the future of GIS and mapping. Many agencies have something similar for their own data, but how great will it be when you can combine data sets from various sources to create your own maps?

[Source: US Department of the Interior via USGS. Image: GeoPlatform.gov]

 
Design Guidelines for Increasing the Lateral Resistance of Highway-Bridge Pile Foundations by Improving Weak Soils PDF Print E-mail
Written by Randy Post   
Monday, 31 October 2011 05:47
Design Guidelines for Increasing the Lateral Resistance of Highway-Bridge Pile Foundations by Improving Weak Soils

Lateral loads on bridges can result from earth pressure, seismic forces, wind loads, traffic or even ship impact or wave action. In cases where lateral loads govern, it is not uncommon to see designers add additional piles or drilled shafts or increasing the size of pile or shaft caps. This document by the Transportation Research Board provides recommendations for ground improvement methods for improving lateral resistance of weak soils, including a simplified approach for assessing the lateral resistance of improved soils using commercially available software packages. [Source: TRB. Image: TRB]

 
UA's George Davis publishes new version of popular structural geology text PDF Print E-mail
Written by Randy Post   
Monday, 17 October 2011 06:07
George Davis presents the new edition of his Structural Geology textbook at the 2011 GSA conference

Many geoengineers and geologists have used the Structural Geology of Rocks and Regions textbook in structural geology class, and beyond. One of the authors, Dr. George Davis of the University of Arizona (emeritus) was recently on hand at the GSA's annual meeting to unveil a new edition of the book being published by Wiley. According to the AZ State Geologist's blog, the new edition will be available in mid-November.

On a personal note, I was fortunate enough to have Dr. Davis as my professor for structural geology at the U of A when I was an undergrad in geological engineering. I believe it was his last semester teaching the undergraduate course before he accepted a position as provost of the University. I still remember his engaging lectures and field trips. He was one of the very best instructors I had in my time at the U of A, for both my bachelors and masters. [Source: Arizona Geology. Image: Arizona Geology blog]

 
Geoprofessionals Pessimistic about Economy PDF Print E-mail
Written by Randy Post   
Wednesday, 12 October 2011 16:36

Every 6 months, the Business Practice Committee of ASFE conducts an "Industry Snap Shot" survey to gauge the state of our industry. They just had their fall meetings in Phoenix where the results from September's survey were presented. 60% of respondents were pessimistic about the next 6 months compared to 40% in the previous survey. Click through to ASFE for the full PowerPoint slideshow (It's only a few slides). [Source: ASFE: The Geoprofessional Business Association]

 
Design Guidelines for Increasing the Lateral Resistance of Highway-Bridge Pile Foundations by Improving Weak Soils PDF Print E-mail
Written by Randy Post   
Tuesday, 11 October 2011 17:09

Design Guidelines for Increasing the Lateral Resistance of Highway-Bridge Pile Foundations by Improving Weak Soils

TRB's National Cooperative Highway Research Program (NCHRP) Report 697: Design Guidelines for Increasing the Lateral Resistance of Highway-Bridge Pile Foundations by Improving Weak Soils examines guidance for strengthening of soils to resist lateral forces on bridge pile foundations.

The report presents computational methods for assessing soil-strengthening options using finite-element analysis of single piles and pile groups and a simplified approach employing commercially available software. [Source: TRB. Image: TRB]

Last Updated on Tuesday, 11 October 2011 00:11
 
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