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About 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.

Alaskan Way Viaduct Settles after Bertha TBM Access Pit Dewatering
GeoNews - Project Related
Written by Randy Post   
Wednesday, 17 December 2014 23:21
Contours of Settlement around the Bertha access pit de-watering as of December 10, 2014

Areas surrounding the access pit being excavated to rescue the stalled Bertha TBM have experienced settlement as much as 1 to almost 1.5 inches according to a draft figure released by WSDOT on December 11, 2014. The aging and seismically deficient Viaduct itself has experienced 1 inch of settlement as well. Structural engineers have inspected it as well as numerous buildings in the area and have not found structural damage. The settlement is thought to be related to the dewatering associated with the access pit construction. The excavation was within 3 feet of the bottom when the settlement issues were first announced on December 5, and WSDOT has since allowed the contractor to complete the excavation. [Source: Read more information in the update provided by the WSDOT Alaskan Way Viaduct Replacement Project team. Image: WSDOT]

Bentley's Year in Infrastructure 2014 Conference Wrap-Up
GeoNews - Conferences
Written by Randy Post   
Wednesday, 17 December 2014 23:09
Greg Bentley gave a keynote on The Year in BIM Enhancements at the Year in Infrastructure 2014 Conference

Bentley's annual infrastructure conference was again a tremendous success. Held in London in early November, the event provided infrastructure executives from around the world with valuable insights on business and technology drivers and how they are shaping the future of infrastructure delivery and investment returns. Among the many presentations and materials presented during this information-rich event were keynotes, Be Inspired Finalist presentations, and Advancement Insights—an annual reporting of innovative technology, best practices, and project strategies for advancing infrastructure design, delivery, and performance. For access to the keynotes, Be Inspired presentations and more, visit the virtual press kit page for the Year in Infrastructure 2014 Conference. Bentley is a sponsor of [Source: Bentley. Image: Bentley]

Harl Aldrich, Haley & Aldrich Co-founder, Dies at 91
GeoNews - In Memoriam
Written by Randy Post   
Monday, 15 December 2014 23:12

Harl Aldrich, founder of Geotechnical firm Haley & Aldrich, passed away on November 24, 2014 at the age of 91

Haley & Aldrich Founder and Chairman Emeritus Harl P. Aldrich, Jr. died on November 24, 2014 in Concord, MA at the age of 91. Dr. Aldrich was a leader in geotechnical and civil engineering, and his legacy is seen not just in his home city of Boston, but also across the country where his pioneering spirit has endured in the firm he co-founded. [Editor] Text modified from a Haley & Aldrich Press Release. [/Editor] [Source: View the rest of the press release from Haley & Aldrich via The GBA Newsletter. Image: Haley & Aldrich]

Last Updated on Tuesday, 16 December 2014 06:15
Pond Embankment Stabilization with Geopolymer Injection
Articles - Ground Improvement
Written by Ty Taylor   
Wednesday, 10 December 2014 07:27


Geopolymer injection to sto seepage[Editor] An effluent pond in southeast Texas was suffering from years of erosion.  Recently, an escalation of subsurface water seepage through the pond’s embankment threatened the community’s main water source. URETEK used their versatile geopolymer product to inject beneath the embankment to seal off the seepage.  The project was a huge success! Read on for this contributed article from GeoPrac sponsor URETEK ICR. [/Editor] 

Last Updated on Wednesday, 10 December 2014 07:36
Getting Under Your Feet – The Revolutionary Technology of Geogrids
Articles - Miscellaneous
Written by Tensar International   
Thursday, 04 December 2014 22:13

Tensar's Triax Geogrid Most people reading this will have driven along a highway recently. But did you ever stop to think about how it stays up? With all the trucks and cars that speed along the average highway every day, it’s a wonder they don’t collapse!

Now how would you feel if you heard that the reason these highways and bridges and embankments manage to stay so stable is all thanks to the simple triangle?

[Editor] Read on for this contributed article from Tensar International! [/Editor]

Last Updated on Friday, 05 December 2014 07:50
Deep Excavation Geotechnical Software Update
GeoNews - Software Updates
Written by Randy Post   
Wednesday, 03 December 2014 22:33

DeepEX 2015 Geotechnical Software for Shoring DesignDeep Excavation LLC is releasing the revamped 2015 version of their deep excavation software DeepEX 2015. DeepEX is used by more than 1000 engineers worldwide. The current version includes an improved wizard, reports, analysis capabilities. In DeepEX 2015 is the only software that allows you to estimate the cost of your actual 3D excavation, and prepares a quantity take off for you.

For more information and to download a 30 day free trial visit

Check out a 10 min video that shows you how you can create a 2D braced excavation model, as well as a 3D model at the same time in DeepEx 2015.

They are offering a special promotion until Dec. 31st, 2014. Contact for more information.

Last Updated on Wednesday, 03 December 2014 23:10
Dataforensics Announces Major Update to pLog Tablet
GeoNews - Press Releases
Written by Randy Post   
Monday, 24 November 2014 13:07

pLog Tablet by DataforensicsDataforensics, developer of geotechnical and geoenvironmental data management solutions, announces that a major update for pLog Tablet is now available for immediate download from the Google Play store.

This latest update of pLog Tablet enhances usability by adding the following features:

[Editor] Read on for the rest of the press release from GeoPrac sponsor Dataforensics! [/Editor]

Last Updated on Monday, 24 November 2014 13:21
FHWA Geotechnical Team and NHI To Offer Virtual World Training
GeoNews - Available Resources
Written by Randy Post   
Friday, 21 November 2014 08:15

FHWA Geotechnical Team and NHI will offer training in a virtual worldEconomic times have been hard for federal, state and local transportation agencies as well as industry representatives since the recession started.  Getting approval to travel for conferences or training classes has been difficult if not impossible.  The Geotechnical Team at the FHWA and the National Highway Institute (NHI) has come up with a solution to that problem by offering training in an online virtual environment. In the near term they will be offering a tour of the virtual training venue and technology showcase and plan to have more demos in the coming months.  They will offer the first training at the March 2015 International Foundation Congress and Equipment Expo (IFCEE) in San Antonio, Texas.

[Source: Check out more info in the NHI and FHWA Informational PDF via ADSC]

Last Updated on Friday, 21 November 2014 08:17
Video: Secant or Tangent Piles
GeoNews - Available Resources
Written by Randy Post   
Friday, 21 November 2014 00:42

I like Hayward Baker's series of videos using animations to demonstrate different geotechnical construction methods. This video demonstrates how tangent pile shafts or secant pile shafts are constructed. Check out the video. Note: Hayward Baker is a sponsor of this website.

[Source: Hayward Baker YouTube Channel. Image: YouTube]

Last Updated on Friday, 21 November 2014 08:01
Video: Massive Earthworks to Stabilize US 89 Landslide
GeoNews - Geologic Hazards
Written by Randy Post   
Friday, 21 November 2014 00:40

By April of 2015, the contractor for Arizona DOT's US 89 Landslide Stabilization project will have move over 1 million cubic yards of material to build a massive stabilizing berm. They are using CAT 773 haul trucks to move material, equipment more commonly seen in mining applications. Check out the video!

[Source: ADOT YouTube Channel. Image: YouTube]

Last Updated on Friday, 21 November 2014 07:53
The Case for BIM in Geotechnical Data
Articles - Software and Spreadsheets
Written by Gary Morin   
Tuesday, 18 November 2014 06:32

Incorporating geotechnical data in BIM allows considered design optioneering and refinement at the outset of a project; minimises geotechnical risk in construction and enables cost-effective repairs and maintenance of assets throughout the project’s lifetime. Image courtesy of Mott MacDonald.

Getting the Message Across

Applying Building Information Modelling principles to geotechnical data will reinforce the message that geotechnics is an integral part of every phase of a project – not just site investigation, argues Gary Morin, Technical Director, Keynetix.

[Editor] In this contributed article, Gary describes the justification for using BIM for geotechnical data.  Among those benefits are the ability to perform detailed alternatives analysis and optioneering, reduction of risk during construction, and the ability to perform cost-effective repairs and maintenance during the lifetime of the geotechnical asset. Click through to read the full article. Keynetix is a sponsor of [/Editor]

Last Updated on Tuesday, 18 November 2014 07:15
GeoPrac Newsletter 051
GeoNews - Miscellaneous
Written by Randy Post   
Friday, 07 November 2014 05:07

The 51st edition of the newsletter was published this week. Content includes:

  • Let's do better as mentors
  • Hayward Baker Atlanta Stadium
  • Chuck Ladd In Memoriam
  • Port of Oakland Soil Stabilization
  • Most Popular GeoPrac Content
  • Underwater Landslide in 2011 Tsunami
  • Lidar Applications in Landslides

Check it out if you missed it, and be sure to subscribe to future newsletters!

Last Updated on Friday, 07 November 2014 05:25
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