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Articles
How to Find Existing Geotechnical Subsurface Information PDF Print E-mail
Articles - Field Investigations
Written by Rey Villa   
Tuesday, 25 September 2012 22:15

Geologic map of Southern Florida

So, you've landed a job as a Geotechnical Engineer. What now? We all know that before performing any site investigation it is prudent to gather as much information that you can about the project site. There are so many resources out there that can help us get an idea of what the subsurface conditions are so that we can select the appropriate subsurface exploration techniques.

Below is a list of extremely useful sites that can help you gain some indication as to what the subsurface conditions are before planning the subsurface exploration program.

[Editor] Click through for the rest of this contributed article from Rey Villa. [/Editor]

Last Updated on Tuesday, 25 September 2012 22:17
 
High Octane Solution Solves Raceway Dips PDF Print E-mail
Articles - Ground Improvement
Written by Ty Taylor   
Tuesday, 24 July 2012 22:30

High Octane Solution Solves Raceway Dips

The modern race car being driven on the professional circuit today is an aerodynamic wonder. With mere inches of ground clearance, the car is designed to utilize airflow over the body of the car to force the tires down firmly against the pavement, maximizing traction. The objective, of course, is to safely maximize speed.

Professional race car drivers criticized Texas Motor Speedway regarding“bumps” in the 1.5-mile track between turns one and two. They said that these bumps limited them from running “multiple grooves” on the track (the “side-by-side” racing that NASCAR fans crave) and made it difficult to control cars coming out of turn one.

Texas Motor Speedway responded to this criticism immediately, engaging surveyors to shoot elevations across the track to detect any track deficiencies. It was determined that the unlevel areas were not “bumps”; to the contrary, the problem was, in fact, areas of settlement, dubbed “Dale's Dips” by the press.

[Editor] Read on for more on this interesting project from GeoPrac sponsor URETEK ICR. [/Editor]

Last Updated on Monday, 23 July 2012 12:35
 
Environmental Data Management for Site Holders PDF Print E-mail
Articles - Geoenvironmental
Written by EarthScience Information Systems Pty Ltd. (EScIS)   
Sunday, 08 April 2012 20:58

Many site-holders engage a variety of consultants, laboratories, and in-house staff to collect, manage and report their environmental data.

Unfortunately this often results in data being trapped in various pdf reports, GIS layers, emails, excel workbooks, or even in hard copy. This data becomes increasingly difficult and time consuming to manage and retrieve as more data is collected and as legislative reporting requirements become more rigorous.

[Editor] Click through for the rest of this interesting article. [/Editor]

Last Updated on Sunday, 08 April 2012 22:18
 
Stabilizing Wind Energy PDF Print E-mail
Articles - Ground Improvement
Written by Ty Taylor   
Monday, 06 February 2012 23:30

Generic wind turbine photo

Recently, URETEK ICR was asked to review a project involving lifting and stabilization of 10 precast transformer pads at a wind farm located in South Dakota.

The pads had settled to varying degrees with 8 of the 10 having settled 1 (±0.5) inch and requiring only stabilization and the two remaining, with settlement in excess of 3.5 inches, requiring lift and stabilization.

[Editor] Click through for more on this interesting project by GeoPrac.net sponsor, URETEK ICR! [/Editor]

Last Updated on Wednesday, 08 February 2012 23:40
 
Environmental Data Management for Groundwater Contamination PDF Print E-mail
Articles - Software and Spreadsheets
Written by EarthScience Information Systems Pty Ltd. (EScIS)   
Sunday, 02 October 2011 23:44

ESdatESdat Environmental Data Management Software has been used to manage and report on large datasets generated from an investigation of groundwater contamination on an industrial facility in Adelaide. ESdat was used in managing site data and the maintenance of conceptual model and time series outputs at a complex site over an extended period. [Editor] Click through for the rest of the article. [/Editor]

 
Ever get that sinkhole feeling? PDF Print E-mail
Articles - Ground Improvement
Written by Ty Taylor   
Monday, 22 August 2011 21:58

Ever Get that Sinkhole Feeling?

It takes planning and good leadership to decide on an effective solution to problems associated with a building asset. Recently, a large wholesale warehouse facility in Cincinnati began to experience large sinkholes across a significant portion of their customer parking lot. Unable to determine the problem at that time, store management was forced to close a portion of the parking lot, inconveniencing their customers. This particular parking lot is unusual in that a drainage system is located directly under the parking lot, consisting of a network of pipes spanning 250 feet in length and 12” in diameter. Joint separations in the underground drainage piping had caused enough soil erosion to create sinkholes in the asphalt. Engineers were concerned that other unknown sinkholes could cave in anytime, resulting in further costly damage, and potentially posing safety hazards to customers.

[Editor] Click through for the rest of the article. [/Editor]

Last Updated on Wednesday, 08 February 2012 23:44
 
The Use of the Pile Driving Analyzer for Installing Pile Foundations PDF Print E-mail
Articles - Deep Foundations
Written by Scott A Barnhill   
Tuesday, 01 March 2011 22:40

Typical pile driving analyzer or PDA setup

[Editor] The pile driving analyzer or PDA is used to measure the response of piles during driving. It was originally developed to analyze pile drivability, but is sometimes used as a substitute for pile static load tests to determine . Mr. Scott A. Barnhill, P.E., Executive Vice President of consulting firm GeoEnvironmental Resources, Inc. located in Virginia Beach, Virginia has seen PDA being used and misused over his 33-year career. In this article, Mr. Barnhill describes pitfalls in relying solely on the PDA for pile capacities, and also describes what PDA is good at and how it can be used successfully. [/Editor]

Last Updated on Tuesday, 01 March 2011 22:51
 
We must not sell ourselves short: Engineering is an honorable profession PDF Print E-mail
Articles - Miscellaneous
Written by Bill Siegel, Kleinfelder CEO   
Sunday, 20 June 2010 23:55

Kleinfelder CEO Bill Siegel

[Editor] Do we as geotechnical engineers and engineering geologists realize the impact of what it is that we do in our professions? Kleinfelder CEO Bill Siegel thinks we need to step back once and a while and look at the significance of our work. In this article contributed to GeoPrac.net, Mr. Siegel describes his observations at more than 50 Kleinfelder offices in this regard. I think I for one will have to work at taking his advice. Click through for Mr. Siegel's excellent article. [/Editor]

Last Updated on Tuesday, 13 July 2010 11:55
 
Geofoam Offers Performance and Efficiency, Streamlining Nebraska Traffic PDF Print E-mail
Articles - Miscellaneous
Written by Nico Sutmoller   
Tuesday, 25 August 2009 13:00

Geofoam used on Pacific Street Bridge Project in Omaha, Nebraska[Editor] Geofoam is a great tool to have in your geotechnical toolbox. It can be used to reduce vertical loads to control settlement or to reduce lateral loads on bridge abutments or other structures. The Pacific Street Bridge Project in Omaha, Nebraska is one project that used geofoam for both of these purposes. In this article, author Nico Sutmoller, Geofoam Specialist with Insulfoam, LLC describes this excellent case study in the application of geofoam to meet the project objectives and provide aditional efficiencies during the construction phase. Nico, thanks for sharing with us! [/Editor]

Last Updated on Tuesday, 25 August 2009 14:27
 
VBA and Excel for Engineers and Scientists – Part 3 PDF Print E-mail
Articles - Software and Spreadsheets
Written by Randy Post   
Wednesday, 10 June 2009 01:23

Monte Carlo Simulation in Excel using VBAIn this third and final installment of the popular VBA and Excel for Engineers and Scientists series, we will look at one of the most important techniques for extending Excel with VBA, the Range Object. I'll show you the best way to refer to single cells, multiple cells, how to get values from them and put values back into ranges using the VBA. And we'll program up a simple Monte Carlo Simulation example and lastly we'll look at how to read and write to text files and to manipulate files and folders in Windows.

Last Updated on Wednesday, 10 June 2009 01:47
 
Variable Colours for Reports in gINT Part 1 PDF Print E-mail
Articles - Software and Spreadsheets
Written by Miles Davis   
Thursday, 30 April 2009 13:28

gINT colors[Editor] Miles Davis of Quantum Geotechnical Ltd. and gINTDev gives us a sneak peak at a "future feature" in gINT. Of course, gINT Software is a Premier Sponsor of GeoPrac, and the article has been published with the complete knowledge of the company. We welcome this first contribution from Miles and look forward to Part 2 and future articles sharing his gINT expertise! [/Editor]

Last Updated on Thursday, 30 April 2009 13:33
 
Side Hill Retaining Walls - Part 2 PDF Print E-mail
Articles - Retaining Walls
Written by Randy Post   
Thursday, 02 April 2009 12:32

Completed side-hill retaining wall for the SR 264 Second Mesa project in Arizona. Photo by Bharat Khandel, ADOT by way of NCS Consultants, LLCIn this part 2 of 2, various types of retaining walls are examined as possible alternatives in a side-hill retaining wall situation. These include conventional wall types such as CIP walls, MSE walls, gravity walls and soldier pile walls and some less conventional approaches such as lighweight concrete fill, hybrid soil-nail and geofoam wall systems, ground improvement and micropile walls.

Part 1 of this Side Hill Retaining Wall article covered the definition, significance, problems and failure modes, investigation techniques, analysis, and construction considerations of side hill walls. A PDF version is now available for download as well. Click through for the article and the download link!

Last Updated on Thursday, 02 April 2009 13:30
 
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