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A Whole Lotta Shakin' Goin' On: Center for Geotechnical Mode
Randy, While the UC Davis lab is impressive I believe the USACE Centrifuge
Foundations and Geotechnical Engineering for the Burj Dubai
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Site Characterization Services: Step 1 Data Mining
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Available Resources
Rockfall: Characterization and Control PDF Print E-mail
Written by Randy Post   
Tuesday, 08 May 2012 14:36

TRB Rockfall Characterization and Control

This fall, TRB will release Rockfall: Characterization and Control, which will address rockfall hazard identification and evaluation, investigation process, mitigation options, and maintenance and management programs.

The 400 page publication will include a DVD with video clips of rockfall field tests and several historical movies documenting rockfall field activities.

Because of the expected high demand for this report, TRB is taking advance pre-publication orders. Shipping costs will be waived for all orders received prior to October 1, 2012. Click the link below for ordering info. [Source: TRB. Image: TRB]

Last Updated on Tuesday, 08 May 2012 21:42
Seismic Design of Geosynthetic-Reinforced Soil Bridge Abutments with Modular Block Facing PDF Print E-mail
Written by Randy Post   
Sunday, 29 April 2012 16:50
Seismic Design of Geosynthetic-Reinforced Soil Bridge Abutments with Modular Block Facing

Text from TRB: TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 187: Seismic Design of Geosynthetic-Reinforced Soil Bridge Abutments with Modular Block Facing explores design methods and construction guidelines for using geosynthetic-reinforced soil (GRS) systems in bridge abutments in seismically active regions. [Source: TRB. Image: TRB]

Practices and Procedures for Site-Specific Evaluations of Earthquake Ground Motions PDF Print E-mail
Written by Randy Post   
Thursday, 19 April 2012 14:41
NCHRP Synthesis 428 - Practices and Procedures for Site-Specific Evaluations of Earthquake Ground Motions

A new synthesis report by the NCHRP aims to identify the current state of the practice in site-specific earthquake design.

TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 428: Practices and Procedures for Site-Specific Evaluations of Earthquake Ground Motions identifies and describes current practice and available methods for evaluating the influence of local ground conditions on earthquake design ground motions on a site-specific basis. The report focuses on evaluating the response of soil deposits to strong ground shaking.
[Source: TRB/NCHRP. Image: TRB/NCHRP]

Giroud-Han Method for Geosynthetic-Reinforced Unpaved Roads PDF Print E-mail
Written by Randy Post   
Monday, 16 April 2012 00:13


A 2004 paper by J.P. Giroud and Jie Han provides a practical design method for geosynthetic-reinforced unpaved roads.  The method outlined in the paper was very detailed, and the authors wanted to provide a summary for the benefit of practitioners who wish to use the method.  Additionally, some equations in the paper are generic and some have been calibrated for specific geosynthetics (the Tensar BX1100 and BX1200 biaxial geogrids, with new work by another author applying to Tensar’s Triax geogrid) and some practitioners were not clear on this matter.  Finally, the authors stress the need for calibration of the method when using other geosynthetics.  These three issues were addressed by a 2-part series in Geosynthetics Magazine by Giroud and Han.  You can read the first part and the second part at [Image from Geosynthetics Magazine]

Last Updated on Monday, 16 April 2012 00:14
Video: xGEL LatMate Software for Geotechnical Lab Efficiency PDF Print E-mail
Written by Randy Post   
Sunday, 25 March 2012 23:20

Here is a video about a nifty software product I came across at the trade show, xGEL LabMate.  I enjoyed the chance to chat with Art Koenig, the president of GeoSmart Software about this software, and about all kinds of other things from daughters to careers, ASFE, running a business and much more.

xGEL LabMate software for geotechnical laboratories
Last Updated on Monday, 26 March 2012 23:44
ASFE Issues New Model Agreement for Construction Materials Engineering and Testing (CoMET) PDF Print E-mail
Written by Randy Post   
Thursday, 22 March 2012 16:52
Construction Materials Testing Services

ASFE/The Geoprofessional Business Association along with Terra Insurance company have released a model agreement for construction and materials testing services (CoMET). This document was created for use by ASFE member firms based on the organization's 40+ years of fulfilling their mission of helping 'geoprofessionals maximize their importance and value to the marketplace, achieve business excellence, and manage risk.' Make sure you have your own lawyer review the model agreement before using it. [Source: ASFE. Image: Gavel & Dorn Engineering]

Workers and geotechnical engineer run from 10,000 cu m landslide PDF Print E-mail
Written by Randy Post   
Thursday, 22 March 2012 16:38
Landslide in Waioeka Gorge in New Zealand

Construction or maintenance personnel and a geotechnical engineer narrowly avoided being a victim of a new landslide at the site of a landslide cleanup. They were attempting to clean up a landslide on the State Highway 2 in the Waioeka Gorge, New Zealand when spotters noticed the area becoming unstable. The workers were pulled back and had to 'run for it', but one worker was swept away by the slide while still in his excavator and two other excavators were partially engulfed. The man was able to safely get out of the cab of the excavator. [Source: Otago Daily Times Online News. Image: NewstalkZB]

Subsea Piling Frames - StabFRAME PDF Print E-mail
Written by Randy Post   
Tuesday, 06 March 2012 16:38

Subsea piling frame from LDD

A new piece of equipment for deep ocean pile driving was recently used in 140m of water off the coast of Brazil. The StabFRAME is lowered to the sea floor and leveled to allow accurate driving of piles into the sea floor. See the video below for an example. More on the Brazil Project at the NCE link. [Source: Large Diameter Drill via NCE. Image: LDD]


Last Updated on Tuesday, 06 March 2012 23:41
Koerner on the publication of Designing With Geosynthetics, 6th Ed. PDF Print E-mail
Written by Randy Post   
Thursday, 23 February 2012 00:31
Koerner, Designing with Geosynthetics 6th Edition

Dr. Robert M. Koerner has recently published the 6th edition of his industry standard text, Designing With Geosynthetics. He changed to a small publishing company to bring down the price, and the result is a two volume set, each costing $35 for hardcover or $25 for soft cover. The eBook format is only $4 for each. Order through Xlibris. [Source: Image: XLibris]

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: Image: AP File Photo/Mark Was via]

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