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Video of Highway 101 Landslide in California
Looks like the Facebook video gets cropped when I embedded it here. You ca
San Francisco Millennium Tower Has Settled 16 Inches
Misrepresents actual foundation geometry. Photos show deep excavation to ne
New FHWA Soil Nail Manual Addresses LRFD, Hollow Bars
Good evening from Barcelona, Spain. I am witting to you because of I am le
Engineering Geologists vs Geological Engineers vs Geotechnic
Geological engineer from Spain (looking for job smiley geoengineer.martin@gmail
Content
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Selected IFCEE 2015 Articles Free for Limited Time PDF Print E-mail
Written by Randy Post   
Monday, 27 July 2015 01:00

IFCEE 2015 LogoThe 2015 International Foundation Congress and Equipment Expo was held in San Antonio back in March of this year.  The proceedings from IFCEE 2015 are now available online and for purchase at the ASCE Library.  However, they are offering a selection of papers for free for a limited time, you just need to be registered with ASCE Library. You can register for free to get access if you haven’t already.

Last Updated on Saturday, 25 July 2015 07:47
 
Site Characterization Services: Step 1 Data Mining PDF Print E-mail
Written by Randy Post   
Thursday, 16 July 2015 23:33

A nice video from Terracon on the first step for a geotechnical engineering investigation. [Source: Terracon YouTube Channel. Image: YouTube]

Last Updated on Friday, 17 July 2015 06:34
 
New DeWind One-Pass Trencher–World’s Largest! PDF Print E-mail
Written by Randy Post   
Monday, 13 July 2015 06:31

This slide courtesy of DeWind pretty much says it all!

dewind-mt3500-largest-deep-onepass-trencher-in-the-world-1-638

Last Updated on Monday, 13 July 2015 06:32
 
2015 Seed Lecture - Peter Robertson on Liquefaction PDF Print E-mail
Written by Randy Post   
Tuesday, 23 June 2015 22:49

Peter K. Robertson, Ph.D., P.Eng, Professor Emeritus, University of Alberta, Technical Advisor, Gregg Drilling & Testing Inc. is the 2015 recipient of the H. Bolton Seed Medal for outstanding contributions to teaching, research, or practice in geotechnical engineering. He presented his keynote lecture at the 2015 IFCEE Conference in San Antonio. The title of the presentation was Evaluation of Soil Liquefaction - How Far Have We Come in the Past 30 Years?

[Source: Don't forget to Subscribe to the Geo-Institute YouTube Channel. Image: YouTube]

Last Updated on Wednesday, 24 June 2015 05:53
 
Transitioning from Geotechnical Consulting to Contracting | 2015-04-28 | National Driller PDF Print E-mail
Written by Randy Post   
Sunday, 14 June 2015 16:06
Kord Wissman, President of Geopier Foundation Company

National Driller magazine had a nice article not to long ago interviewing Kord Wissman about his transition from consulting to contracting. Kord is the President of Geopier Foundation Company (owned by Tensar). He has some very interesting insights, it's worth the read. I admire Kord as well for his involvement with the Geo-Institute and the GBA, he is very generous with his time and talents, more of us should be like him! I think GBA members can listen to his 'Going to the Dark Side' presentation (which was the impetus for the interview) for free, check the GBA website. [Source: Read the interview at National Driller. Image: National Driller]

 
Geo-Institute Launches New Website PDF Print E-mail
Written by Randy Post   
Tuesday, 09 June 2015 22:41

New Geo-Institute Website

From the G-I eUpdate Newsletter:

The Geo-Institute is proud to announce the launch of its new website! With the same URL as before, www.geoinstitute.org, the website strives to support and communicate the value and dynamism of the geoprofession, preserve its integrity, and foster its growth.

Our easy-to-use website features efficient navigation and search, making our most popular and newest content easy to find. The appealing, new design allows GEOSTRATA articles to be easily accessed and indexed by subject.

The G-I website also hosts autonomously maintained "microsites" for committees and chapters; this allows all the individual websites to be located in one place and fosters communication within the G-I community.

The website looks great. Yours truly served on a task force to provide input on selecting a consultant and various design features. I know it will be a tremendous resource for our profession for many years! [Source: Visit the Updated Geo-Institute Website via G-I eUpdate Newsletter. Image: G-I via ShrinkTheWeb]

Last Updated on Wednesday, 10 June 2015 05:45
 
Residential Foundation Investigation Standards PDF Print E-mail
Written by Randy Post   
Sunday, 31 May 2015 15:49
Typical residential foundation settlement profile

Bob Brown with Arizona Foundation Repair, a foundation repair contractor, has a nice blog post about the need for better standards for forensic investigations for residential foundation investigations. He points to some standards by a group called the Foundation Performance Association. Check it out if you are involved in residential foundation repair or forensic investigations. [Source: Arizona Foundation Repair. Image: Foundation Performance Association]

 
2015 Tunneling Industry Forecast PDF Print E-mail
Written by Randy Post   
Thursday, 30 April 2015 15:19

What will 2015 hold for the tunneling industry? Tunnel Business Magazine asked a panel of 4 industry experts that question. The panel consisted of a Colorado School of Mines Professor as well as reps from Black and Veatch, AECOM, and Kenall Manufacturing. In general they seem to agree that there are opportunities in the US for large combined sewer outfall (CSO) projects, water distribution projects, and even high-speed rail, particularly in California. [Source: Check out all of the analysis at Tunnel Business Magazine]

 
The van that goes looking for potholes PDF Print E-mail
Written by Randy Post   
Thursday, 16 April 2015 23:28
High-tech pothole-seeking van from Northeastern University

A team from Northeastern University has a very interesting van used for quantitatively assessing pavement condition using a variety of sensors. They use cameras, laser profilers, accelerometers on axles, pressure sensors in the tires, microphones, and even ground penetrating radar. The researchers reportedly characterized pavement condition of 150 miles of road in 4 days in Beverly, Massachussets, a task that took public employees about 1 year the last time it was performed, in 2010. The cost of the survey was around $25,000. The technology is expected to be commercialized this month. [Source: The Boston Globe. Image: Boston Globe]

 
New FHWA Soil Nail Manual Addresses LRFD, Hollow Bars PDF Print E-mail
Written by Randy Post   
Sunday, 12 April 2015 22:05

GEC7_2015_coverSince March of 2003, the FHWA’s Geotechnical Engineering Circular Number 7 (GEC No. 7) has been the standard reference document for design and construction of soil nail retaining walls in roadway applications, and really in all applications. The FHWA has released an updated version of this manual as of February of 2015.  This new version is still called GEC No. 7, but now titled “Soil Nail Walls Reference Manual.”  You can download the document from the FHWA’s Geotechnical Engineering website.

I am still in the process of working through the manual, but one of the major changes is the addition of the implementation of the Load and Resistance Factor Design (LRFD) platform. This will have an implication on all future soil nail walls for roadway projects.

The manual also appears to have removed example problems solved using SNAILZ software (by CalTrans) in favor of the FHWA’s own Soil Nail Analysis Program (SNAP) 2 software. I guess we’re going to have to get familiar with that software as well.  I’m strongly considering looking into SNAIL Plus by DeepExcav, a commercial product.  I’ve seen demos before, and have been very impressed.

Finally, I was very curious to see what they would say about hollow bar soil nails.  They review some of the work done in the last 5 years or so done by the FHWA and ADSC.  If I understood correctly, it appears that they are saying that because of the uncertainties regarding damage to corrosion protection during installation, they are still not recommending hollow bar nails for roadway applications, except if the ground conditions are non-aggressive and if you use sacrificial steel.  I suppose that at least opens the door to this technology for collapsing ground situations.  

Last Updated on Tuesday, 14 April 2015 05:54
 
How to Use Thermal Integrity Profiling to Assess Soil Nail Integrity PDF Print E-mail
Written by Randy Post   
Wednesday, 18 February 2015 22:43
Using thermal integrity profiling on soil nails

National Driller magazine recently republished a paper by authors from GRL Engineers Inc. and Pile Dynamics Inc. (PDI) describing a demonstration project for the Texas Department of Transportation involving thermal integrity profiling (TIP) of soil nails. TIP involves using the thermal energy created by curing concrete to determine the shape of a grout or concrete body and the position of reinforcement within a grouted or concreted hole. It has been used successfully for QC of drilled shafts and auger cast piles. It can be performed in open access ports by lowering a thermal probe down the hole, or by attaching thermal wire cables to the reinforcement with sensors spaced every 6 inches. This study used the thermal wire cables attached to two soil nail bars grouted into 6 inch diameter holes. The first nail had no deliberate defects, the second had two intentional soil inclusions attached to the bar prior to grouting. The TIP successfully identified the anomalies and it appears that the method shows potential for QC of the shape and diameter of a grout body around a soil nail. [Source: Read the article at National Driller. Image: National Driller]

 
Video: AutoCAD Geology Solids and Civil 3D PDF Print E-mail
Written by Randy Post   
Wednesday, 28 January 2015 23:20

GeoPrac sponsor Keynetix has released a video tutorial on how to create geology solids in AutoCAD using Civil 3D. This is a new and improved technique using the Civil 3D productivity pack 1. [Source: Keynetix YouTube Channel. Image: YouTube]

Last Updated on Thursday, 29 January 2015 06:27
 
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