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Friday, 08 May 2015

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Edward Alexander (Ed) Nowatzki: 1936-2015 

GeoPrac.net [2015-05-08 17:54:39]  recommend  recommend this post  (37 visits) info

 US
It is with great sadness that I report the passing of a mentor and former colleague, Dr. Ed Nowatzki, PE, PhD, D.GE, F. ASCE.  His obituary can be found here.  I first met Ed when I took his foundation engineering class at the University of Arizona.  Ed was a fantastic professor, and his consulting experience really informed his lecturing making his course the best and most practical geotechnical class I had in school.  I was privileged to work with Ed for several years [...]

Huge Undersea Landslide Caused Tsunami in Great Britain, Norway 

GeoPrac.net [2015-05-08 10:54:13]  recommend  recommend this post  (25 visits) info
The largest known undersea landslide occurred over 8,000 years ago off the coast of Norway. The volume of material that moved is mind-blowing, over 4.6 X 1012 cubic yards or 850 cubic miles! Known as the Storegga landslide, the resulting tsunami buried neolithic settlements in Norway with sediment and caused wave runnup in Great Britain that was 80 feet higher than the normal high tide. The devastating loss of human life can only be imagined. Regarding that last question, anthropologists [...]

Nortex and TerraThane Stabilize Houston Area Highways 

GeoPrac.net [2015-05-01 16:23:49]  recommend  recommend this post  (74 visits) info

 US
Houston’s Highways, Some of Busiest in Nation, Use Innovative TerraThane Polyurethane Foam Technology to Repair Bad Bridge Approaches, Uneven Joints, and Roadway Depressions. MOUNT AIRY, NC—Highways around Houston, TX, known as one the nation’s worst cities for traffic behind Los Angeles, D.C., and Atlanta, need constant repair, but can’t be closed while the work is done. Nortex Concrete Lift and Stabilization, Inc., a Ft. Worth, TX company, recently completed a [...]

Fugro Completes Major Offshore Geotechnical Investigation 

GeoPrac.net [2015-05-01 00:27:15]  recommend  recommend this post  (38 visits) info

 GB,KM
Fugro has completed one of the largest offshore geotechnical investigations in history according to Hydro-International.com. The investigation was performed by two vessels, MV Greatship Manisha and MV Bucentaur (pictured here), for DONG Energy's 1.2 gigawatt Hornsea Project One project which is located 120 km off the UK's Yorkshire coast. The investigation (contract valued at GBP13 million) consisted of 2,800 metres of seabed cone penetration testing and more than 5,000 metres of boreholes [...]

2015 Tunneling Industry Forecast 

GeoPrac.net [2015-05-01 00:19:34]  recommend  recommend this post  (24 visits) info

 US
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 [...]

The van that goes looking for potholes 

GeoPrac.net [2015-04-17 08:28:20]  recommend  recommend this post  (18 visits) info

 US
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 [...]

Ohio Highway Closed by House-Sided Boulder 

GeoPrac.net [2015-04-17 08:16:43]  recommend  recommend this post  (23 visits) info

 US
Not too much to say about this, but check out the photo. The entire westbound portion of US Highway 52 near the Ohio River was closed last week as a house-sized boulder and other rockfall debris landed on the roadway. Crews anticipated it would take several days to clear the material and reopen the road. [Source: WLWT News via USGS Landslide Events. Image: Kentucky Transportation Cabinet via

Introducing the LS™250 MiniSonic™, a Versatile Compact Sonic Rig 

GeoPrac.net [2015-04-14 14:49:42]  recommend  recommend this post  (29 visits) info

 US
SALT LAKE CITY, April 13, 2015 /PRNewswire/ -- Boart Longyear (www.BoartLongyear.com), the world's leading provider of integrated drilling services and drilling products, is proud to introduce the LS™250 MiniSonic™, a compact rig suitable for a wide variety of environmental, geotechnical, water and mining projects. Capable of drilling to depths of up to 250 feet (78m) when used with 4.75 inch (121mm) casing, the wide 600mm rubber tracks provide low ground pressure (.28 bar/4psi) [...]

New FHWA Soil Nail Manual Addresses LRFD, Hollow Bars 

GeoPrac.net [2015-04-13 07:05:55]  recommend  recommend this post  (5 visits) info

 US,MX
Since 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 [...]

Major Slope Failure at Yeager Airport in West Virginia 

GeoPrac.net [2015-03-16 13:29:45]  recommend  recommend this post  (38 visits) info

 US,
There was a significant slope failure at the Yeager Airport near Charleston, West Virginia last week. A 2005 project to create an Engineered Material Arresting System (EMAS) at the end of the runway required a massive reinforced soil structure fill slope over 200 feet high since the airport was constructed on top of a hill. According to a presentation published by the geogrid manufacturer, this project was the tallest known geosynthetic reinforced 1:1 fill slope in North America (as of 2010). [...]

Geosystems President Donald Bruce Shares Thoughts on Industry, Terzaghi Lecture 

GeoPrac.net [2015-03-16 06:18:40]  recommend  recommend this post  (14 visits) info

 US
National Driller has a nice interview with the 2015 Terzaghi Lecturer, Donald Bruce, President of Geosystems. Bruce, best known for his expertise in grouting, will deliver his Terzaghi Lecture at this week's IFCEE conference in San Antonio. [Source: Read the interview at National Driller. Image: National

Doha metro geotechnical work on track 

GeoPrac.net [2015-03-16 06:17:27]  recommend  recommend this post  (25 visits) info

 QA,KM
Advanced Construction Technology Services (ACTS) has contracts for geotechnical work for 3 lines of the proposed subway in Doha, Qatar. They have completed investigations for approximately 95 km of line and 51 stations and are currently working on the recommendations for track designers. The contract for the these services is worth approximately $1.37 million. [Source: Trade Arabia. Image: Trade

Aquadata - A Web Based Water Quality Public Portal 

GeoPrac.net [2015-02-19 13:55:31]  recommend  recommend this post  (26 visits) info

 AU
EarthScience Information Systems (ESCIS) is pleased to announce the release of the Shoalhaven City Council Aqua Data website, a branding of the ESdat Public Portal. Aqua Data is a web-portal providing greatly enhanced community access to the results of water quality monitoring completed by Shoalhaven City Council (SCC). Aqua Data is the public interface of a detailed system designed to streamline the way SCC manage and share environmental data. Aqua Data is accessed via a link on the [...]

Bertha TBM Begins Moving 

GeoPrac.net [2015-02-19 06:44:17]  recommend  recommend this post  (18 visits) info

 US
WSDOT reported that Bertha has slowly began moving again. It must tunnel through 20 feet of unreinforced concrete with its broken seal to break through into the rescue shaft. Once that happens, the repairs to her cutterhead can commence. The Seattle Tunnel Partners predict Bertha will overheat, as she did before stopping for repairs. If that occurs, they will stop tunneling to wait for the machine to cool before continuing. STP crews also chipped away at a Bertha-sized cut-out in the [...]

How to Use Thermal Integrity Profiling to Assess Soil Nail Integrity 

GeoPrac.net [2015-02-19 06:43:24]  recommend  recommend this post  (13 visits) info

 US
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 [...]

Viaduct Inspections Show Settlement Problems Long Before Tunneling 

GeoPrac.net [2015-02-19 06:42:32]  recommend  recommend this post  (13 visits) info

 US,IN
The Alaskan Way Viaduct tunneling project was in the news late last year when settlement of the Viaduct was reported during the dewatering efforts for the Bertha TBM rescue shaft. A recent post by WSDOT makes it clear that the settlement of the viaduct has been a problem for many years before the start of construction. The most recent round of monitoring by WSDOT began in 2001 after the completion of repairs to the the Viaduct following the Nisqually Earthquake. By 2006, a total of 4 3/4 [...]

Latest Release of HoleBASE SI Transforms Laboratory Scheduling 

GeoPrac.net [2015-02-13 14:09:07]  recommend  recommend this post  (112 visits) info

 GB
Redditch 30th Jan 2015 - The new release of HoleBASE SI includes ‘scheduling tools’ that allow engineers to electronically schedule geotechnical or environmental testing. This major breakthrough is likely to transform the way consultants and laboratories communicate with each other over the coming months. The new improvements also provide a glimpse of how well integrated customers and laboratories can be with the first UK wide implementation of a web service connection to [...]

DFI Announces New Testing and Evaluation Committee Chair 

GeoPrac.net [2015-02-13 14:05:25]  recommend  recommend this post  (53 visits) info
Hawthorne, NJ (February 11, 2015): Gerald Verbeek, of Verbeek Management Services (VMS), has accepted the position of chair of DFI’s Testing and Evaluation Committee. Verbeek succeeds outgoing chair, Don Robertson of Applied Foundation Testing, who led the committee since 2013. In 2004, after 20 years in the oil and gas industry, Verbeek started VMS, a management consulting business. One of the firm’s activities is helping European companies with their business in North America. [...]

New Tapan Zee Bridge Cofferdams designed with DeepEx software 

GeoPrac.net [2015-02-13 06:55:22]  recommend  recommend this post  (31 visits) info

 US
The geotechnical software company Deep Excavation has a nice entry on their blog about the cofferdams for the Tapan Zee Bridge in New York. Geotechnical firm Siefert Associates used the DeepExcav software to design the cofferdams which are needed to create the pile cap for the new bridge piers. [Source: Read more about the design of these cofferdams at the Deep Excavation website.. Image: Siefert Associates via Deep

Bertha TBM Access Pit Excavation Complete 

GeoPrac.net [2015-02-09 07:08:45]  recommend  recommend this post  (30 visits) info

 US,IN
The excavation has been completed for the access shaft or rescue shaft that was needed to be able to remove the damaged cutterhead of the Bertha TBM on the Alaskan Way Viaduct Replacement project in Seattle. The target depth of 120 feet was reached on January 30. WSDOT reports that settlement levels have remained stable in the pit area after an earlier settlement issue. In addition to the project update on the WSDOT project page, there is an excellent article on the work done by Malcom [...]
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