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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
A Whole Lotta Shakin' Goin' On: Center for Geotechnical Mode
Randy, While the UC Davis lab is impressive I believe the USACE Centrifuge
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California unveils $24 billion, 40-year water tunnel plan PDF Print E-mail
Written by Randy Post   
Wednesday, 26 September 2012 14:59
California Governor Jerry Brown unveils a multi-billion dollar water supply tunnel plan

California Governor Jerry Brown announced this summer that the state will move forward with plans for two multi-billion dollar water supply tunnels. Twin 56-km long (35 miles) tunnels will be constructed to convey water from the Sacramento River south to an existing aqueduct that serves the San Joaquin Valley and Southern California. [Source: World Tunnelling. Image: Rich Pedroncelli via KTVU.com]

 
Shannon & Wilson Rocks on LA's 'Levitated Mass' Art Project PDF Print E-mail
Written by Randy Post   
Sunday, 23 September 2012 14:04

Levitated Mass sculpture by Michael Heizer at the LACMA

Geotechnical consulting firm Shannon and Wilson based in Seattle, Washington was involved in the foundation engineering for a 360 ton sculpture by Michael Heizer at the Los Angeles County Museum of Art (LACMA). The giant granite boulder sits over a depressed ramp to the La Brea Tar Pits. The sculpture is entitled 'Levitated Mass'. I'm reminded of a quote by Richard L. Handy:

Virtually every structure is supported by soil or rock. Those that aren't either fly, float, or fall over.

[Source: PR.com. Image: LA Observed]

 

Last Updated on Sunday, 23 September 2012 21:28
 
Blasting for NY subway construction showers street with debris PDF Print E-mail
Written by Randy Post   
Thursday, 06 September 2012 23:26
A worker surveys the damage from a blast gone wrong for the Second Ave. Tunnel Project

Blasting for the New York MTA's Second Avenue Subway project unexpectedly showered the street level with debris, damaging buildings. Fortunately there were no injuries. Some debris reached the height of a 5 story building. [Source: WSJ.com via ASCE SmartBrief. Image: WSJ.com]

 
Caldecott Tunnel fourth bore nears end of big dig PDF Print E-mail
Written by Randy Post   
Tuesday, 21 August 2012 23:31
A roadheader inside the Caldecott Fourth Bore Tunnel

The 2-year process of excavating the 3,389 foot long fourth bore of CALTRANS' Caldecott Tunnel is nearly complete. The tunnel is anticipated to be put into service in 2013 to help relieve a major traffic bottleneck in the San Francisco Bay area. [Source: ContraCostaTimes.com via ASCE SmartBrief. Image: Karl Mondon / San Jose Mercury]

 
Crossrail - the engineering geology PDF Print E-mail
Written by Randy Post   
Tuesday, 21 August 2012 23:31
One of the eight Crossrail Tunnel Boring Machines or TBMs

For those outside the UK, the Crossrail project is a mega-project upgrade to the London metro area's subway system. The tunneling portion of the project will consist of 21-km of twin-bore tunnels excavated by eight closed-faced tunnel boring machines, six of which will be earth pressure balance machines (EPBMs). The UK's Geological Society has published an interesting article on the geology of the crossrail project. Some of the geological and geotechnical challenges of the project include the famous London Clay, sensitive structures, faults, and rapid transitions between permeable and relatively impermeable formations creating potential water pressure issues. [Source: Geological Society. Image: Geological Society]

 
Launch Pit Retaining Walls Completed for SR 99 Tunnel in Seattle PDF Print E-mail
Written by Randy Post   
Monday, 06 August 2012 00:56
Malcolm Drilling prepares to drill secant pile drilled shafts for SR 99 TBM launch pit.

Drilled shafts have been installed by Malcolm Drilling to form the secant pile retaining walls to support the 400 ft x 80 ft x 80 ft launch pit for the SR 99 tunnel boring machine on the Alaskan Way Viaduct Tunnel Replacement Project in Seattle. Excavation has commenced on the pit in preparation for the launch of a world record 57.5-ft diameter TBM (until Russia launches a planned 63-ft TBM). The Seattle Times article indicates there are a total of 1400 drilled shafts in the pit walls and nearby, but a press release by WSDOT indicates the walls are comprised of approximately 200 drilled shafts. [Source: Seattle Times via ASCE SmartBrief. Image: WSDOT Flickr]

 
$22M in Geotechnical Work complete for new Tappan Zee Bridge PDF Print E-mail
Written by Randy Post   
Monday, 30 July 2012 05:50
Existing Teppan Zee Bridge

70 boreholes were completed as well as 7 load test piles to characterize the geotechnical conditions for this well known bridge spanning the Hudson River in New York. No significant surprises were encountered compared to geotechnical recommendations in a draft environmental assessment report for the project according to the project manager for the State. [Source: LoHud.com via ASCE SmartBrief. Image: Wikipedia]

 
Port of Miami Tunnel grouting work by Nicholson Construction PDF Print E-mail
Written by Randy Post   
Monday, 23 July 2012 05:29
Nicholson's grouting flotilla at the Port of Miami Tunnel Project

GeoPrac sponsor Nicholson Construction is working on one of the most challenging grouting jobs in the world right now. They are performing grouting in porous limestone formations under the shipping channel in Miami's Biscayne Bay as part of the Port of Miami Tunnel project. This grouting work was the featured article in the June 2012 issue of Tunnel Boring Magazine (Here is a link to the story in PDF format). They are being called to perform the work both onshore and offshore to depths up to 126 feet below grade, including inclined holes up to 146 feet deep. Environmental regulations are abig consideration, but even that pales in comparison to the logistical challenges of not impacting cruise ship traffic in the port. Make sure you read about this interesting grouting and tunneling project. [Source: Tunnel Business Online. Image: Tunnel Boring Magazine]

 
Maccaferri wins International Ground Engineering Award PDF Print E-mail
Written by Randy Post   
Wednesday, 18 July 2012 15:02
Maccaferri Wins Ground Engineering Award

The Pakyong Airport in Himalayan state of Sikkim in North East India was selected as the 2012 International Project of the Year by Ground Engineering Magazine, a geotechnical engineering trade publication associated with the UK's New Civil Engineer organization. The highlight of the challenging Rup2560 M (£31M, US$48M) project is a series of geogrid reinforced slopes up to 74 m (243 feet) high. Maccaferri’s Terramesh, Green Terramesh and Paralink soil reinforcement products were used extensively on the project. Mott Macdonald India was the main designer, and Punj Lloyd of Dehli was the contractor. Maccaferri Environmental Solutions Pvt Ltd was the division of Maccaferri responsible for the reinforced soil works. [Source: geosynthetica.net. Image: Geosynthetica]

 
Nicholson Provides Micropiles for Hershey Park Storm Runner Rollercoaster PDF Print E-mail
Written by Randy Post   
Tuesday, 19 June 2012 16:32
Nicholson designed and constructed micropile foundations for Hershey Park's Storm Runner rollercoaster

Hersheypark is a famous amusement park in Hershey, Pennsylvania. The park looked to GeoPrac sponsor Nicholson Construction for micropile foundations for their new $12.5M Storm Runner roller coaster. The ground conditions consisted of highly variable karstic limestone. Read the project profile on Nicholson's website to see how they handled the design and construction of these micropile foundations. [Source: Nicholson Construction Company. Image: Nicholson Construction]

 
URETEK ICR restores concrete, but your golf game?!?! PDF Print E-mail
Written by Ty Taylor   
Wednesday, 13 June 2012 23:17

Leaky Pipe Causes Soggy Fairway

Sometimes you need a geotechnical pro more than a golf pro to improve your game.

As a golfer, mechanics are a vital part of how you play the game… however, soggy course conditions can affect your game just as much as your golf pro. Click through to see how URETEK alleviated soggy fairway conditions at a premiere course in Texas.

Last Updated on Wednesday, 13 June 2012 23:45
 
Michigan Contractor sues Richmond, KY Utilities, engineering firm over geotechnical report PDF Print E-mail
Written by Randy Post   
Monday, 11 June 2012 14:55

Lakeshore Engineering Services, Inc. of Detroit, MI has filed a lawsuit agains the Richmond (Kentucky) Utilites Board and HDR Engineering alleging breach of contract.

Among other claims, Lakeshore alleges Richmond Utilities committed a breach of contract and violated the Fairness in Construction Act. The company also claims both Richmond Utilities and HDR are guilty of negligent misrepresentations and supplying false information by stating in the contract that bidders could 'rely' on the information provided in the geotechnical report.

The claims center around bedrock encountered during the excavation for a wastewater treatment plant. The geotechnical report was not written by HDR, but by another engineering firm, Thelen Associates Inc. [Source: The Richmond Register]

 
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