April 2008 Issue

• Taking issue with recommendations

  The “Kam Kotia Project Case Study” in the February/March 2008 issue of Geosynthetics magazine starts off with interesting descriptions of the project design, geosynthetic testing, and construction.

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  GeoAmericas-2008 and GRI-21 proceedings now available

  All of the educational tracks from GeoAmericas- 2008 in Cancún are now available on CD: 238 papers from 44 technical sessions, more than 2,100 pages!

• Marr named to Academy of Engineering

  W. Allen Marr, Ph.D, P.E., and president of Geocomp Corp., has been named to National Academy of Engineering.

• Sprague honored for technical paper

  C. Joel Sprague of Greenville, S.C., won the 2008 Most Distinguished Technical Paper Award from the International Erosion Control Association (IECA) earlier this year.

• Growing use for geosynthetics: "living walls"

  With the recent explosion of eco-awareness, demand is growing for a new geosynthetic-dependent product: living walls.

• Peter Kesser named president at Stevens

  JPS Industries Inc. announced earlier this year that Peter A. Kesser was named president of Stevens Roofing and Geomembrane Systems.

• New manager at Cooley

  The Cooley Group has named Don Nelligan regional sales manager for the northeastern United States and eastern Canada.

• Promotions at Weldmaster

  Miller Weldmaster Corp., Navarre, Ohio, has promoted Jeffrey N. Dimos and Jeffrey P. Sponseller to executive vice president positions.

• Hayward Baker opens new office in Twin Cities

  Hayward Baker Inc. geotechnical contractor has opened a new sales, project management, and engineering services office in the Twin Cities.

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  GeoAmericas 2008: Show wrap-up

  Doing business at GeoAmericas-2008, the exhibit hall was very energetic.

• TenCate wins Telly

  TenCate Geosynthetics North America won a 2007 Telly award for its “Mirafi Road Show” video presentation.

• Review and analysis of GRI-21 Conference

  Our 21st annual GRI conference went off without a hitch in Cancun, Mexico on March 5, 2008.

• Request-for-Proposals

  he Geosynthetic Institute (GSI) is delighted to announce a worldwide call for requests-for-proposals (RFPs) focusing on innovative geosynthetics research and development projects.

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  Three challenges in using SRWs and other reinforced-soil structures: Part 2B

  Proper integration of the MSE wall/slope design into the overall site design requires the owner to communicate with, and effectively manage, three overlapping engineering disciplines.

• Classifying geotextiles

  All state DOTs have Web sites where you can look up these specs and their details.

• Pipeless drainage system

  With a geotextile filter over the system–having a pipe or not–there is a chance for excessive clogging, particularly with the upstream soil you describe.

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  Geomembrane sealing systems for dams

  The 2006 ICOLD Bulletin on Geomembrane Sealing System for Dams supersedes and greatly expands upon two earlier versions, published in 1981 and 1991.

• Geomembrane thickness

  Regarding HDPE geomembranes, the minimum thickness required by the U.S. Environmental Protection Agency is 1.5mm.

• Geomembrane sealant to concrete pad

  Geomembrane anchorage to concrete surfaces is generally accomplished by inserting steel anchor bolts into the concrete with a thick neoprene or cushioning strip between the concrete surface and the geomembrane.

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  Repairing Yi-Lan-I Road in Taiwan

  During a particularly rainy 75-day period (mid-July through September 2005), the region experienced abundant rainfall in the wake of 7 powerful typhoons.

• GCLs and slope stability

  Of course, there are ongoing tests on GCLs constantly, but the focus is on the upper and lower interface shear tests and somewhat less with respect to internal shear strengths.

• 

  A forensic hypothetical: The case of the percolating water

  Nearly every SRW system in the market has experienced some sort of failure.

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• 

  Repairing Yi-Lan-I Road in Taiwan

  During a particularly rainy 75-day period (mid-July through September 2005), the region experienced abundant rainfall in the wake of 7 powerful typhoons.

• 

  Three challenges in using SRWs and other reinforced-soil structures: Part 2B

  Proper integration of the MSE wall/slope design into the overall site design requires the owner to communicate with, and effectively manage, three overlapping engineering disciplines.

Back to Top

• Pipeless drainage system

  With a geotextile filter over the system–having a pipe or not–there is a chance for excessive clogging, particularly with the upstream soil you describe.

• Strength testing

  There are no generic standards or specifications for the situation you describe.

• 

  A forensic hypothetical: The case of the percolating water

  Nearly every SRW system in the market has experienced some sort of failure.

• 

  The GRS bridges of Defiance County

  Three years ago, the Federal Highway Administration (FHWA) teamed up with local officials in Defiance County, Ohio, to test a new prototype geosynthetic-reinforced soil (GRS) integrated bridge system.

• Geomembrane thickness

  Regarding HDPE geomembranes, the minimum thickness required by the U.S. Environmental Protection Agency is 1.5mm.

• GRI Standards

  We have developed and published about 100 GRI Standards since 1985.

• Classifying geotextiles

  All state DOTs have Web sites where you can look up these specs and their details.

• Slack calculations

  The subject of calculating slack in geomembranes for the purpose of backfilling, and then having the lower backfilled temperature bring the GM back into a nonwrinkled condition, is something I am not proud of at this time.

Back to Top

• Geomembrane thickness

  Regarding HDPE geomembranes, the minimum thickness required by the U.S. Environmental Protection Agency is 1.5mm.

• GRI Standards

  We have developed and published about 100 GRI Standards since 1985.

• Classifying geotextiles

  All state DOTs have Web sites where you can look up these specs and their details.

• Slack calculations

  The subject of calculating slack in geomembranes for the purpose of backfilling, and then having the lower backfilled temperature bring the GM back into a nonwrinkled condition, is something I am not proud of at this time.

• Pipeless drainage system

  With a geotextile filter over the system–having a pipe or not–there is a chance for excessive clogging, particularly with the upstream soil you describe.

• GCLs and slope stability

  Of course, there are ongoing tests on GCLs constantly, but the focus is on the upper and lower interface shear tests and somewhat less with respect to internal shear strengths.

• Strength testing

  There are no generic standards or specifications for the situation you describe.

• Geomembrane sealant to concrete pad

  Geomembrane anchorage to concrete surfaces is generally accomplished by inserting steel anchor bolts into the concrete with a thick neoprene or cushioning strip between the concrete surface and the geomembrane.

Back to Top