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FS for anchor trench calculations?
June 1st, 2014
From the GMA Techline Do you have a recommendation for what Factor of Safety to apply to the allowable geomembrane force for anchor trench calculations? (Melanie | Colorado) Reply: Over the years my thoughts have changed from having a high FS for geomembranes in their anchor trenches to treating the situation very differently. The motivation […]
Geomembranes for pipes?
June 1st, 2014
From the GMA Techline I have been asked to wrap a proposed 30-in. circular/cylindrical sanitary sewer pipe (HDPE) with a geomembrane as a dual containment layer. Could I get some pointers as to what kind of geomembrane(material, thickness, etc.) can be used to achieve this task? Any other information, such as pros and cons, would […]
Geogrid reinforcing behind rigid concrete retaining walls
June 1st, 2014
From the GMA Techline I participated in the Bologna Symposium and I [was] very happy and honored to see you live. I read a [GMA Techline] answer published in Geosynthetics magazine (Oct./Nov. 2009, p. 58), “Geogrid use behind rigid concrete retaining walls.” You refer to the Japanese railroad system guideline to verify a more in-depth […]
HDPE liner panel orientation?
June 1st, 2014
From the GMA Techline I am reviewing a construction report where a landfill cell has HDPE one-sided texture laid about 45 degrees from the direction of steepest slope across approximately one-third of the sideslopes. I am looking for quantitative data on any testing done with this type of orientation or any opinions you may have […]
Geosynthetics included in water bill approved by U.S. Senate
May 22nd, 2014
Landmark ‘geosynthetics language’ is in WRRDA, now awaiting president’s signature With a bipartisan 91-7 vote Thursday afternoon, the U.S. Senate followed Tuesday’s lead by the House in passing the Water Resources Reform & Development Act (WRRDA). Geosynthetics language was included in the WRRDA Conference Report. And that Act crossed the first of three final hurdles […]
Landmark ‘geosynthetics language’ included in WRRDA bill
May 20th, 2014
Water measure passed U.S. House Tuesday, to Senate on Thursday. Geosynthetics language was included in the Conference Report for the Water Resources Reform & Development Act (WRRDA). And that Act crossed the first of three final hurdles Tuesday, May 20, 2014, when the U.S. House passed the measure with a final vote total of: 412 […]
Annual tribal transportation conference in Anchorage
May 19th, 2014
Technical assistance programs contribute to Sept. 22-25 event The 17th annual National Tribal Transportation Conference is in Anchorage, Alaska, Sept. 22-25 at the Hilton Anchorage Hotel. The conference is a national effort engaging all seven of the national Tribal Technical Assistance Program (TTAP) centers, as well as stakeholders from tribal, federal, state, and local communities. […]
Geosynthetics and infrastructure
May 15th, 2014
Whither the geosynthetic products, applications, and services? White House official says: The Obama administration will intensify its efforts to get Congress to pass legislation that pays for roads and bridge repair. Money for roads and bridges? New York—The latest example is his campaign urging Congress to immediately approve more funds for highway and bridge repairs. […]
Safe enough to drink
May 14th, 2014
A new geomembrane cover for an old water reservoir provides a long-term solution. By Jack Sine Introduction Last November, Newport Beach, Calif., completed a major water reservoir renovation project that it expects will solve the city’s decades-long water quality issues. The 22-acre Big Canyon Reservoir was originally constructed in 1958, with the plan that it […]
New IGS chapter to host geosynthetics conference
May 12th, 2014
Honduras 2014 in Tegucigalpa June 16-18 One of the newest chapters of the International Geosynthetics Society (IGS) is hosting Honduras 2014: The First Honduran National Conference on Geosynthetics, June 16-18. The event will be held in Tegucigalpa, Honduras, at the College of Civil Engineering. An exhibit show, technical sessions, and international speakers highlight this Spanish/English […]