Crimping prefabricated vertical drains

October 1, 2023  |  Q&A: GMA Techline

Q: Can you enlighten me of any work related to the crimping of prefabricated vertical drains (PVD) as a result of soil consolidation and settlement of harbor sludge or dredge spoil? We are anticipating 3 feet (1 m) of settlement in 30 feet (10 m) of sediment (sludge/spoil).
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Geotextiles traceability

October 1, 2023  |  Q&A: GMA Techline

Q: We are having a problem with traceability on our project with geotextiles. Does this really matter for each roll and lot of material?
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Septic system drain fields

October 1, 2023  |  Q&A: GMA Techline

Q: Should I sock the perforated pipe of my septic system drain field and eliminate the gravel rock/bedding around the pipe?
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Service life of exposed geosynthetics

October 1, 2023  |  Q&A: GMA Techline

Q: Can we correlate laboratory versus outdoor weathering of geomembranes? I would appreciate your thoughts on this matter because we are getting technical challenges on this issue from regulators.
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Improving geosynthetics shipping

October 1, 2023  |  Q&A: GMA Techline

Q: We are having delivery problems this year and shipping has gotten much more expensive. Can you suggest how we can improve the situation?
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Geotextile characteristics

October 1, 2023  |  Q&A: GMA Techline

Q: I have two nonwoven heat-bonded geotextile filters: one made of polyester and the other made of polypropylene. They look the same but are giving very different hydraulic performance. Can you explain this phenomenon?
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LLDPE yield point

October 1, 2023  |  Q&A: GMA Techline

Q: Can you tell me why my linear low-density polyethylene (LLDPE) is currently showing a yield point? In years past, we have not seen this happen.  
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Four Pillars Of Geosynthetic Sustainability

August 1, 2023  |  Q&A: GMA Techline

Q: How is geosynthetic sustainability as compared with conventional construction materials like soil, concrete and steel?
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Bridging or trampolining during liner installation

August 1, 2023  |  Q&A: GMA Techline

Q: Why is it required that there be no bridging or trampolining during liner installation at any temperature?
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Equipment on deployed geosynthetics

August 1, 2023  |  Q&A: GMA Techline

Q: I’m hoping you can resolve a disagreement among coworkers regarding construction quality assurance (CQA). I’m asking what is published and/or your opinion. It involves traffic on geomembrane. Is it now industry standard to allow skid steers and/or ATVs to operate directly on a geomembrane? It…
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