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GSI’s Koerner to host webinar on the development of geosynthetic drainage, GMA members get discounted rates

Products | August 21, 2018 | By:

The Geosynthetic Institute (GSI) will sponsor a webinar entitled “Sand Drains-to-Wick Drains-to-Sand Columns,” on Sept. 12, from 11:30 a.m. to 1 p.m. EDT. The webinar will be hosted by Dr. Robert M. Koerner. GMA member companies and their employees receive discounted rates on all GSI webinar and short course registrations.

This webinar will begin with Terzaghi’s consolidation work (extended by Barron) leading directly to consolidation of saturated soils using the technique of sand drains. It will then describe a case history failure resulting in a $6 million judgment against the design consultant.

This project (and greater economic efficiency) led directly to the use of wick drains, also called prefabricated vertical drains (PVDs). They will be described and illustrated along with concerns of kinking and smear. The requisite research design will be numerically illustrated to arrive at a satisfactory factor-of-safety flow value.

This body of work on drainage, however, has a direct relationship on stability of soft soils using the technique of stone columns. Now, using columns of sand encased in a geotextile, we have a method to both simultaneously drain soft saturated soils and stabilize the site against shear failure as occurred in the case history cited previously. The technology, including its installation, has indeed come full-circle.

This webinar will be beneficial for public and private leaders of transportation, geotechnical, hydraulic and environmental facilities; consultants and designers in the private sector; regulators and agency personnel at the federal, state and local levels; geosynthetic manufacturers and their representatives; geotechnical and geosynthetic testing organization personnel; contractors and installers of geosynthetic systems; academic and research groups; and others desiring technically related information on this important aspect of our constructed environment.

The webinar’s instructor, Dr. Koerner, is professor emeritus of civil engineering at Drexel University, and founder and director emeritus of the Geosynthetic Institute.

Webinars cost $200.00 for GSI and Geosynthetic Materials Association (GMA) members, and $250.00 for nonmembers. Successful completion of a multiple-choice test after the webinar carries 1.5 professional development hours (PDH).

For more information or to register, visit

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