While not specific to tailings, knowledge of geosynthetics is valuable to tailings engineers. This webinar presents an overview of the worldwide industry known as “Geosynthetics”. Each type will be described and elements of their primary design function will also be explained. Applications will then be addressed in the four major thrust areas that geosynthetics have focused upon. They are: transportation and geotechnical (paved and unpaved roads, walls, slopes); geoenvironmental (landfills, surface impoundments); hydraulic engineering (dams, tunnels, canals); and private development (parks, sport fields, aquaculture, agriculture).
This webinar presents an analysis of the common problem of a veneer of cover soil (0.3 to 1.0 m thick) on a geomembrane at a given slope angle and length. The webinar then presents different scenarios that create lower FS-values than the gravitational stresses of the above situation, e.g., equipment loads, seepage forces and seismic loads. As a counterpoint, different scenarios that create higher FS-values also are presented, e.g., toe berms, tapered thicknesses and veneer reinforcement. In this latter category, a subdivision is made between intentional reinforcement (using geogrids or high strength geotextiles) and non-intentional reinforcement (cases where geosynthetics overlay a weak interface within a multi-lined slope).
While not specific to tailings, this webinar includes valuable knowledge for tailings engineers. Geosynthetics have made a major impact regarding erosion control and revegetation of soil slopes. Whether temporary or permanent time frames, these easy-to-use rolled products come in many types and varieties. This webinar properly characterizes the materials and then provides designs for their use on both soil slopes and in channel/ditches. This webinar also presents laboratory bench-scale and full-scale field test methods. It also explains those methods. This webinar discusses a new generic turf reinforcement mat (TRM) specification, along with the required test methods which are necessary for use by designers and specifiers. The webinar concludes with a summary and recommendation section.
While not specific to tailings, this webinar includes valuable knowledge for tailings engineers. Soil slopes continue to fail either naturally or by being induced through construction activities. They are occasionally deep-seated and catastrophic, but are more often small in the form of veneer or shallow failures, the latter category being the topic of this webinar. The approach developed and used herein is an in-situ stabilization method before the potential slide occurs. It is based on using a surface deployed geosynthetic that is either nailed (or anchored) to the retained soil. The original method proposed by the author used a knit fabric on the soil surface retained by hand-driven soil nails. The requisite theories (Bishop simplified and COE wedge) were modified for the inclusions and are illustrated accordingly. A patent was granted in 1986 and abruptly resulted in complete silence for 17+ years by contractors, manufacturers, owners, etc. Interestingly, in the past 5-10 years (after expiration of the patent), at least thirteen companies have used this technique, each of which will be illustrated. All types of geosynthetics (and even wire mesh) are being used on the soil's surface and small anchors (Duckbill or Platypus) seem to be the current tendency as opposed to soil nails. This webinar presents another form of ground stabilization which appears to be finally taking-off. This webinar attempts to capture not only the past but the present as well.