The final segment of our three-part series on geosynthetic clay liner (GCL) shear strength is devoted to dynamic strength, the strength measured for rapid loading conditions. Static shear strengths have been reported for a wide variety of GCLs and GCL interfaces. A research program has been completed on dynamic internal and interface shear strengths for needle-punched (NP) GCLs and textured geomembranes, as these are common liner materials, particularly in North and South America. The shearing surfaces prevent specimens from slipping and thereby avoid associated progressive failure effects. Monotonic tests consisted of a single shear thrust at a specified displacement rate. Cyclic shear tests consisted of back-and-forth shear motion at a specified frequency and displacement amplitude. Published strength data are suitable only for preliminary design purposes. Final design strengths must always be measured using project-specific tests.
|Original language||English (US)|
|Number of pages||5|
|State||Published - Oct 1 2013|
All Science Journal Classification (ASJC) codes
- Geotechnical Engineering and Engineering Geology
- Polymers and Plastics