Out-of-Plane Tensile Behavior of Geosynthetic Clay Liners

Abstract

Presented in this paper is the out-of-plane tensile behavior of a variety of geosynthetic clay liners (GCLs). Tensile response curves indicate that GCL strength is largely dependent on the carrier material types from which the GCL is manufactured. Fiber reinforcement effects as well as orientation effects were relatively small for this type of test. The effects of hydration and seams were also assessed. The study shows that GCLs can withstand considerably greater out-of-plane deformation than compacted clay liners (CCLs). Review of the results indicates that GCLs should be considered over CCLs for use as barrier layers where differential subsidence is anticipated.

Strength Characteristics of a Smooth HDPE Geomembrane/Nonwoven Geotextile Interface Based on a Novel Ring Shear Apparatus

“…The GMB-S/NW GTX interface was one of the interfaces where instability and failure of the landfill occurred in 1988 [10,11]. In applications involving drainage filtration, separation, protection, and reinforcement, a composite system is typically employed by combining GMB-S and NW GTX rather than using standalone units [7,8,12]. The interfacial shear strength of the liner system incorporating GMB-S and NW GTX is crucial to the stability of overlying structures supported by the system.…”

The Influence of Geometric Structure of Geogrids on the Pullout Resistance

“…Moreover, the geometry of geogrid has a certain spatial characteristics, resulting in the ribs of geogrid embedded in the soil when there is displacement between geogrid and soil [4]. It is generally considered that the pullout resistance of grid reinforcement mainly includes two components: the friction resistance mobilized on the surface of the longitudinal members and the passive resistance mobilized against the front of transverse members [5]. In general, the former takes priority of passive resistance during the pullout test.…”