Soil-Geosynthetic Interface Strengths Using a Torsional Ring Shear Apparatus

本研究的目的是评估典型线性系统中土-土工膜-土工织物界面的静态和动态界面强度。这一目标将通过在各种衬管界面上进行广泛的扭转环剪切试验来实现。环形剪切装置将取代直接剪切或拉拔装置，以允许在一个方向上进行大的连续剪切变形，在测试过程中保持恒定的横截面积，更薄的土样允许更快的排水，以及与现场案例历史更好地一致的残余强度。

The objective of this research is to evaluate the static and dynamic interface strengths of the soil-geomembrane- geotextile interfaces found in typical liner systems. This objective will be accomplished by performing extensive torsional ring shear tests on the various liner interfaces. A ring shear apparatus will be used instead of a direct shear or pullout apparatus to allow for large continuous shear deformation in one direction, constant cross- sectional area during the test, thinner soil specimens permitting faster drainage and a residual strength in better agreement with field case histories.