Soil-Geosynthetic Interface Strengths Using a Torsional Ring Shear Apparatus

本研究的目的是评估在典型衬砌系统中发现的土-土工膜-土工布界面的静态和动态界面强度。这一目标将通过在各种衬垫界面上进行广泛的扭环剪切试验来实现。将使用环形剪切装置代替直接剪切或拔出装置，以允许在试验过程中在一个方向上实现大的连续剪切变形、恒定的横截面面积、更薄的土样允许更快的排水和更符合现场实例的剩余强度。

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.