Effect of effective overburden pressure on geomembrane/soil interface transmissivity. Issue 1 (2008)

• Record Type: Journal Article
• Authors: Chai, J.-C.; Hayashi, S.; Khalili, N.
• Is Part Of: Geosynthetics international. Volume 15:Issue 1(2008)
• Page Start: 31
• Page End: 42
• Publication Date: 2008
• Subjects: Geosynthetics -- Geomembrane -- Interface transmissivity -- Laboratory model test; Geosynthetics -- Periodicals; Geosynthetics; Periodicals; 624.1892
• DOI: 10.1680/gein.2008.15.1.31
• Languages: English
• ISSNs: 1072-6349

Abstract

Abstract : Fluid flow through a defect in the geomembrane of a composite geomembrane/soil liner (flow rate tests) and interface transmissivity tests between a geomembrane and a soil layer were conducted. The results are compared, and the effect of overburden pressure p ′ on the geomembrane/soil interface transmissivity θ and interface thickness t in is investigated. For flow rate tests, the values of θ are back-calculated using the Rowe and Touze-Foltz et al . solutions. With known values of θ, t in is calculated using Newton's viscosity law for fluid flow between two parallel plates. For the conditions considered, it is shown that θ and t in reduce significantly with increasing p ′. Comparisons are made between the calculated values of θ and t in and those reported in the literature. It is shown that ignoring the effect of p ′ on θ and t in can lead to gross overestimation of these parameters.