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Drainage geocomposites and PVC geomembranes for highway tunnel lining
October 1st, 2022
Figure 1. Tunnel view after gunite application The original design for the primary lining system for the Driskos Twin Tunnel along the Egnatia motorway in Greece, consisting of a PVC plasticized (PVC-P) geomembrane, called for a nonwoven geotextile, 500 g/m², as a puncture protection and drainage layer. The nature of the rock with high pressures […]
Long-term durability of geomembrane material and seams
April 1st, 2017
Introduction The Fabricated Geomembrane Institute (FGI), formerly the PVC Geomembrane Institute, in collaboration with the Minnesota Department of Natural Resources (Minn. DNR), has been conducting a study assessing the long-term durability of PVC geomembranes. Samples of three different 30-mil PVC geomembranes were placed at the bottom of a settling basin near the northern Minnesota town […]