The default position for high quality geomembrane liner installations is to not allow large patches on exposed HDPE geomembrane lined slopes. The concern is around stress cracking over time due to liner degradation and potential high loads from wind uplift and thermal movement of the liner. The potential rejection of slope panels can have serious program and cost implications on projects. This paper presents on some 3D strain and stress modelling conducted on a geomembrane lined slopes which considers the geometric details of the panel welds of large patches on the slope. The conclusion of the modelling show that under certain conditions the conventional approach to repairs on slopes may be modified.
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