Geomembrane Strain Observed in Large-Scale Testing of Protection Layers
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 126, Issue 12
Abstract
A method for estimating the local strain in a geomembrane due to the indentation of gravel particles is presented. The accuracy of various strain calculation methods is evaluated by a series of tests, and it is shown that the traditional arch elongation method provides only an approximate estimate of the magnitude of strain induced in the geomembrane due to indentation and does not adequately define the distribution of strain. Consideration of the combined membrane and bending strains as proposed here is shown to provide a better representation of the distribution of strains and enhances the evaluation of the peak strains in the geomembrane caused by local indentations. Large-scale tests are conducted using different protection layers, and the strains are reported based on both the arch elongation method and the combined bending and membrane theory. The results indicate that the best protection for the underlying geomembrane was provided by a sand-filled geocushion or a special rubber geomat, which limited strains induced by coarse (40–50 mm) angular gravel to 0.9% at 900 kPa and 1.2% at 600 kPa. The poorest performance was achieved using nonwoven geotextiles with a maximum strain of 8% being obtained with a 435 g/m2 geotextile at 250 kPa and 13% with two layers of 600 g/m2 geotextile at 900 kPa.
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References
1.
Berg, R. R., and Bonaparte, R. ( 1993). “Long-term allowable stresses for polyethylene geomembranes.” Geotextiles and Geomembranes, Oxford, U.K., 12, 287–306.
2.
Bishop, D. J. ( 1996). “Discussion of `A comparison of puncture behavior of smooth and textured HDPE' and `Three levels of geomembrane puncture protection' by D. B. Najero.” Geosynthetics Int., 3(3), 441–443.
3.
Brachman, R. W. I., Moore, I. D., and Rowe, R. K. ( 2000). “The design of a laboratory facility for evaluating the structural response of small diameter buried pipes.” Can. Geotech. J., Ottawa, 37(2), 281–295.
4.
Brummermann, K., Blümel, W., and Stoewahse, C. ( 1994). “Protection layers for geomembranes: Effectiveness and testing procedures.” Proc., 5th Int. Conf. on Geosynthetics, 1003–1006.
5.
Brune, M., Ramke, H. G., Collins, H., and Hanert, H. H. ( 1991). “Incrustatian process in drainage systems of sanitary landfills.” Proc., 5th Int. Landfill Symp., 999–1035.
6.
Bundesanstalt für Materialforschung und -prüfung (BAM). ( 1994). “Guidelines for the certification of geomembranes as a component of composite liners for municipal and hazardous waste landfills and for lining contaminated land.” Berlin.
7.
Corbet, S. P., and Peters, M. ( 1996). “First Germany/USA Geomembrane Workship.” Geotextiles and Geomembranes, Oxford, U.K., 14(12), 647–726.
8.
Fleming, I. R., Rowe, R. K., and Cullimore, D. R. ( 1999). “Field observations of clogging in a landfill leachate collection system.” Can. Geotech. J., Ottawa, 36(4), 289–296.
9.
Gallagher, E. M., Darbyshire, W., and Warwick, R. G. ( 1999). “Performance testing of landfill geoprotectors: Background, critique, development and current UK practise.” Geosynthetics Int., 6(4), 283–301.
10.
Giroud, J. P. ( 1996). “Workshop on testing of geosynthetic materials for landfill liners and covers.” IGS News, 12(2), 3–4.
11.
Giroud, J. P., Bonaparte, R., Beech, J. F., and Gross, B. A. ( 1990). “Design of soil layer-geosynthetic systems overlying voids.” Geotextiles and Geomembranes, Oxford, U.K., 9(1), 11–50.
12.
Koerner, R. M., Koerner, G. R., and Hwu, B.-L. ( 1990). “Three dimensional, axi-symmetric geomembrane tension test.” Spec. Tech. Publ. No. 1081, ASTM, West Conshohocken, Pa., 170–184.
13.
Koerner, R. M., Wilson-Fahmy, R. F., and Narejo, D. ( 1996). “Puncture protection of geomembranes Part III: Examples.” Geosynthetics Int., 3(5), 655–675.
14.
Merry, S. M., and Bray, J. D. ( 1995). “Size effects for multi-axial tension testing of HDPE and PVC geomembranes.” Geotech. Testing J., 18(4), 441–449.
15.
Narejo, D. B., Koerner, R. M., and Wilson-Fahmy, R. F. ( 1996). “Puncture protection of geomembranes Part II: Experimental.” Geosynthetics Int., 3(5), 629–653.
16.
Narejo, D. B. ( 1995). “Three levels of geomembrane puncture protection.” Geosynthetics Int., 2(4), 765–769.
17.
Reddy, K. R., Bandi, S. R., Rohr, J. J., Finy, M., and Siebken, J. ( 1996). “Field evaluation of protective covers for landfill geomembrane liners under construction loading.” Geosynthetics Int., 3(6), 679–700.
18.
Richardson, G. N. ( 1996). “Field evaluation of geosynthetic protection cushion.” Geotech. Fabrics Rep., 14(2), 20–25.
19.
Rowe, R. K. ( 1998). “Geosynthetics and the minimization of contaminant migration through barrier systems beneath solid waste.” Proc., 6th Int. Conf. on Geosynthetics, Vol. 1, Industrial Fabrics Assoc. International, Roseville, Minn., 27–102.
20.
Rowe, R. K., Fleming, I., Cullimore, R., Kosaric, N., and Quigley, R. M. ( 1995). “A research study of clogging and encrustation in leachate collection systems in municipal solid waste landfills.” Rep. Submitted to Intern Waste Authority Ltd., Geotech. Res. Ctr., University of Western Ontario, London, Ont., Canada.
21.
Seeger, S., and Müller, W. ( 1996). “Requirements and testing of protective layer systems for geomembranes.” Geotextiles and Geomembranes, Oxford, U.K., 14, 365–376.
22.
Sehrbrock, U. ( 1993). “Prüfung von Schultzlagen für Deponieabdichtungen aus Kunststoff.” Doktorthese, Technischen Universität Carolo-Wilhelmina zu Braunschweig, Deutschland (in German).
23.
Tognon, A. ( 1999). “Laboratory testing of geosynthetics used in landfill barrier systems.” M.E.Sc. thesis, Facu. of Engrg. Sci., University of Western Ontario, London, Ont., Canada.
24.
Wilson-Fahmy, R. F., Narejo, D., and Koerner, R. M. ( 1996). “Puncture protection of geomembranes Part I: Theory.” Geosynthetics Int., 3(5), 605–628.
25.
Zanzinger, H., and Gartung, E. ( 1996). “Efficiency of puncture protection layers.” Proc., 6th Int. Conf. on Geosynthetics, Industrial Fabrics Assoc. International, Roseville, Minn., 285–288.
Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 126 • Issue 12 • December 2000
Pages: 1194 - 1208
History
Received: Jul 15, 1999
Published online: Dec 1, 2000
Published in print: Dec 2000
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