Swipe to navigate through the chapters of this book
The influence of geomembrane in maintaining the sealing efficiency of a landfill cover system at the onset of flexural distress was studied by conducting a series of centrifuge tests performed at 40 gravities. The tests were performed using a 4.5 m radius beam centrifuge having a capacity of 2,500 g-kN available at IIT Bombay on model composite barriers of 0.6 m thickness. The thickness and tensile stiffness of the geomembrane were varied. All the models were instrumented with pore pressure transducers (PPTs), linear variable differential transformers (LVDTs), a digital camera and a charge-coupled device (CCD) video camera to study the performance of the barriers during centrifuge tests. The sealing efficiency of the composite barriers was found to be maintained even after the formation of full-depth cracks within 0.6 m thick clay barriers subjected to a maximum distortion level of 0.125. This observed behaviour is attributed to the downward thrust exerted by the deformed geomembrane at the zone of maximum curvature which hinders the infiltration of water through the cracks. The downward thrust exerted by the geomembrane on the clay barrier was found to be more for barriers provided with stiffer and thicker geomembrane.
Please log in to get access to this content
To get access to this content you need the following product:
ASTM D6988. (2008). Standard Guide for Determination of Thickness of Plastic Film Test Specimens. Philadelphia, Pa: American Society for Testing and Materials.
ASTM D6693. (2004). Standard Test Method for Determining Tensile Properties of Nonreinforced Polyethylene and Nonreinforced Flexible Polypropylene Geomembranes. Philadelphia, Pa: American Society for Testing and Materials.
Benson, C. H., Daniel, D. E., & Boutwell, G. P. (1999). Field performance of compacted clay liners. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 125(5), 390–403. CrossRef
Bouazza, A. (2002). Geosynthetic clay liners. Geotextiles and Geomembranes, 20(1), 1–17. CrossRef
Divya, P. V., Viswanadham, B. V. S., & Gourc, J. P. (2012). Influence of Geomembrane on the Deformation Behaviour of Clay-based Landfill Covers. Geotextiles and Geomembranes, 34, 158–171. CrossRef
Edelmann, L., Hertweck, M., & Amman, P. (1999). Mechanical behaviour of landfill barrier systems. Proceedings of the Institution of Civil Engineers-Geotechnical Engineering, 137(4), 215–223. CrossRef
Espinoza, R. D. (1994). Soil-geotextile interaction: Evaluation of membrane support. Geotextiles and Geomembranes, 13(5), 281–293. CrossRef
Gourc, J. P., Camp, S., Viswanadham, B. V. S., & Rajesh, S. (2010). Deformation behaviour of clay cap barriers of hazardous waste containment systems: full-scale and centrifuge tests. Geotextiles and Geomembranes, 28(3), 281–291. CrossRef
Jessberger, H. L., & Stone, K. J. L. (1991). Subsidence effects on clay barriers. Geotechnique, 41(2), 185–194. CrossRef
Qian, X., Koerner, R. M., & Gray, D. H. (2002). Geotechnical aspects of landfill design and construction (pp. 431–436). New Jersey, USA: Prentice Hall.
Rajesh, S., & Viswanadham, B. V. S. (2011). Hydro-mechanical behavior of geogrid reinforced soil barriers of landfill cover systems. Geotextiles and Geomembranes, 29(1), 51–64. CrossRef
Rowe, R. K. (2005). Long-term performance of contaminant barrier systems. Géotechnique, 55(9), 631–678. CrossRef
Sivakumar Babu, G. L., Reddy, K. R., Chouskey, S. K., & Kulkarni, H. (2010). Prediction of long-term municipal solid waste landfill settlement using constitutive model. Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management, ASCE, 14(2), 139–150. CrossRef
Tognon, A. R., Rowe, R. K., & Moore, I. D. (2000). Geomembrane strain observed in large-scale testing of protection layers. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 126(12), 1194–1208. CrossRef
- Influence of Geomembrane Stiffness on the Integrity of Landfill Covers: Centrifuge Modelling
P. V. Divya
B. V. S. Viswanadham
J. P. Gourc
- Springer Singapore
- Sequence number