Impact of Pressurized Liquids Addition on Landfill Slope Stability
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 138, Issue 4
Abstract
The addition of liquids to municipal solid waste landfills, a practice sometimes performed under pressure to promote moisture distribution, has the potential to affect slope stability as a result of increased pore water pressure (and reduced shear strength) in the landfilled waste. Liquids addition into waste by using buried horizontal trenches was modeled to determine pore water pressure distributions, and the resulting effect on slope stability was assessed for different operational strategies. Model results using typical mechanical properties for solid waste found that pressurized liquids addition under a sloped landfill surface was possible without inducing a slope failure, providing liquids distribution was not obstructed. A reduction in the factor of safety occurred when simulating a poorly functioning leachate collection and removal system, a low-permeability cover layer within the landfill, a seepage control strategy using low-permeability soil, high liquids addition pressures, and waste permeability decreasing with depth. The sensitivity of the model results to input parameters was evaluated and graphically presented. The results demonstrate how pressurized liquids addition has the potential to affect slope stability and provide important insights for engineers charged with designing and permitting such systems.
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Acknowledgments
This work was a product of a project conducted by Innovative Waste Consulting Services for the U.S. EPA’s Office of Research and Development.
References
Blight, G. (2008). “Slope failures in municipal solid waste dumps and landfills: A review.” Waste Manage. Res.WMARD8, 26(5), 448–463.
Bray, J. D., Zekkos, D., Kzvazanjian, E., Athanasopoulos, G. A., and Friemer, M. (2009). “Shear strength of municipal solid waste.” J. Geotech. Geoenviron. Eng., 135(6), 709–722.JGGEFK
Code of Federal Regulations. (2003). “National emission standards for hazardous air pollutants: Municipal solid waste landfills.” 40 CFR 63, Washington, DC.
Code of Federal Regulations. (1996). “Criteria for municipal solid waste landfills.” 40 CFR 258, Washington, DC.
Crosta, G. B., Chen, H., and Frattini, P. (2006). “Forecasting hazard scenarios and implications for the evaluation of countermeasure efficiency for large debris avalanches.” Eng. Geol., 83(1–3), 236–253.EGGOAO
Dixon, N., and Jones, D. R. V. (2005). “Engineering properties of municipal solid waste.” Geotext. Geomembr., 23(3), 205–233.
Gabr, M. A., Hossain, M. S., and Barlaz, M. A. (2007). “Shear strength parameters of municipal solid waste with leachate recirculation.” J. Geotech. Geoenviron. Eng., 133(4), 478–484.JGGEFK
Gasmo, J. M., Rahardjo, H., and Leong, E. C. (2000). “Infiltration effects on stability of a residual soil slope.” Comput. Geotech., 26(2), 145–165.CGEOEU
GeoSyntec Consultants. (2007). “Reviewers checklist: Slope stability analysis,” Prepared as part of the Fundamentals of Slope Stability and Settlement for Solid Waste Disposal Facilities, Univ. of Florida TREEO Center, Orlando, FL.
Hossain, M. S., and Haque, M. A. (2009). “Stability analyses of municipal solid waste landfills with decomposition.” Geotech. Geol. Eng., 27(6), 659–666.
Jain, P., Powell, J. P., Townsend, T. G., and Reinhart, D. R. (2006). “Estimating the hydraulic conductivity of landfilled municipal solid waste using the borehole permeameter test.” J. Environ. Eng., 132(6), 645–652.JOEEDU
Koerner, R. M., and Soong, T. Y. (2000). “Leachate in landfills: The stability issues.” Geotext. Geomembr., 18(5), 293–309.
Krahn, J. (2007a). Seepage modeling with SEEP/W: An engineering methodology, 2nd Ed., GEO-SLOPE Int., Calgary, Alberta, CA.
Krahn, J. (2007b). Stability modeling with SLOPE/W 2007: An engineering methodology, 2nd Ed., GEO-SLOPE Int., Calgary, Alberta, CA.
McCreanor, P. T., and Reinhart, D. R. (1999). “Hydrogynamic modeling of leachate recirculating landfills.” Waste Manage. Res.WMARD8, 17(6), 465–469.
Merry, S. M., Fritz, W. U., Budhu, M., and Jesionek, K. (2006). “Effect of gas on pore pressures in wet landfills.” J. Geotech. Geoenviron. Eng., 132(5), 553–561.JGGEFK
Ng, C. W. W., and Shi, Q. (1998). “A numerical investigation of the stability of unsaturated soil slopes subjected to transient seepage.” Comput. Geotech., 22(1), 1–28.CGEOEU
Powrie, W., and Beaven, R. P. (1999). “Hydraulic properties of household waste and implications for landfills.” Proc. ICE Geotech. Eng., 137(4), 235–247.
Reddy, K. R., Hettiarachchi, H., Parakalla, N., Gangathulasi, J., Bogner, J., and Lagier, T. (2009). “Hydraulic conductivity of MSW in landfills.” J. Environ. Eng., 135(8), 677–683.JOEEDU
Reinhart, D. R., and Townsend, T. G. (1998). Landfill bioreactor design & operation, CRC, Boca Raton, FL.
Stark, T. D., Eid, H. T., Evans, W. D., and Sherry, P. E. (2000). “Municipal solid waste slope failure. II. Stability analyses.” J. Geotech. Geoenviron. Eng., 126(5), 408–419.JGGEFK
Tchobanoglous, G., Theisen, H., and Vigil, S. (1993). Integrated solid waste management, McGraw-Hill, New York.
Thiel, R. S., and Christie, M. (2005). “Leachate recirculation and potential concerns on landfill stability.” Proc., NAGS 2005/ GRI 19 Conf., Geosynthetica.net, Jupiter, FL, 14–16.
Townsend, T. G., and Miller, W. (1998). “Leachate recyle using horizontal injection.” Adv. Environ. Res., 2(2), 129–138.AERDDP
Wan, Y., and Kwong, J. (2002). “Shear strength of soils containing amorphous clay-size materials in a slow-moving landslide.” Eng. Geol., 65(4), 293–303.EGGOAO
Zekkos, D. P. (2005). “Evaluation of static and dynamic properties of municipal solid-waste.” Ph.D. thesis, Univ. of California, Berkeley, CA.
Zekkos, D., et al. (2006). “Unit weight of municipal solid waste.” J. Geotech. Geoenviron. Eng., 132(10), 1250–1261.JGGEFK
Zhan, T. L. T., Chen, Y. M., and Ling, W. A. (2008). “Shear strength characterization of municipal solid waste at the Suzhou landfill, China.” Eng. Geol., 97(3–4), 97–111.EGGOAO
Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 138 • Issue 4 • April 2012
Pages: 472 - 480
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Oct 29, 2009
Accepted: Aug 2, 2011
Published online: Aug 4, 2011
Published in print: Apr 1, 2012
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