Improvement of Problematic Soils by Lime Slurry Pressure Injection: Case Study
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 136, Issue 10
Abstract
Lime slurry pressure injection (LSPI) is a stabilization operation used in problematic soils by transportation industries with the aim of improving the geotechnical properties and bringing excessive maintenance costs to an acceptable standard. This paper presents detailed field and laboratory studies of a lime/fly ash stabilized site at Breeza, NSW, Australia. The mixing of slurry into the soil with depths was investigated by excavating a trench while the improvement of geotechnical properties was determined in detailed field and laboratory tests. Visual observations of the surfaces of an excavated trench showed slurry to be distributed within the shrinkage cracks in the desiccated upper soil horizon whereas slurry was conveyed through planes of hydraulic fracture in the soils at greater depths. Laboratory swell tests on the stabilized soils demonstrated a statistically significant reduction of the intrinsic swell properties in the upper horizon of highly plastic clayey soils by LSPI. A gain in soil strength was observed in cone penetrometer test soundings conducted in stabilized soils. Scanning electron microscope and x-ray diffraction studies proved the underlying physicochemical and cementitious reaction processes in stabilized soils. Aggregation of the soils was observed with the outward diffusion of calcium cations within proximity of slurry seams and resulted in a subdued shrink/swell propensity.
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Acknowledgments
The writers acknowledge the support provided by Downer Edi Works and RailCorp Geotechnical Services during the field injection and investigation of LSPI stabilized site at Breeza, NSW, and the financial assistance of an ARC-Linkage grant.
References
ASTM. (1996). “Standard test methods for one-dimensional swell or settlement potential of cohesive soils.” D4246, West Conshohocken, Pa.
Boynton, R. S., and Blacklock, J. R. (1985). Lime slurry pressure injection bulletin, Bulletin 331, National Lime Association, Arlington, Va.
Croft, J. B. (1964). “The processes involved in the lime-stabilization of clay soils.” Proc., 2nd Conf. Aust. Rd Res. Bd., Vol. 2, The Board, Melbourne, 1169–1203.
Diamond, S., and Kinter, E. B. (1965). “Mechanisms of soil-lime stabilization: An interpretive review.” Highway Research Record 92, National Research Council, Washington, D.C., 83–103.
Fohs, D. G., and Kinter, E. B. (1972). “Migration of lime in compacted soil.” Public Roads, 37, 1–8.
Griffin, T. J. (1997). “Track infrastructure maintenance reduction strategies through formation stabilisation of heavy haul routes.” Proc., 6th Int. Heavy Haul Conf., Vol. 1, IHHA, Cape Town, 76–97.
Herzog, A., and Mitchell, J. K. (1962). “Reactions accompanying stabilization of clay with cement.” Highway Research Record 36, National Research Council, Washington, D.C., 146–171.
Ingles, O. G., and Neil, R. C. (1971). “Lime grout penetration and associated moisture movements in soil.” Proc., Symp. on Soils and Earth Structures in Arid Climates, Institution of Engineers, Australia, 37–41.
Joshi, R. C., Natt, G. S., and Wright, P. J. (1981). “Soil improvement by lime-flyash slurry injection.” Proc., 10th Int. Conf. on Soil Mechanics and Foundation Engineering, AA Balkema, Rotterdam, 707–712.
Kayes, I., Nissen, D., and Adamson, J. (2000). “Stabilisation of rail track formation and embankments.” Proc., CORE2000 Conf., RTSA, Glenelg, Australia.
Ledbetter, R. H. (1982). “Nondestructive tests for the evaluation of railroad track foundations and lime slurry pressure injection stabilization.” Waterways Experiment Station Rep. No. GL-85-2, U.S. Army Corps of Engineers, Vicksburg, Miss.
Marinho, F. A. M., and Oliveira, O. M. (2006). “The filter paper method revisited.” Geotech. Test. J., 29(3), 250–258.
Mitchell, J. K. (1981). “Soil improvement—State-of-the-art report.” Proc., 10th Int. Conf. on Soil Mechanics and Foundation Engineering, AA Balkema, Rotterdam, 509–565.
Murdoch, L. C. (2002). “Mechanical analysis of idealized shallow hydraulic fracture.” J. Geotech. Geoenviron. Eng., 128, 488–945.
Olsen, R. S., and Malone, P. G. (1988). “Soil classification and site characterization using the cone penetrometer test.” Penetration Testing ISOPT-1, Balkema, Rotterdam, Amsterdam, 887–893.
Pierce, J. W., and Siegel, F. R. (1969). “Quantification in clay mineral studies of sediments and sedimentary rocks.” J. Sediment. Petrol., 39(1), 187–193.
Porbaha, A., Shibuya, S., and Kishida, T. (2000). “State of the art in deep mixing technology. Part III: geomaterial characterization.” Ground Improv., 3, 91–110.
Snedecor, G. W., and Cochran, W. G. (1967). Statistical methods, 6th Ed., Iowas State Univ. Press, Ames, Iowa.
Taylor, H. F. W. (1991). Cement chemistry, Thomas Telford, London.
Thiele, R., and Adamson, J. (2006). Rehabilitation of the “Big Dipper.” A submission for the permanent way institute South Australian Section Incorporated “Track Work Achievement Award.”
Wilkinson, A. (2007). “Stabilisation of railway subgrades by lime slurry pressure injection.” Ph.D. thesis, Monash Univ., Melbourne, Australia.
Wilkinson, A., Haque, A., Kodikara, J., Adamson, J., and Christie, D. (2004). “Stabilisation of reactive subgrades by cementitious slurry injection—A review.” Austral. Geomech. J., 39(4), 81–93.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 136 • Issue 10 • October 2010
Pages: 1459 - 1468
Copyright
© 2010 ASCE.
History
Received: Oct 26, 2008
Accepted: Mar 23, 2010
Published online: Mar 25, 2010
Published in print: Oct 2010
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