Granular Matter

, Volume 7, Issue 4, pp 203–212 | Cite as

Ultimate bearing capacity of footings on coal ash



Coal ash is recognized as an alternative fill material to the conventional natural soils near a coal fired thermal power station where its large deposits are available. This paper presents experimental investigations on footings on coal ash subjected to loads. A series of laboratory model tests on varying sizes of footings were conducted. The conventional bearing capacity evaluation methods applied for natural soils do not consider progressive failure. These effects are explained based on the non-linear strength behavior of the granular soil and occurrence of progressive failure. The classical bearing capacity theory was applied in relation to the relative dilatancy of coal ash to describe this phenomenon. Few novel observations presented here show that the extent of progressive failure of ash fills is a compressed function of material characteristics of the ash, size and depth of footing and the settlement ratio.


Coal ash Plate load test Relative density Relative dilatancy Bearing capacity Settlement ratio 


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  1. 1.
    Trivedi, A.: Engineering behavior of coal ash, Ph.D. Thesis, Dept. Civil Eng., TIET, Patiala, 1999Google Scholar
  2. 2.
    Trivedi, A., and Sud, V.K.: ``Grain characteristics and engineering properties of coal ash''. Granular Matter, 4(3): 93–101 (2002)Google Scholar
  3. 3.
    Cunningham, J.A., Lukas, R.G., and Andreson, T.C.: ``Improvement of fly ash and stage - A case study''. Proc. Conf. Geotech. Practice for Disposal of Solid Waste Materials, ASCE, Ann Arbor, Mich., 227–45 (1977)Google Scholar
  4. 4.
    Toth, P.S., Chan, H.T., and Crag, C.B.: ``Coal ash as structural fill with reference to Ontario experience''. Can. G.J., Vol. 25, 594–704 (1988)Google Scholar
  5. 5.
    Seals, R.K., Moulton, L.K., and Kinder, D.L.: ``Insitu testing of a compacted fly ash fill''. Proc. Conf. Geotech. Practice for Disposal of Solid Waste Materials, ASCE, Ann Arbor, Mich., 493–516 (1977)Google Scholar
  6. 6.
    Schmertmann, J.H.: Guidelines for cone penetration test, performance and design. US Federal Highway Administration, Washington, DC, Report FHWATS-78–209, 145 (1978)Google Scholar
  7. 7.
    Cousens, T.W., and Stewart, D.I.: ``Behaviour of a trial embankment on hydraulically placed pfa''. Engineering Geology, 70: 293–303 (2003)Google Scholar
  8. 8.
    Trivedi, A., and Singh, S.: ``Cone resistance of compacted ash fill''. J. Testing and Evaluation, ASTM International, Vol. 32(6): 429–437 (2004)Google Scholar
  9. 9.
    Leonards, G.A., and Bailey, B.: ``Pulverized coal ash as structural fill''. J. Geotech. Eng., ASCE, 108: GT4, 517–531 (1982)Google Scholar
  10. 10.
    Prandtl, L.: Über die harte plastischer korper (in German). Nachr, Kgl. Ges Wiss Gottingen Math. Phys. K.O.I. Berlin, 74–85 (1920)Google Scholar
  11. 11.
    Reisner, H.: ``Zum erddrulk problem'', (in German). Proc. Ist Int. Conf. App. Mech., Delft, The Netherlands, 295–311 (1924)Google Scholar
  12. 12.
    Feda, J.: ``Research on bearing capacity of loose soil''. Proc. 5th Int. Conf. Soil Mech. Found. Eng., Paris, Vol. 1: 635–642 (1961)Google Scholar
  13. 13.
    Meyerhof, G.G.: `` Some recent research on bearing capacity of foundations ''. Can.G.J., Vol. 1(1): 16–26 (1963)Google Scholar
  14. 14.
    Meyerhof, G.G.: ``Shallow foundations''. J. Soil Mech. Found. Div., ASCE, Vol. 91: SM2, 21–31 (1965)Google Scholar
  15. 15.
    Brinch Hasen, J.: `` A revised and extended formula for bearing capacity''. Bulletin No.28, Danish Tech. Inst., Copenhagen, 5–11 (1970)Google Scholar
  16. 16.
    Vesiĉ, A.S.: ``Analysis of ultimate loads of shallow foundations''. J. Soil Mech. Found. Div., ASCE, Vol. 99: No. SM-1, 45–69 (1973)Google Scholar
  17. 17.
    Chen, W.F.: Limit analysis and soil plasticity. Elsevier, Amsterdam. 1975Google Scholar
  18. 18.
    Zadroga, B.: ``Bearing capacity of shallow foundations on noncohesive soils''. J. Geotech. Eng., ASCE, Vol. 120(11): 1991–2008 (1994)Google Scholar
  19. 19.
    de Beer, E.E.: `` The scale effect in the transposition of the results of deep sounding tests on the ultimate bearing capacity of piles and cassion foundations''. Geotechnique, 8(1): 39–75 (1963)Google Scholar
  20. 20.
    de Beer, E.E.: ``Bearing capacity and settlement of shallow foundations on sand''. Proc. Symposium on Bearing Capacity and Settlement of Foundations, Duke University, Durham, N.C., 15–33 (1965)Google Scholar
  21. 21.
    Mcdowell, G.R., and Bolton, M.D.: ``Effect of particle size distribution on pile tip resistance in calcareous sand in the geotechnical centrifuge''. Granular Matter, 2(4): 179–187 (2000)Google Scholar
  22. 22.
    Meyerhof, C.G.: ``The ultimate bearing capacity of foundations''. Geotechnique, 2(4): 301–332 (1951)Google Scholar
  23. 23.
    Rowe, P.W.: ``The stress dilatancy relation for static equilibrium of an assembly of particles in contact''. Proc. Roy. Soc., London, A269: 500–527 (1962)Google Scholar
  24. 24.
    de Josselin de Jong, G.: ``Rowe's stress dilatancy relation based on friction''. Geotechnique, 26(3): 527–534 (1976)Google Scholar
  25. 25.
    Bolton, M.D.: ``The strength and dilatancy of sands''. Geotechnique, 36(1): 65–78 (1986)Google Scholar
  26. 26.
    Salgado R., Bandini, P., and Karim, A.: ``Shear strength and stiffness of silty sand''. J. Geotech. and Geoenv. Eng., ASCE, Vol. 126(5): 551–562 (2000)Google Scholar
  27. 27.
    Billam, J.: ``Some aspects of the behaviour of granular material at high pressures''. Stress strain behaviour of soils, (ed. R.H.V.Parry), Foulis, London, 69–80 (1972)Google Scholar
  28. 28.
    Singh, R.: Small strain stiffness and strength characteristics of ash. M.E. Thesis, Dept. Civil Eng., TIET, Patiala, 2002Google Scholar
  29. 29.
    Perkins, S.W., and Madson, C.R.: ``Bearing capacity of shallow foundations on sand: A relative density approach''. J. Geotech. and Geoenv. Eng., ASCE, Vol. 126(6): 521–529 (2000)Google Scholar
  30. 30.
    Trivedi, A., and Sud, V.K.: ``Collapse behavior of coal ash''. J. Geotech. and Geoenv. Eng., ASCE, Vol. 130(4): 403–415 (2004)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  1. 1.Delhi College of EngineeringIndia
  2. 2.Department of Civil EngineeringDelhi College of EngineeringIndia
  3. 3.Department of Civil EngineeringThapar Institute of Engineering&Technology (Deemed University)India

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