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Based on a variety of case histories of site investigations, including extensive bore-hole data, laboratory testing and geophysical prospecting, an empirical formulation is proposed for the rapid determination of allowable bearing capacity of shallow foundations. The proposed expression consistently corroborates the results of the classical theory and is proven to be rapid and reliable. It consists of only two soil parameters, namely, the in situ measured shear wave velocity, and the unit weight. The unit weight may be also determined with sufficient accuracy by means of another empirical expression using the P-wave velocity. It is indicated that once the shear and P-wave velocities are measured in situ by an appropriate geophysical survey, the allowable bearing capacity as well as the coefficient of subgrade reaction and many other elasticity parameters may be determined rapidly and reliably through a single step operation, not only for soils, but also for rock formations. Such an innovative approach, using the seismic wave velocities only, is considerably cost- and time-saving in practice.
Wydawca
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Rocznik
Tom
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400--412
Opis fizyczny
Bibliogr. 26 poz.
Twórcy
Bibliografia
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- 4. Butcher, A.P., R.G. Campanella, A.M. Kaynia, and K.R. Massarsch (2005), Seismic cone downhole procedure to measure shear wave velocity - A guideline prepared by ISSMGE TC10: Geophysical Testing in Geotechnical Engineering, Proc. XVIth Inter. Conf. on Soil Mechanics and Geotechnical Engineering, May 2006, Osaka, Japan, 5 pp.
- 5. Campanella, R.G., and W.P. Stewart (1992), Seismic cone analysis using digital signal processing for dynamic site characterization, Canad. Geotech. J. 29, 3, 477-486.
- 6. Coates, D.F. (1970), Rock Mechanics Principles, Mines Branch Monographs 874, Department of Energy, Mines and Resources, Canada.
- 7. Eberhart-Phillips, D., D.-H. Han, and M.D. Zoback (1989), Empirical relationships among seismic velocity, effective pressure, porosity, and clay content in sandstone, Geophysics 54, 82-89, DOI: 10.1190/1.1442580.
- 8. Hardin, B.O., and W.L. Black (1968), Vibration modulus of normally consolidated clays, J. Soil Mechanics and Foundation Division ASCE 94, SM2, 353-369.
- 9. Hardin, B.O., and V.P. Drnevich (1972), Shear modulus and damping in soils, J. Soil Mechanics and Foundation Division ASCE, 98, SM7, 667-692.
- 10. Imai, T., and M. Yoshimura (1976), The relation of mechanical properties of soils to P- and S-wave velocities for soil ground in Japan, Urana Research Institute, OYO Corporation, Tokyo, Japan (internal publication), http://www.geophysical.com, e-mail: prosight@oyonet.oyo.co.jp.
- 11. IRTP (1999), ISSMGE Technical Committee TC16 Ground Property Characterization from In situ Testing, International Reference Test Procedure (IRTP) for the Cone Penetration Test (CPT) and the Cone Penetration Test with pore pressure (CPTU). In: F.B.J. Barends, J. Lindenberg, H.J. Luger, L. de Quelerij, and A. Verruijt (eds.), Proc. XIIth ECSMGE, Vol. 3, 2195-2222, A.A. Balkema, Amsterdam.
- 12. Jongmans, D. (1992), The application of seismic methods for dynamic characterization of soils in earthquake engineering, Bull. Eng. Geol. Environ. 46, 63-69, DOI: 10.1007/ BF02595035.
- 13. Keçeli, A.D. (1990), Determination of bearing capacity of soils by means of seismic methods, Geophys. J. 4, 83-92 (in Turkish).
- 14. Massarsch, K.R. (2004), Deformation properties of fine-grained soils from seismic tests. Keynote lecture, Inter. Conf. on Site Characterization, ISC'2, 19-22 Sept. 2004, Porto, 133-146.
- 15. Ohkubo, T., and A. Terasaki (1976), Physical property and seismic wave velocity of Rocks, OYO Corporation, Tokyo, Japan (internal publication), http://www.geophysical.com, e-mail: prosight@oyonet.oyo.co.jp.
- 16. Pyrak-Nolte, L.J., S. Roy, and B.L. Mullenbach (1996), Interface waves propagated along a fracture, J. Appl. Geophys. 35, 2-3, 79-87, DOI: 10.1016/0926-9851(96)00009-2.
- 17. Schulze, W.E. (1943), Grundbau, Deutsche Forschungsgesellschaft für Bodenmechanik, 7th ed., B.G. Taubner Publishers, Leipzig; also available: Technical University of Istanbul, 48, DK624-15, Uçler Printing House, Istanbul.
- 18. Sieffert, J.G., and Ch. Bay-Gress (2000), Comparison of the European bearing capacity calculation methods for shallow foundations, Geotech. Eng., Inst. Civil Eng. 143, 65-74.
- 19. Stokoe, K.H., and R.D. Woods (1972), In situ shear wave velocity by cross-hole method, J. Soil Mechanics and Foundation Division ASCE 98, SM5, 443-460.
- 20. Sully, J.P., and R.G. Campanella (1995), Evaluation of in situ anisotropy from crosshole and downhole shear wave velocities measurements, Geotechnique 45, 2, 267-282.
- 21. Tatham, R.H. (1982), Vp/Vs and lithology, Geophysics 47, 3, 336-344, DOI: 10.1190/1.1441339.
- 22. Terzaghi, K., and R.B. Peck (1967), Soil Mechanics in Engineering Practice, 2nd ed., John Wiley & Sons, London.
- 23. Tezcan, S.S., S.M. Erden, and H.T. Durgunoglu (1975), In situ measurement of shear wave velocity at Bogaziçi University Campus, Proc. Inter. Conf. on Soil Mechanics and Foundation Engineering, Vol. 2, 157-164, Istanbul Technical University, Istanbul.
- 24. Tezcan, S.S., Z. Ozdemir, and A. Keceli (2006), Allowable bearing capacity of shallow foundations based on shear wave velocity, J. Geotech. Geol. Eng. 24, 203-218, DOI: 10.1007/s.10706-004-1748-4.
- 25. Turker, E. (2004), Computation of ground bearing capacity from shear wave velocity. In: D. Bergman et al. (eds.), Continuum Models and Discrete Systems, Kluwer Academic Publishers, Netherlands, 173-180.
- 26. Wilkens, R., G. Simmons, and L. Caruso (1984), The ratio Vp/Vs as a discriminant of composition for siliceous limestones, Geophysics 49, 11, 1850-1860, DOI: 10.1190/1.1441598.
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Bibliografia
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bwmeta1.element.baztech-article-BSL8-0026-0022