Abstract
The authors previously published two papers to study the influence of using non-standard hammer-weight (Wi) on the obtained blow counts, (Ni) during the SPT test. The current study is an extension to the past work; here the hammer drop height (Hi) has been changed to investigate its effect on the obtained blow counts, (Ni). Then, the multiple action of changing non-standard energy (Wi.Hi) is also investigated. The hammer weight, its drop height and the machine efficiency ( ) present the three main variables during the study.
The study methodology is experimental work and the method is physical model simulates the behavior of SPT-Rig. It has been designed and manufactured in house. The model is capable to change the hammer weight, its drop height and the overall machine efficiency. Five hammer weights, five drop heights and six different efficiencies have been changed all together; individually as well as in groups. The hammer weight ratios (Wi/Ws) and drop height ratios (Hi/Hs) each has been changed to cover the spans of 0.2, 0.4, 0.6, 0.8 and 1.0. Furthermore, six efficiencies ( ) have been changed with every change of the above ratios to cover the scope of, = 35%, 50%, 60%, 70%, 85% and 100%. Reconstituted well graded clean silicate dense sand (SW) is used for modeling the soil.
Novel procedure has been advised as well as empirical equations have been proposed to re-adjust the incorrect blow counts (Ni) obtained using non-standard SPT parameters or uses machines of a low efficiency. Also, a simplified method fast and costless has been suggested to sort out the problem of machines owing low efficiencies. Finally, some modifications to well-known formula are advised.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Aggour, M.S., Radding, W.R.: Standard Penetration Test (SPT) Correction. Technical Report. Civil and Environmental Engineering Department, University of Maryland (2001)
Ameratunga, J., Sivakugag, N., Das, B.M.: Correlations of Soil and Rock Properties in Geotechnical Engineering. Springer, India (2016)
ASTM, 1999, D 1586-99. Standard Test Method for Penetration Test and Split-Barrel Sampling of Soils. American Society for Testing and Materials. Annual Book of ASTM Standards, Philadelphia (1999)
Bazaraa, A.R.S.: Use of standard penetration test for estimating settlement of shallow foundations on sand. thesis presented to University of Illinois, in partial fulfillment of the requirements for the degree of Doctor of Philosophy (1967)
British Standards: Determination of the penetration resistance using the split barrel sampler. The standard penetration test, SPT. B.S.1377 Part 9 (1990)
Burmister, D.M.: The importance and practical use of relative density in soil mechanics. Proc. ASTM 48, 1249–1268 (1948)
Butler, J.J., Caliendo, J.A., Goble, G.G.: Comparison of SPT energy measurement methods. In: Proceedings of International Conference on Site Characterization, ISC 1998, Balkema, Rotterdam, The Netherlands, pp. 901–906 (1998)
De Mello, V.F.B.: The standard penetration test. In: In Proceedings of the 4th Pan-American Conference on Soil Mechanics and Foundation Engineering, San Juan, PR, vol. 1, pp. 1–86 (1971)
Fang, H.Y.: Foundation Engineering Handbook. Kluwer Academic Publishers, Boston (1999)
Farrar, J.A.: Summary of standard penetration test (SPT) energy measurement experiment. In: Proceedings of International Conference on Site Characterization, ISC 1998, Balkema, Rotterdam, The Netherlands, pp. 919–926 (1998)
Fletcher, G.F.A.: Standard penetration test: its uses and abuses. J. Soil Mech. Found. Div. 91(4), 67–75 (1965)
Howie, J., Campanella, R.G.: Energy measurement in the standard penetration test (SPT). Department of Civil Engineering, University of British Columbia, Vancouver, BC, Canada (2008)
Khater, R.Kh.: Correction factor to enhance the non-standard SPT hammer effect. In: 18th International Conference on Soil Mechanics and Geotechnical Engineering, World Academy of Science (2016)
Khater, R.Kh.: The SPT- theory practice and correlations. Text book style, under publication stage (2018)
Khater, R.Kh., Abdelrahman, G.E., Baset, M.A.: Equations to Correction SPT N-Values Obtained from Using Non-Standard Hammer Weight – Part I, International Civil Engineering and Architecture Conference, Karadeniz Technical University, Trabzon, Turkey (2019a)
Khater, R.Kh., Abdelrahman, G.E., Baset, M.A.: Equations to Correction SPT N-Values Obtained from Using Non-Standard Hammer Weight – Part II. Paper ID: 189. GeoSt.John’s 2019. In: The 72nd Canadian Geot. Conference, Newfoundland and Labrador, Canada (2019b)
Lamb, R.: SPT Hammer Calibration Update. A Memo to Geotechnical Engineering Section, Minnesota Department of Transportation (2000)
Look, B.G., Seldel, J.P., Sivakumar, S.T., Welikala, D.I.C.: Standard penetration test measurement variations exposed using a digital PDM device. In: International Conference on Geotechnical Engineering, ICGE, Colombo, pp. 451–454 (2105)
Peck, R.B., Bazaraa, A.R.S.: Discussion on settlement of spread footing on sand. J. Soil Mech. Found. Div. 95(5), 905–909 (1969)
Skempton, A.W.: Standard Penetration Test Procedures and the Effect in Sands of Overburden Pressure, Relative Density, Particle Size, Aging and Over consolidation. Geotechnique 36(3), 425–447 (1986)
Sherbiny, R.M., Salem, M.A.: Evaluation of SPT Energy for Donut and Safety Hammers Using CPT Measurements in Egypt. Cairo University, Egypt (2013)
Tokimatsu, K., Seed, Η.Β.: Evaluation of settlements in sand due to earthquake shaking. J. Geotech. Eng. 113(8) (1987)
Tsai, J.S., Liou, Y.J., Liu, F.C., Chen, C.H.: Effect of hammer shape on energy transfer measurement in the standard penetration test. Soil Found. 44(3), 103–114 (2004)
Youd, L., et al.: SPT hammer energy ratio versus drop height. J. Geotech. Geoenviron. Eng. (2008)
Acknowledgements
The authors present their deep gratitude to Prof Dr. A. Bazaraa for his kind personal communication, direct input and advices during discussions on topic.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 Springer Nature Switzerland AG
About this paper
Cite this paper
Khater, K.R., Baset, M.A. (2020). Equations to Correct SPT-N Values Obtained Using Non-standard Hammer Weight and Drop Height – Part III. In: Shehata, H., Brandl, H., Bouassida, M., Sorour, T. (eds) Sustainable Thoughts in Ground Improvement and Soil Stability. GeoMEast 2019. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-030-34184-8_10
Download citation
DOI: https://doi.org/10.1007/978-3-030-34184-8_10
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-34183-1
Online ISBN: 978-3-030-34184-8
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)