Assessment of the effect of DCP tip angle on its results repeatability

Document Type : Original Article

Authors

1 Ph.D student, Department of Engineering Geology, Tarbiat Modares University

2 Assistant professor, Department of Engineering Geology, Tarbiat Modares University, nikudelm@modares.ac.ir

3 Professor, Department of irrigation Engineering, Tehran university

Abstract

Dynamic probing for the assessment of engineering geology and geotechnical projects is a cheaper, quicker and easier method than other methods. The Dynamic Cone Penetrometer is a light weight type of dynamic penetrometer. This device has used to determine CBR of pavement bases and sub bases up to 1 to 1.2 m depths. The aims of this study are to extend application of DCP and assessment of the tips angle effect on repeatability of DCP results. Assessment of the repeatability results and probability distribution functions show that the results are repeatable. The coefficient of determination (R2) show the best distribution functions are lognormal and then normal for the mean of results. Assessment of the effect of tip angle on repeatability is shown the tip with 90° angle is more repeatable than other tips.

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References

خداپرست، مهدی (1384) توسعه تکنیک های شناسایی خاکها با کاوشگرهای دینامیکی. رساله دکتری مهندسی عمران، دانشکده فنی، دانشگاه تهران، 125 صفحه.
 اسماعیلیان، مهدی (1385)راهنمای جامع SPSS 14 " انتشارات موسسه فرهنگی هنری دیباگران تهران، 574 صفحه.
 
American Society of Testing Materials (2003) Standard Test Method for Use of the Dynamic Cone Penetrometer in Shallow Pavement Applications. ASTM D 6951-03, ASTM International, West Conshohocken, PA.
BS 5930 (1999) Code of Practice for Site Investigation.  British Standard Institution; 192 p.
Butcher, A.P.; Mcelmeel, K. and Powel, J.J.M. (1995) Dynamic probing and its use in clay soils. Proceeding of Advance in Site Investigation Practice; Thomas Telford; London; pp. 383-395.
Card¸ G.B.; Roche¸ D.P.; Herbert¸ S.M. (1990) Application of continuous dynamic probing in ground investigation. Field Testing in Engineering Geology; Geological Society Engineering Geology Special Publication No 6; pp. 129-135.
Clayton C.R.I., SimonsI, N.E. and Matthew, F.M.C. (1995) Site Investigation. 2nd edition; Blackwell Science; Inc.; 592 p.
DIN 4094 (1974) Dynamic and static penetrometers, Dimensions of apparatus and method of operation. Deutsches Institut fur Normung e. V. Berlin.
Edill, T.B., Benson, C.H. (2005) Investigation of the DCP and SSG as alternative methods to determine subgrade stability, department of civil and environmental engineering, university of Wisconsin-Madison.
Fakher A., Khodaparast M. and Jones C.J.F.P. (2006) The use of the Mackintosh Probe for site investigation in soft soils. Quarterly Journal of Engineering Geology and Hydrogeology, 39, 189–196.
Lee, I.K.; White W.; Ingles, O.G.; 1983.Geotechnical Engineering. Copp Clark Pitman; Inc. pp. 57-89.
Mohammadi, S.D., Nikudel, M.R., Khamehchiyan, M. (2007) The use of Dynamic Cone Penetrometer (DCP) to determine some useful relationships for sandy and clayey soils. Proceeding of first Sri Lankan Geotechnical Society (SLGS) International Conference on Soil and Rock Engineering, Colombo.
Scala, A.J. (1959) Simple Method of Flexible Pavement Design Using Cone Penetrometers, In Proceedings of 2ndAustralian – New Zealand Conference on Soil Mechanics and Foundation Engineering, New Zealand.
 
 
 
 
Scientific Quarterly Journal of Iranian Association of Engineering Geology
Volume 1, Issue 2
September 2008
Pages 31-42

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History

  • Receive Date: 28 November 2007
  • Revise Date: 18 June 2008
  • Accept Date: 22 January 2008

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