International Journal of Advanced Materials Research
Articles Information
International Journal of Advanced Materials Research, Vol.2, No.2, Mar. 2016, Pub. Date: Mar. 18, 2016
New Approach for Evaluating the Bearing Capacity of Sandy Soil to Strip Shallow Foundation
Pages: 13-21 Views: 906 Downloads: 755
[01] Zainal Abdul Kareem E., Civil Engineering Department, University of Baghdad, Engineering College, Baghdad, Iraq.
[02] Amjad Ibraheem Fadhil, Civil Engineering Department, University of Baghdad, Engineering College, Uruk University, Baghdad, Iraq.
Bearing capacity prediction of shallow foundations is of great importance in shallow foundation design process. Many proposed and implemented methods have been used in this field of soil mechanics for many years and became a standard procedure for these calculations. This work proposes a new method with alternative and simpler approach to predict the ultimate bearing capacity of sandy soil suitable for shallow foundation using strip footing based on the soil surface, which can be further extended for other shapes of shallow foundations, under soil surface, or other types of soils (i.e. c–) soils. This approach is based on specifying the shape of the failure surface under shallow foundation which is located and defined by a new equation that may describe this surface instead of the multi–relations (i.e. log–spiral curve and a linear relationship proposed by Terzaghi, 1943 [1] and others).This proposed equation is to cover many internal friction angles () for sand, ranging from 10º to 50º and normalized for footing width (B); besides being more general and can be directly implemented for this range of internal friction angles of . Bearing capacity calculation results were found in good agreement with the results obtained from Terzaghi’s equation, Meyerhof’s [2], and solution based on Rankine wedges method, Lamb 1979 [3], though the values of equivalent Nγ were found more conservative but more realistic and agree with some bearing capacity design codes.
Shallow Foundation, Bearing Capacity, Failure Surface, Strip Footing
[01] Terzaghi, K. 1943. "Theoretical soil mechanics". John Wiley and Sons, INC., New York, NY, USA.
[02] Meyerhof, G. G. 1951. "The ultimate bearing capacity of foundations". Geotechnique, 2: 301-332.
[03] Lamb. T. W. and Whitman R. V., (1979). "Soil Mechanics", Joun Wiley and Sons.
[04] Mona Arabshahi et al." Three Dimensional Bearing Capacity of Shallow Foundations Adjacent to Slopes Using Discrete Element method". International Journal of Engineering, (IJE) Volume (4): Issue (2). 2010.
[05] Hung –chine-peng "Bearing Capacity of shallow foundation on sand and clay". Diploma, Taipei Institute of Technology, Taiwan, China, 1963.
[06] Vesic, A. S. 1973. "Analysis of ultimate loads of shallow foundations". Journal of the soil Mechanics and Foundation Division, 99(SMI): 45-73.
[07] Graham, J., Andrews, M. and Shields, D. H. (1988), "Stress Characteristics for Shallow Footings in Cohesionless Slope", Can. Geotech. J., 25(2), 238-249.
[08] Jyant Kumar and Priyanka Ghosh (2005) "Determination of Nγ for rough circular footing using method of characteristics". EJGE, 2005-0540.
[09] Georgiadis, K. (2010), "Undrained Bearing Capacity of Strip Footings on Slopes", J. Geotech. Geoenv. Engg., 136(5), 677–685.
[10] Lamyaa Najah Snodi (2011) "estimation of Nγ for strip and circular footing using the method of characteristics". Diyala journal of Engineering Sciences. ISSN. 1999-8716.
[11] Sieffert, J. G., y Bay-Gress, Ch. (2000). Comparison of the European bearing capacity calculation methods for shallow foundations; Geotechnical Engineering, Institution of Civil Engineers, Vol. 143, pp. 65-74.
[12] HANSEN J. B. A Revised and Extended Formula for Bearing Capacity. Danish Geotechnical Institute, Copenhagen, 1970, bulletin No. 28.
[13] EUROCODE 7. Calcul Geotechnique. AFNOR, XPENV 1997-1, 1996.
[14] Kumbhojkar, A. S. 1993. "Numerical evaluation of Terzaghi’s Nγ". Journal of Geotechnical Engineering, ASCE, 119(3): 598.
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