Analytical Model for the End-Bearing Capacity of Tapered Piles Using Cavity Expansion Theory

On the basis of evidence from model tests on increasing the end-bearing behavior of tapered piles at the load-settlement curve, this paper proposes an analytical spherical cavity expansion theory to evaluate the end-bearing capacity. The angle of tapering is inserted in the proposed model to evaluate the end-bearing capacity. The test results of the proposed model in different types of sands and different relative densities show good effects compared to conventional straight piles. The end-bearing capacity increases with increases in the tapering angle. The paper then propounds a model for prototypes and real-type pile tests which predicts and validates to evaluate the end-bearing capacity.

[1]  M. Hesham El Naggar,et al.  Load transfer of fibre-reinforced polymer (FRP) composite tapered piles in dense sand , 2004 .

[2]  Noriyuki Yasufuku,et al.  GEOTECHNICAL ANALYSIS OF SKIN FRICTION OF CAST-IN-PLACE PILES RELATED TO CRITICAL STATE FRICTION ANGLE , 1999 .

[3]  Bolton.  What are partial factors for , 1993 .

[4]  落合 英俊,et al.  PILE END-BEARING CAPACITY OF SAND RELATED TO SOIL COMPRESSIBILITY , 2001 .

[5]  Hidetoshi Ochiai,et al.  The Coefficient of Earth Pressure at Rest of Sands , 1976 .

[6]  A. M. Rybnikov.  Experimental investigations of bearing capacity of bored-cast-in-place tapered piles , 1990 .

[7]  Misko Cubrinovski,et al.  EMPIRICAL CORRELATION BETWEEN SPT N-VALUE AND RELATIVE DENSITY FOR SANDY SOILS , 1999 .

[8]  Norihiko Miura.  Point Resistance of Piles in Sand , 1983 .

[9]  平山 英喜.  LOAD-SETTLEMENT ANALYSIS FOR BORED PILES USING HYPERBOLIC TRANSFER FUNCTIONS , 1990 .

[10]  土岐 祥介,et al.  A SAMPLE PREPARATION METHOD AND ITS EFFECT ON STATIC AND CYCLIC DEFORMATION-STRENGTH PROPERTIES OF SAND , 1982 .

[11]  J. Kérisel,et al.  FIELD TESTS OF PILES IN SAND , 1972 .

[12]  M. Nehdi,et al.  Wave equation analyses of tapered FRP–concrete piles in dense sand , 2007 .

[13]  C. P. Wroth,et al.  Pressuremeter tests in sands , 1977 .

[14]  M. M. Baligh,et al.  Cavity Expansion in Sands with Curved Envelopes , 1976 .

[15]  A. S. Vesić.  Expansion of Cavities in Infinite Soil Mass , 1972 .

[16]  End bearing capacity of tapered piles in sands using cavity expansion theory , 2011 .

[17]  Colin Anthony Taylor,et al.  SHAKING TABLE TESTING OF GEOTECHNICAL MODELS , 2002 .

[19]  Noriyuki Yasufuku,et al.  Pile end-bearing capacity in crushable sands , 1995 .

[20]  Norihiko Miura,et al.  EFFECT OF PARTICLE-CRUSHING ON THE SHEAR CHARACTERISTICS OF A SAND , 1977 .

[21]  H. Nagaoka,et al.  Finite Element Method Applied to Biot’s Consolidation Theory , 1971 .