Pile End-Bearing Capacity of Sand Related to Soil Compressibility

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

“…Out of all the theoretical methods of geomechanics, the cavity expansion theory is particularly popular among geotech experts [4][5][6]. Yasufuku et al derived successfully an evaluation technique for the end-bearing capacity in nondisplacement straight cylindrical piles using a spherical cavity expansion theory for closed solutions [7,8]. This research asserts the use of the spherical cavity expansion theory as a way of evaluating the endbearing capacity of tapered piles based on axial cylindrical model tests.…”

“…This research asserts the use of the spherical cavity expansion theory as a way of evaluating the endbearing capacity of tapered piles based on axial cylindrical model tests. The tapering angle is inserted in the analytical model to evaluate the ultimate end-bearing capacity of the spherical cavity expansion theory previously postulated by Yasufuku et al [7,8]. The proposed model then referred to predict and validate other prototypes and real-type pile reference data to estimate the end-bearing capacity.…”

Seismic Bearing Capacity of Piles in Liquefiable Soils

“…The measured values of eŠective stress and shear modulus from the centrifuge tests have been incorporated into a modiˆed form of the spherical cavity expansion model for pile base capacity originally proposed by Vesic (1972) and later modiˆed by Yasufuku et al (2001). The method is modiˆed to account for the time varying parameters (sv ?…”

Foundations

“…Toe vertical bearing capacity As toe capacity is deeply related to the penetration mechanism of driven piles and penetration tests, understanding the toe capacity problem is important to understand the workability of pile installation and the evaluation of material properties by penetration tests. Evaluation methods for toe capacity are classiˆed into 1) Analogies of shallow foundations with overburden pressure (Hanna and Nguyen, 2002), 2) Estimations of plastic pressures based on the cavity expansion theory (e.g., Yasufuku et al, 2001), 3) Evaluations of changes in stresses and pore water pressures during penetration based on the strain path method, 4) Rigorous numerical analyses based on the mechanics of particles, such as the discrete element method (DEM), smoothed particle hydrodynamics (SPH), and the material point method (MPM). As far as soil plugging is concerned, Randolph et al (1991) proposed a one-dimensional analysis and Matsumoto and Takei (1991) reported their experiences in measuring at the access bridge to Kansai international airport.…”

“…Meyerhof's eŠective width concept has been extended to macro element concept (e.g., Okamura et al, 2002). The cavity expansion theory is still being used (Yasufuku et al, 2001). Yenumula et al (1999) proposed a modiˆed method of Brom's analysis.…”