Abstract
This paper, with a focuses on the pile-supported embankment with a conical pile-head, proposes a theoretical solution which incorporates all the load transfer mechanisms, namely the soil arching effect, the pile–soil interaction, and the support from the substratum, whilst an improved cylindrical unit cell model is introduced to analyze the soil arching effect. The theoretical solution has been verified via numerical analysis and a literature method. The comparative results indicate that the proposed theoretical solution can effectively evaluate the pile-supported embankment with a conical pile-head. Furthermore, parametric studies have also been conducted to analyze the effect of model parameters on the load sharing ratio (ne), the pile–soil stress ratio (n), and the pile shaft friction.
Highlights
The solution of the proposed method is acquired by coupling the deformation equation of the embankment with the deformation equation of the composite foundation according to thePicleoninticnlusitiyonofissctroenssidanerdeddiasspolanceemofetnhte
The solution of the proposed method is acquired by coupling the deformation equation of the embankment with the deformation equation of the composite foundation according to the continuity of stress and displacement
The embankment loads above the plane of equal settlement are not all transferred to the pile, but are assigned to the pile and soil according to the load sharing ratio
Summary
The geometric parameters Lp, r1, r2, α, and L0 respectively represent the pile length, maximum radius, minimum radius, the cone angle, and the height of the conical head. The neutral point is located where the settlement of the soil and pile is equal and the friction is zero at the neutral point. L1 represents the height from the pile top to the neutral point. There is a local coordinate system that the datum point is located at the pile top and the downward direction is positive. According to the characteristics of the pile–soil interaction, the reinforced zone can be divided into three zones: (1) the zone of the conical hAepapdl. Sc(i2.)20th19e, 9z,o2n65e8of positive friction, and (3) the zone of negative friction.
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