Study of Lateral Load Influence on Behaviour of Negative Skin Friction on Circular and Square Piles

Abstract

Negative skin friction developed on the pile surface causes many problems when piles are built in fully saturated clay. In this work, a study of NSF on a square cross-section pile corresponding to the circular pile circumference was developed. The pile was modeled as a concrete element, embedded and fully contacted with fully saturated soft clay. The clay layer is supported on a sand layer as a sub-base using ABAQUS software, and the NSF was developed on piles due to the consolidation of the clay over a 5-year period. A square pile has been found to provide lower NSF values than a round pile. Then, for the first investigation, both piles were loaded with lateral loads at the top to investigate the effect of the horizontal load on the NSF values, as there is no literature or study done on this point. The results emphasized that lateral loads reduce the NSF developed on piles. A parametric study was performed to investigate the parameters affecting the NSF values induced on piles, such as soil permeability, ballast, and lateral load values. It was concluded that square piles provide better NSF values than round piles for both single piles and pile groups. Doi: 10.28991/CEJ-2022-08-10-08 Full Text: PDF

Numerical Studies on Performance of Helical Pile-supported Embankments Over Soft Clay

“…Sliding occurs when the shear stress exceeds the shear strength. The coefficient of friction was assumed to be equal to 0.7 (38,39).…”

Consolidation and seepage solutions in enclosure space based on non-zero-constant values boundary

“…Combining the initial conditions for the consolidation seepage and complete orthogonality described above, series solution of V(r,z,t) can be derived and shown as Eq (13) Vðr; z; tÞ ¼…”

“…The literature [ 12 ] proposes a solution using a hybrid pile type, investigates the mechanical behavior of hybrid piles with strain gauges installed along the bearing during load tests, and presents a numerical simulation method for energy hybrid pile behavior. The literature [ 13 ] applies the finite difference method to numerically simulate groundwater flow to analyze the seepage failure mode of non-cohesive sand inside a cofferdam. The study investigates the influence of cofferdam radius, internal soil friction, and soil expansiveness on the failure mode.…”

“…The relationship between consolidation degree and bearing capacity, to some extent, can be considered that the change of consolidation degree and bearing capacity with time is corresponding, so this paper studies the orthotropic (transverse isotropic) soil consolidation solution between pile groups in a closed environment from the perspective of soil consolidation. Articles [5][6][7]research the lateral load influence on behaviour of negative skin friction on circular and square piles, hybrid energy piles as a smart and sustainable foundation and numerical analysis of seepage failure modes of sandy soils within a cylindrical cofferdam.…”

Evaluating Differences in Foundation Depth Planning and Implementation for Building Structure Safety

“…Evaluation is needed to identify safety and can be the basis for further planning to minimize potential problems [6]. The importance of this evaluation does not only apply to this lecture building construction project but is also relevant for many other locations that may face similar problems [11].…”