G.J.W King

Bio: G.J.W King is an academic researcher from University of Liverpool. The author has contributed to research in topics: Pier & Lateral earth pressure. The author has an hindex of 1, co-authored 1 publications receiving 23 citations.

Three-dimensional finite element studies of the moment-carrying capacity of short pier foundations in cohesionless soil

Abstract: This study is concerned with the moment-carrying capacity of short pier foundations in loose and dense cohesionless soil. The results of non-linear three-dimensional finite element analyses are compared with data from centrifuge tests modelling the behaviour of 1 m diameter prototype piers. The numerical predictions are shown to be very sensitive to the value of coefficient of earth pressure at rest, and most closely match obserbations when coefficient of earth pressure at rest = 0.6 is assumed. The results of parametric studies of square prototype piers in loose and dense cohesionless soils are then presented. Empirical equation are derived between moment-carrying capacity and pier geometry, for limiting pier rotations of 1 degree and 2 degrees, and very close fits are demonstrated between the values given by these equations and the original computed values. (A)

Lateral Resistance of Short Single Piles and Pile Groups Located Near Slopes

Abstract: Many transmission towers, high-rise buildings, and bridges are constructed near steep slopes and are supported by large-diameter piles. These structures may be subjected to large lateral loads, suc...

Nonlinear analysis of laterally loaded rigid piles in cohesionless soil

Abstract: In this paper, a method is developed for nonlinear analysis of laterally loaded rigid piles in cohesionless soil. The method assumes that both the ultimate soil resistance and the modulus of horizontal subgrade reaction increase linearly with depth. By considering the force and moment equilibrium, the system equations are derived for a rigid pile under a lateral eccentric load. An iteration scheme containing three main steps is then proposed to solve the system equations to obtain the response of the pile. To determine the ultimate soil resistance and the modulus of horizontal subgrade reaction required in the analysis, related expressions are selected by reviewing and assessing the existing methods. The degradation of the modulus of horizontal subgrade reaction with pile displacement at ground surface is also considered. The developed method is validated by comparing its results with those of centrifugal tests and three-dimensional finite element analysis. Applications of the developed method to laboratory model and field test piles also show good agreement between the predictions and the experimental results.

Theory and Practice of Pile Foundations

Abstract: Pile foundations play an essential role in many structures, therefore it is vital that they be designed with the utmost reliability. The cost of failure is potentially huge. Covering a whole range of design issues relating to pile design, Theory and Practice of Pile Foundations presents economical and efficient design solutions and demonstrates them using real-world examples. The author presents his systematic approach to modelling pile responses in the context of load transfer models—an approach that leads to methods that require fewer parameters but can potentially solve more problems.

Laterally loaded rigid piles in cohesionless soil

Abstract: In this paper, limiting force profile for laterally loaded rigid piles in sand is differentiated from the on-pile force profile, from which elastic–plastic solutions are established and presented i...

Nonlinear analysis of laterally loaded rigid piles in cohesive soil

Abstract: SUMMARY This article presents a method for the nonlinear analysis of laterally loaded rigid piles in cohesive soil. The method considers the force and the moment equilibrium to derive the system equations for a rigid pile under a lateral eccentric load. The system equations are then solved using an iteration scheme to obtain the response of the pile. The method considers the nonlinear variation of the ultimate lateral soil resistance with depth and uses a new closed-form expression proposed in this article to determine the lateral bearing factor. The method also considers the horizontal shear resistance at the pile base, and a bilinear relationship between the shear resistance and the displacement is used. For simplicity, the modulus of horizontal subgrade reaction is assumed to be constant with depth, which is applicable to piles in overconsolidated clay. The nonlinearity of the modulus of horizontal subgrade reaction with pile displacement at ground surface is also considered. The validity of the developed method is demonstrated by comparing its results with those of 3D finite element analysis. The applications of the developed method to analyze five field test piles also show good agreement between the predictions and the experimental results. The developed method offers an alternative approach for simple and effective analysis of laterally loaded rigid piles in cohesive soil. Copyright © 2011 John Wiley & Sons, Ltd.