https://www.jstage.jst.go.jp/article/sandf/48/3/48_3_353/_pdf

Effect of slope on p-y curves due to surcharge load :

The Paper presents the results of a systematic parametric investigation of the static and dynamic response of single free-head piles embedded in a soil stratum, the modulus of which increases linearly with depth. The study is conducted by means of a dynamic finite-element formulation which accounts for the three-dimensionality of soil deformation while properly reproducing the radiation damping characteristics of the system. The soil is modelled as a linear hysteretic continuum and the excitation consists of a sinusoidally time-varying horizontal force or moment, applied at the pile head. Comprehensive plots of the results are presented in non-dimensional form, for a wide range of the most significant dimensionless groups of problem parameters. For the response of flexible piles, in particular, simple algebraic expressions are developed in terms of the ratio E,/E,, of the pile and soil moduli. These expressions, being valid for several values of Poisson’s ratios of the soil, compare favourably with results from previous studies and are expected to be useful in practical design calculations.

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Static and dynamic lateral deflexion of piles in non-homogeneous soil stratum

Eighteen lateral loading tests were conducted on large-scale steel piles to establish the lateral behaviour of tapered piles in cohesionless soil. Three piles 1.52 m in length with different taper ...

Response of tapered piles subjected to lateral loading

Piles have been extensively used for supporting axial loads and lateral loads for variety of structures including high rise buildings, transmission towers, power stations, offshore structures and highway and railway structures. Many transmission towers, high rise buildings and highway and railway bridges are constructed near steep slopes which are supported by pile foundations. These structures may be subjected to large lateral loads such as strong winds or earthquakes. When piles are constructed in sloping ground, the behaviour of piles under lateral load is different from piles in horizontal ground. The present investigation is to study the behaviour of piles on sloping ground under lateral loads. A series of laboratory model test had been carried out on the instrumented pile on horizontal ground, 1V: 2H slope and 1V: 1.5H slope with the relative density of sand at 30%, 45% and 70% and varying embedment length to diameter ratio of 25, 30, and 35. From the experimental results, the behaviour of t...

Experimental investigation on single model pile in sloping ground under lateral load

This paper presents the results of static lateral-load test carried out on a single aluminium model pile embedded in soft clay (consistency index, Ic = 0.42) on a sloping ground. A series of laboratory model tests had been carried out on the instrumented aluminium pile with outer diameter of 25.46 mm on a sloping ground of varying slopes (1V:1H, 1V:1.5H, 1V:2H, 1V:3H and 1V:5H) and with varying embedment length-to-diameter ratio (L/D) of 20, 25 and 30. To quantify the effect of slopes, the tests were also carried out on a horizontal ground surface. From the experimental results, the lateral load-carrying capacity of the pile, load–deflection response of the pile at pile head, effect of slopes and embedment length on pile capacity and bending-moment profile along the pile shaft were studied. The experimental results have been compared with those obtained from finite element analysis PLAXIS 3D and found to be in good agreement.

Response of laterally loaded pile in soft clay on sloping ground

Quantitative estimates of the various soil-pile parameters on lateral pile head displacement, rotation and moment coefficients are presented in dimensionless terms through graphs. The results provide guidelines to predict the lateral response of free-head piles. The illustrative example highlights the utility of the results. These results can also be used to predict the responses of partially restrained head piles.

Prabhakar J. Pise

Papers

Lateral Response of Free‐Head Pile