Abstract
In this paper, a method is developed for nonlinear analysis of laterally loaded long‐flexible pile near undrained clay slope. The ideal elastic‐plastic p‐y curve model is used as the basic calculation model to study the pile‐soil interaction system. To consider the slope effect on the soil resistance along with pile length, related reduction function expressions of soil resistance are selected by assessing the existing methods. A finite difference iteration scheme is proposed to solve the pile’s deflection curve equations to obtain nonlinear response of pile. The developed method is validated by comparing its results with the existing method, which shows a good agreement. A number of parameters analyses are carried out, and effects of different influence factors on laterally loaded pile are further discussed.
Highlights
Pile foundations are widely used to support structures such as bridges, high-rise buildings, transmission line towers, and traffic signs that are frequently constructed near or in a natural or man-made slope [1]. e pile foundations are often subjected to static lateral loading in many cases
For the design needs of pile foundations, many scholars have conducted a lot of research on laterally loaded piles in horizontal ground. e most commonly used theoretical method for laterally loaded pile in the current design approach is the well-known subgrade reaction method, which considers the pile as a beam supported by a series of nonlinear soil springs. e lateral load transfer curves (i.e., p-y curves) are often used to describe the loaddeformation characteristics of nonlinear soil springs
Different criteria for developing p-y curves under many cases, including soil types, soil strength, loading conditions, pore water pressure conditions in soil, etc., have been proposed by several investigators (Matlock [2], Reese et al [3, 4], Reese and Welch [5], Gabr et al [6], Fan and Long [7], and some others) mainly through the back analyses of lateral load tests, and these typical p-y curves have been incorporated into the API specification as a reference for the design of pile foundation structure in offshore engineering [8]
Summary
Pile foundations are widely used to support structures such as bridges, high-rise buildings, transmission line towers, and traffic signs that are frequently constructed near or in a natural or man-made slope [1]. e pile foundations are often subjected to static lateral loading in many cases. Wang et al [9, 10] proposed a new p-y curve method of laterally loaded pile in clay based on the analyses and calculation of the existing field test data through the stress-strain relationship. Zhou et al [13] proposed a new empirical formula for the p-y curves of ultralong PHC pipe piles in soft clay based on the analyses of the relationship between ultimate soil resistance and some geotechnical parameters from lateral pile load test. Us, the existing theoretical calculation methods for laterally loaded pile in horizontal ground are not suitable for pile near slopes. To validate the developed method, it is rst compared to pile test and three-dimensional numerical nite element analysis results, and the results show that the developed method can provide satisfactory prediction of the response of laterally loaded pile near clay slopes. To validate the developed method, it is rst compared to pile test and three-dimensional numerical nite element analysis results, and the results show that the developed method can provide satisfactory prediction of the response of laterally loaded pile near clay slopes. en, it is applied to analyze the parametric in uence law, and the nonlinear response results of pile near clay slope under di erent in uence factors are obtained
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