Analysis of Laterally Loaded Piles in Undrained Clay Concave Slope

Chong Jiang,Xintai Li,Pan Liu,Li Pang,Yu Wang

doi:10.1155/2021/8580748

Abstract

A concave slope is a common type of slope. This paper proposes a simplified method to study the effect of a clay concave slope on laterally loaded piles. The hyperbolic p - y curve model is selected as the lateral pile-soil interaction model of the concave slope. Considering the two angles of the concave slope, the variation of the ultimate soil resistance with depth is divided into two parts, and the ultimate soil resistance varies nonlinearly with depth. The reduction factor method and normalization method are used to obtain the initial stiffness. The theoretical results will be compared with the calculation results of the 3D FE analysis to prove the rationality of this method. Finally, the simplified method is used to analyze the response of laterally loaded piles under different parameters.

Highlights

Pile foundation is one of the most commonly used foundations in bridge engineering, offshore drillings, and offshore wind turbines
Case 3 carries out a verification between the theoretical ultimate soil resistance and the results of 3D FE analysis under different angles and heights
This paper has proposed the p-y curve which is suitable for a concave slope, and the lateral response of a pile has been studied

Summary

Introduction

Pile foundation is one of the most commonly used foundations in bridge engineering, offshore drillings, and offshore wind turbines. The existing p-y curves of sloping ground can only consider the change law of ultimate soil resistance and initial stiffness under a single angle. It leads to errors in the analysis of the horizontal bearing characteristics of piles using the existing p-y curve. This paper focuses on giving a nonlinear analysis method considering the bearing characteristics of the laterally loaded pile in concave sloping ground. In this method, the pile-soil interaction model adopts the hyperbolic p-y curve model. This article discusses the influence of the different slope angles and upper slope height and obtains the response law of piles under the influence of different parameters

Establish a p-y Curve of Clay Concave Slope

Approach Verification

Parameter Analysis

Findings

Conclusion