Abstract

The lateral deformation behaviour of inclined piles in calcareous sand is investigated with model testing and numerical analysis. A model pile is instrumented with quasi-distributed strain sensors and installed in calcareous sand with various inclination angles. The lateral deformation, bending moment and shear force of the pile are analysed by investigating the effect of the inclination angle and embedded depth. The experimental results of piles with inclination angles of −30°, 0° and 30° are analysed. A random finite element method (RFEM) is established to investigate the effect of the pile inclination. A single exponential function is used to characterize the spatial autocorrelation of soil parameters. A random field is obtained by the Cholesky method. The RFEM is verified with experimental results and used to further analyse the lateral deformation behaviour. The results indicate that both of the orthogonal maximum influence distances from the pile centre have a linear relationship with the pile inclination. A linear relationship between the maximum lateral deformation on the pile top and the pile inclination is proposed. The outcome of this study may be helpful for understanding the lateral deformation behaviour of piles in calcareous sand and designing inclined piles.

摘要

通过模型试验和数值分析研究了倾斜桩在钙质砂中的横向变形行为。模型桩配备准分布式应变传感器并安装在不同倾角的钙质砂中。通过研究倾角和埋深的影响，分析了桩的横向变形、弯矩和剪力。分析了倾角为-30°、0°和30°的桩的试验结果。建立了随机有限元法（RFEM）来研究桩倾斜的影响。单个指数函数用于表征土壤参数的空间自相关。通过 Cholesky 方法获得一个随机场。RFEM 通过实验结果进行了验证，并用于进一步分析横向变形行为。结果表明，两个正交最大影响距桩中心的距离都与桩倾角呈线性关系。提出了桩顶最大横向变形与桩倾角之间的线性关系。本研究结果可能有助于了解桩在钙质砂中的横向变形行为和设计倾斜桩。