Abstract

This paper presented trilinear load transfer models for both pile shaft-–soil system and pile tip-soil system to analyze the load–settlement relationship of bored pile in loess area. Based on the differential equation of load transfer, the load transfer functions in different stages were deduced. Furthermore, combined with the trilinear model of pile tip-soil system, the load-settlement functions were obtained and the calculation method was completed. A static load test for a single pile was then carried out to obtain the required pile-soil system parameters, and the calculated results were presented and compared to those of the static load test, proving the feasibility of the proposed method. Moreover, the influence of each pile-soil system parameters on the load–settlement relationship of single pile was studied, and the results provide guidance for the pile foundation engineering in loess area.

摘要

本文提出了黄土区钻孔桩-土体系和桩-端土体系的三线性荷载传递模型，以分析钻孔桩的荷载-沉降关系。基于载荷传递的微分方程，推导了不同阶段的载荷传递函数。此外，结合桩端-土系统的三线性模型，获得了荷载-沉降函数，并完成了计算方法。然后进行单桩静载荷试验，获得所需的桩-土系统参数，并将计算结果与静载荷试验的结果进行比较，证明了该方法的可行性。此外，研究了每个桩土系统参数对单桩荷载-沉降关系的影响，