变截面CFG桩受力性能研究

Study on mechanical properties of CFG pile

随着变截面CFG桩在工程领域中的广泛应用,研究其力学性能具有重要的理论与实践意义。探讨了变截面CFG桩的下部桩径对其力学性能的影响,特别是变截面CFG桩在不同桩径下的力学响应。利用ABAQUS有限元软件建立变截面CFG桩-土体整体有限元模型,针对直径分别为1.2 m,1.4 m和1.6 m的变截面CFG桩,在相同的上拔荷载、水平荷载和下压荷载条件下,分析了其力学响应。研究结果表明,随着小桩直径的增加,变截面CFG桩的最大应力和最大位移均呈现逐渐减小的趋势,且应力集中现象主要发生在上部较大桩体区域。该研究为变截面CFG桩的设计与施工提供了理论依据,并有助于提高其在复杂地质条件下的承载能力和稳定性,具有显著的工程应用价值。

With the widespread application of variable cross-section CFG piles in the engineering field,studying their mechanical properties has significant theoretical and practical implications.This paper aims to explore the impact of the lower pile diameter of variable cross-section CFG piles on their mechanical properties,particularly the mechanical response of variable cross-section CFG piles under different pile diameters.Using the ABAQUS finite element software,an overall finite element model of the variable cross-section CFG pile-soil system was established.For variable cross-section CFG piles with diameters of 1.2 m,1.4 m,and 1.6 m,the mechanical responses under the same uplift load,horizontal load,and downward load conditions were analyzed.The research results show that as the smaller pile diameter increases,the maximum stress and maximum displacement of the variable cross-section CFG pile gradually decrease,and the stress concentration mainly occurs in the upper larger pile area.This study provides a theoretical basis for the design and construction of variable cross-section CFG piles and helps improve their bearing capacity and stability under complex geological conditions,having significant engineering application value.