基于FLAC3D的城市高架桥缺陷桩基竖向承载性状分析

针对工程桩在施工过程中出现的常见的两种缺陷桩型，以合肥某高架工程中的桩基工程为背景，根据现场的工程勘察资料，运用FLAC3D软件进行数值模拟分析缺陷位置改变时，对单桩承载力性状的影响；以工程缺陷桩的桩顶沉降和桩身轴力分布曲线，分析缺陷工程桩桩顶的沉降规律及桩身轴力分布特征。结果表明，缺陷位于桩体不同位置其承载力受到影响具有一定规律性。

Analysis on Vertical Bearing Characteristics of Defective Pile Foundation of Urban Overpass Based on FLAC3D

In view of the common two kinds of defective piles in the construction process, this paper uses the FLAC3D software to analyze the influence of the defect position change on the bearing capacity characteristics of single pile according to the engineering survey data of a certain elevated project in Hefei. The pile top settlement rule of defective pile and the axial force distribution characteristics of the pile are analyzed based on the pile top settlement and pile axial force distribution curve. The results show that the bearing capacity of the pile is influenced and shows a certain regularity as a result of the defect located in different positions of the pile.