大直径超长桩竖向承载性状的数值模拟  

Numerical simulation for vertical bearing behavior of large-diameter ultra-length pile

作　　者：陈永发 CHEN Yongfa

机构地区：[1]福建八闽岩土工程有限公司,福建福州350001

出　　处：《福建建设科技》2021年第2期25-27,共3页Fujian Construction Science & Technology

摘　　要：大直径超长桩的荷载传递机理、变形规律复杂,对其承载性状进行深入研究具有理论及实际意义。本文依托某大直径超长桩实际工程,将实例中多层地基土层简化为较好持力层及其上覆土层两层,利用快速拉格朗日有限差分软件FLAC3D,对大直径超长桩进入持力层与否两种工况的承载性状分别进行了模拟分析比较,获得了桩基竖向荷载-沉降曲线,计算结果与实测结果吻合良好。研究结果对大直径超长桩的合理设计具有一定的参考价值。The finite difference program FLAC3D for Fast Lagrangian Analysis of Continuum was used to simulate and compute the vertical load-settlement curve of large-diameter over-length pile,whose result is coincide well with the measurement.Then the multi-layer soil case was simplified to preferable bearing layer and cover soil layer,and the bearing behavior of piles which embed to bearing layer and not embed were simulated,analyzed and compared respectively,some useful conclusions were obtained,and could be references to design calculations of piles.

关 键 词：大直径超长桩 竖向承载 快速拉格朗日有限差分 数值分析 持力层 

分 类 号：TU473.1[建筑科学—结构工程]