大直径超长桩承载特性研究  

Study on Bearing Characteristics of Large Diameter Ultra-Long Piles

作　　者：张政 

机构地区：[1]中国铁路上海局集团有限公司合肥铁路枢纽工程建设指挥部,安徽 合肥

出　　处：《土木工程》2023年第12期1448-1454,共7页Hans Journal of Civil Engineering

摘　　要：随着我国经济的蓬勃发展,各个行业的大型工程络绎不绝,这对于桩基础的承载力又提出了新的要求,桩基础朝着大直径、超长桩身发展。以某桥梁大直径超长钻孔灌注桩为工程背景,基于ABAQUS有限元数值模拟软件建立桩的数值模型,设置了13级不同的桩顶荷载,揭示大直径长桩的承载特性,得到该桩桩顶荷载-沉降曲线,并计算该桩的极限承载力。分析桩侧摩阻力分布曲线和桩顶、桩身和桩端在不同荷载下的轴力曲线,得到大直径长桩的荷载传递规律。With the vigorous development of China’s economy, large-scale projects in various industries are endless, which puts forward new requirements for the bearing capacity of pile foundations, and pile foundations develop towards large diameter and ultra-long piles. Taking the large-diameter super-long bored piles of a bridge as the engineering background, the numerical model of the pile is established based on ABAQUS finite element numerical simulation software, and 13 levels of different pile top loads are set to reveal the bearing characteristics of the large-diameter long piles, to obtain the load-settlement curve of the top of the pile, and to calculate the ultimate bearing capacity of the pile. The distribution curve of pile lateral resistance and the axial force curves of pile top, pile body and pile end under different loads are analyzed to obtain the load transfer law of large diameter long pile.

关 键 词：大直径桩 承载特性 荷载传递 数值模拟 

分 类 号：TU7[建筑科学—建筑技术科学]