深厚松散地基灌注桩荷载传递与承载特性数值分析  

Numerical analysis of load transfer and bearing characteristics of cast-in-place piles in deep and loose foundation

作　　者：王兴 Wang Xing(China Railway 24th Bureau Group Anhui Engineering Co.,Ltd.,Hefei Anhui 230011,China)

机构地区：[1]中铁二十四局集团安徽工程有限公司,安徽合肥230011

出　　处：《山西建筑》2025年第6期74-77,共4页Shanxi Architecture

基　　金：安徽省公益性地质工作项目(项目编号:2015-g-13)。

摘　　要：采用COMSOL Multiphysics数值模拟技术,针对深厚松散粉土-砂土地基上的灌注桩进行了荷载传递规律与承载力的系统分析。基于安徽省固镇县上跨京沪铁路立交桥工程建立数值模型,研究不同荷载条件下桩基沉降和周围土体变形变化规律,并评估了该桩基的极限承载力。研究结果表明:桩顶沉降随荷载增大呈现非线性增长,土层强度的不均对应力传递有显著影响,该灌注桩的极限承载力为9000 kN。The COMSOL numerical simulation method is used to systematically analyze the load transfer law and bearing capacity of cast-in-place piles on thick loose silt-sand foundation.A numerical model was established based on the overpass project over the Beijing-Shanghai Railway in Guzhen County,Anhui Province.The settlement of the pile foundation and the deformation of the surrounding soil under different load conditions were studied,and the ultimate bearing capacity of the pile foundation was evaluated.The research results show that the settlement of pile top increases nonlinearly with the increase of load,the uneven strength of soil layer has a significant impact on stress transfer,and the ultimate bearing capacity of the bored pile is 9000 kN.

关 键 词：灌注桩 荷载传递 承载力 数值分析 

分 类 号：TU411[建筑科学—岩土工程]