承台对单桩水平承载力影响的数值模拟分析

Numerical simulation analysis of effect of pile cap on lateral capacity of single pile

桩的水平承载力问题研究中通常忽略承台作用,传统理论分析方法难以考虑承台对单桩水平承载力的贡献,给分析结果造成较大的误差.而现场静载荷试验需要花费大量的时间和经费,已有试验资料较少,承台和桩一起试验的资料更少,难以分析承台对单桩水平承载力的影响程度.笔者采用ABAQUS大型有限元软件,对粘性土中水平受荷桩进行模拟,分析了承台面积大小、承台埋深以及垂直荷载对弹性长桩水平承载力的影响情况,得出了一些有价值的结果和结论.

In the research of pile＇s lateral capacity, the effects of pile cap are usually neglected to make the problem simplified. Traditional analytical methods can not calculate the contribution of pile cap to pile lateral capacity, so the result error is obvious. Site tests need a lot of time and money, the datum are not many, even few the test of pile with cap which we need to analyze the effects of cap. By using the ABAQUS finite element software to simulate the elastic long single pile with or without cap in clayey soil subject to lateral load, the influence of cap area, embeded depth and vertical load are analyzed in the paper, some valuable results and conclusions are obtained.