钻孔变截面灌注桩的荷载传递特性  

Load transfer performance of the variational section bored pile

作　　者：杨有莲[1] 朱俊高[1] 

机构地区：[1]河海大学岩土工程科学研究所,江苏南京210098

出　　处：《煤田地质与勘探》2008年第1期49-52,共4页Coal Geology & Exploration

摘　　要：以某一工程钻孔变截面灌注试桩为例,采用三维有限元分析方法,研究了相同土质条件下,变截面桩和等截面桩在竖向桩顶加载方式下荷载传递机理的异同;并通过引入相对摩阻力Rτ,进一步分析了桩型对桩侧摩阻力发挥程度的影响。结果显示:相对摩阻力Rτ等于1.0,表明桩侧摩阻力充分发挥;相对摩阻力Rτ大于1.0,表明桩侧摩阻力表现为强化现象;相对摩阻力Rτ小于1.0,则桩侧摩阻力表现为软化现象。Based on an example of a variational section bored pile, numerical simulation of its load transfer performance of that variational section and equal section single-pile sustain top-pile load under same soil conditions are carried with 3D FEM. The effect of pile styles are discussed, by introducing relative soil friction Rτ for explaining the exertion degree of soil friction. The resuits indicated that if Rτ = 1.0, soil friction brings into full play; if Rτ 〉 1.0, the soil friction represents consolidation phenomena; if Rτ 〈 1.0, it indicates that soil friction represents intenerating phenomena.

关 键 词：变截面桩 荷载传递性状 有限元 相对摩阻力 

分 类 号：TU473[建筑科学—结构工程]