摘要
为了解决扩底桩深基础与普通桩基及浅基础的区分及设计计算,根据均布荷载下的Boussinesq与Mindlin解,结合现有文献对"扩底桩"或"扩底墩"等扩底深基础进行界定,对其承载能力特性进行计算分析.结果表明:扩底深基础与普通桩基的区别是扩大头因素的存在.通过对不同形式基础底部附加应力的计算可知,若以两者差异δ=0.2为基准对扩底基础的深浅进行界定,则埋深与扩底直径之比宜取0.62,并将其作为深浅基础的划分界限,而且实际工程亦验证了此界限的可靠性.
Based on the analytical solution of Boussinesq and Mindlin,this paper calculates the bearing capacities of belled piles according to the bearing capacity of pile groups and shallow foundations.The main difference between belled pile and shallow foundation is the enlarged base.Compared with the different results of additional stress for belled piles and piles foundation,the definition line between shallow and deep foundation is δ=0.2.This means that a deep foundation is defined if the buried depth is greater than 0.62 times of its bottom diameter.This is also verified in engineering practices.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2012年第4期531-535,共5页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金资助项目(50878155/E080602)
关键词
深基础
浅基础
扩底桩
端阻力界定
扩径比
桩基
压缩
承载力
deep foundation
shallow foundation
belled piles
definition of tip resistance
ratio of enlarged tip diameter to shaft
compression
bearing capacity
