摘要
软土地基中,桩周土与基桩的能量传递模式决定了基桩负摩阻力的产生过程。首先,应用剪切位移法将桩周土位移分解成弹性位移与塑性位移;然后根据不同桩周土的位移模式确定桩周土与基桩的能量传递模式;进而推导出多层软土地基中桩周土与基桩的能量平衡方程;从而计算出不同深度基桩的位移与负摩阻力值。最后,通过对工程实例的计算表明:文中方法所得结果与实测数据基本相符,可为相关工程的设计提供辅助资料。
In several layers soft clay ground,the course of producing negative friction is decided by energy transmission model of soil and pile.Firstly,shear displacement method is applied to calculate elastic displacement and plastic displacement,then,different energy transmission models are decided by different displacement models of the soil around the pile,furthermore,energy balance equations of the soil and the pile are derived,thus,the displacement and the negative friction value of the pile in different depths are calculated.Finally,a calculation of engineering example shows that the calculating results are substantial agreement with in-situ data,and can provide consultations to the pile engineering design.
出处
《建筑科学》
北大核心
2009年第3期54-57,53,共5页
Building Science
关键词
地基基础
基桩
负摩阻力
剪切位移
能量平衡
foundation
pile
negative friction
shear displacement
energy balance
