摘要
针对管桩基础的承载机理,采用传递函数法建立了管桩基础的承载力简化计算模型;管桩对桩侧土体的挤密强化作用通过对桩侧土体的等效刚度系数k值的修正进行考虑;对承载力的计算采用迭代法,避免了因极限位移所在点深度位置在桩身竖向位移函数被求解前无法得知而造成的求解矛盾。最后将理论计算结果与实际工程静载试验数据进行对比分析,表明本简化计算模型对于工程应用具有较高的可靠性,能够满足设计工程师对单桩承载力特征值确定的要求。同时对计算模型的误差原因进行了讨论。
Based on load-bearing mechanism of precast concrete pile, a simple calculational model of bearing capacity of precast concrete pile is advanced by imitating the transferring-function method. Meanwhile, because precast concrete pile can strength nearby soil during construction, so stiffness coefficient of soil spring is modified in calculational formula. Calculational formula is solved by using iteration method in order to solve the problem that is caused by the unknown parameter. Lastly, comparison of bearing capacity theoretical calculation and static load experiment data proves this simple calculational model is dependable, and the designer can use it to find out the bearing capacity of precast concrete pile.
出处
《广州建筑》
2008年第5期6-10,共5页
GUANGZHOU ARCHITECTURE
关键词
管桩基础
承载力
简化计算模型
对比分析
precast concrete pile
bearing capacity
simple calculational model
comparison analysis
