摘要
为解决饱和地基土承受大面积堆载作用时,会由于固结作用而逐渐沉降的问题.置于这种地基中的桩基础,受土的固结沉降作用会产生负摩擦力从而引起下拉载荷和轴向拉力.从桩-土作用机理出发,基于Terzaghi一维固结理论和单桩弹性微分方程,建立了横观各向同性地基在堆载作用下桩土相互作用关系表达式,并给出了其解析解和有限差分求解方法.理论计算结果与工程实测结果的比较分析表明:该方法能够反映堆载作用下单桩受力的主要特点,从而为工程实践提供了一个新的思路.
A settlement will be occurred while the ground is subjected to a large amount of overload. The negative fiction will be happened in the side of pile in the ground caused by the settlement. A differential equation for the pile in an inhomogeneous ground was deduced based on the model of pile-soil interaction. The changes of the settlements depth and time were obtained using the Terzaghi theory and layer-wise summation method. Then, the analytic solution of a pile in the homogenous ground was constructed. The case of an inhomogeneous ground was solved by the finite differential method. An example is presented to illustrate the usage of the solution.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2013年第12期1635-1638,共4页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金资助项目(51178290)
天津市自然科学基金资助项目(11JCYBJC02900)
关键词
堆载
单桩
沉降
有限差分法
固结
overload
single pile
settlement
finite differential method
consolidation
