负摩擦作用下PCC桩沉降计算  

Calculation of settlement of PCC pile subjected to negative skin friction

作　　者：刘汉龙[1] 张晓健[1] 

机构地区：[1]河海大学岩土工程研究所,南京210098

出　　处：《岩土力学》2007年第7期1483-1486,共4页Rock and Soil Mechanics

摘　　要：从桩-土相互作用的机制出发,建立了均质地基中PCC桩负摩阻力传递的弹性微分方程。提出了基于有限差分法的一种桩身位移的迭代算法,计算结果表明,该计算方法收敛性好,且符合实际情况。根据中性点定义得出其位置在桩身中下部,与以往的研究结果相吻合。结果还表明,PCC桩比等截面的实心桩有较小的沉降。Based on mechanism of pile-soil interaction, the elastic differential equation of negative skin friction in homogeneous ground is established. An iterative procedure on the basis of finite differential method to calculate displacement of a pile body is proposed. The computing results indicate that the procedure given in this paper is of good convergence and well coincident with reality. The neutral point appears below the pile body according to its definition, showing the agreement with the previous conclusions. The results also show that PCC pile has a small settlement compared with the solid pile of equal cross section area.

关 键 词：负摩阻力 有限差分法 迭代 中性点 

分 类 号：TU413[建筑科学—岩土工程]