桩–土界面摩擦对静压桩挤土效应的影响分析  

INFLUENCE ANALYSIS OF FRICRION BETWEEN PILE AND SOIL ON COMPACTING EFFECTS OF JACKED PILE

作　　者：罗战友[1] 王伟堂[1] 刘薇[1] 

机构地区：[1]浙江科技学院土木工程系,浙江杭州310012

出　　处：《岩石力学与工程学报》2005年第18期3299-3304,共6页Chinese Journal of Rock Mechanics and Engineering

摘　　要：采用合适的土体屈服准则及有限变形理论,通过在桩–土界面设置接触以及在桩顶施加位移荷载建立了符合压桩实际的有限元模型。利用得到的有限元模型模拟了沉桩产生的挤土位移场,讨论了桩–土界面不同摩擦情况对沉桩产生位移场的影响。并对桩–土相互作用及水平向孔扩张的2种有限元模型进行了对比,结果表明,考虑桩–土相互作用及其摩擦情况是正确模拟静压桩挤土效应的关键。An appropriate finite element model was given according to the actual process of jacked pile. This model adopted the rational constitutive model of soil and finite deformation theory. Through pile-soil contact and displacement loading on pile top, the pile-sinking process was simulated. Displacement fields were studied through the finite element model. The effects of displacement fields caused by pile-soil friction were discussed. Then comparisons between pile-soil interacting model and cavity expanding model were made. The results show that the pile-soil interaction and interface fiction are important influential factors in the simulation of jacked pile.

关 键 词：土力学 静压桩 挤土效应 桩-土界面摩擦 数值模拟 

分 类 号：TU473[建筑科学—结构工程]