【摘要】 为得到小直径开口钢管桩的沉桩阻力计算公式,对开口钢管桩的土塞效应、挤土效应和软化效应进行了分析,结合静力触探原理,提出了沉桩阻力计算公式,将沉桩过程分为土塞闭合前后两个阶段,分别计算了桩侧阻力和桩端阻力的拟合系数,得到了小直径开口钢管桩的两阶段沉桩阻力计算公式。与工程实际测试数据符合较好。结果为黄河冲积平原粉土土质的坑式钢管静压桩提供了工程参考。更多还原

【Abstract】 To get the pile-sinking resistance calculation formula of small aperture opening steel pipe pile,the plugging effect,squeezing effect and strain softening effect of open ended steel pipe pile are analyzed.The pile-sinking resistance formula is proposed combined with cone penetration test,the pile-sinking process is divided into two stages:before and after inner soil blocked,and the fitting coefficients of pile side resistance and pile tip resistance are calculated respectively,and the two stages pile-sinking resistance calculation formula of small aperture opening steel pipe pile is obtained.The results fit the test dates in engineering well.The research results can provide reference to pit-jacked steel pipe pile in Huanghe alluvial plain silt soil.更多还原