路堤荷载下基于上下桩径比的钉形水泥土双向搅拌桩承载机理研究

Study on bearing mechanism of T-shaped bidirectional soil-cement deep mixing pile under embankment loads

为了进一步研究和应用钉形水泥土双向搅拌桩复合地基地基处理技术,分析和探讨了上下桩径比的变化对桩体承载机理的影响。通过在不同上下桩径比试验桩体内埋设应变片,读取应变量并计算得到相应桩身各处的轴力值及侧摩阻力,而后对所得数据进行整理与研究。得出6点主要结论与建议,从而指导该法的设计与施工。

In order to deeply study and apply the technique of T-shaped bidirectional soil-cement deep mixing pile composite foundation.The influence of the change of up-under pile diameter ratio on the pile bearing mechanism was analyzed and discussed.By burying the strain pieces in different test piles and reading their datum,the axial stress and frictional resistance of column shaft were got via calculating.After collecting and researching these datum,six main conclusions and suggestion were abtained so as to guide design and construction.