CFG桩复合地基承载力经验公式的修正及应用

对CFG桩复合地基在水平和竖向荷载作用下桩、土的受力进行了分析.在经验公式的基础上,考虑了边载对承载力的影响,推导出CFG桩复合地基承载力修正公式,并利用该修正公式计算了某泵站基坑的CFG桩复合地基承载力.计算结果与静载荷试验结果比较表明,该修正公式能准确反映地基承载力的大小.

Modification of empirical formula for bearing capacity of CFG pile composite foundation and its application

An analysis was made of the interaction between piles and soil of CFG pile composite foundation under actions of horizontal loads and vertical loads,and the functions of cushions were expatiated.In consideration of the influences of side loads on the bearing capacity of the foundation,a modified formula for the bearing capacity of CFG pile composite foundation was derived based on the empirical formula,and the formula was applied to a foundation pit strengthening project reinforced with CFG piles at a pumping station.The comparison of the calculated result with the experimental data from static loading tests shows that the modified formula can reflect the bearing capacity of the composite foundation with reasonable accuracy.