中文摘要：

利用自制的群桩模型装置,在湛江组结构性黏土中进行原位试验,获得不同桩间距、不同桩长情况下群桩效应系数实测值;对比分析了不同理论群桩效应系数公式计算值与实测值的误差;讨论了不同理论群桩效应系数公式的适用性。结果表明：承载力群桩效应系数实测数随桩间距增大而增大,在0.750～0.917变化;侧摩阻力群桩效应系数随桩间距增大而增大,在0.782～0.897变化;Converse-Labrre群桩效应系数计算值与实测数据比较吻合,相对误差在-1.9%～6%;考虑应力叠加的群桩效应系数计算值与实测值相差较大。

英文摘要：

Based on the homemade pile groups model,the test in situ from Zhanjiang Formation structural clay was carried out to get the pile group effect coefficient values measured under various pile spacing and different circumstances pile length.The different pile group effect coefficient and calculated values were contrasted and analyzed,and the error was found from them.The applicability of different theories pile group effect coefficient formula was discussed.The results show that with the pile spacing increasing,bearing capacity of pile group effect coefficient increases between 0.750-0.917.With the pile spacing increasing,side friction pile group effect coefficient increases between 0.782-0.897.Converse-Labrre pile group effect coefficient calculated values agree well with the measured data,and the relative error varies between -1.9%-6%.The calculated pile group effect coefficients considering the superposition of sterss are quite different with the measured values.