中文摘要：

在采用三维数值模拟法对一群桩试验模型进行分析对比基础上,建立了与实际工程中相近的低承台群桩模型,用数值模拟手段揭示了在上部荷载作用下群桩的荷载-沉降特性,并对群桩基础荷载-沉降曲线的影响因素分别进行了分析与探讨.结果表明：桩长（长细比）、桩距（距径比）、桩土剪切弹簧刚度、桩端土刚度、承台刚度及其设置方式对群桩荷载-沉降曲线影响较大,而桩身刚度的影响不明显.

英文摘要：

Based on the analysis and comparison of a pile group testing model using numerical simulation in 3-dimension,a pile group with embedded cap are modeled,and the load-settlement property of the pile groups under vertical load are revealed by numerical simulation method,and the influence factors on load-settlement curves of pile group foundation are analyzed,which indicates that pile length（ratio of length to diameter）,pile spacing（ratio of spacing to diameter）,shear spring stiffness between pile and soil,stiffness of soil at the pile end, pile cap stiffness and the setting type of pile cap affect the curves obviously, while pile stiffness affects little.