中文摘要：

通过饱和砂土中模型桩在单向循环荷载比（循环荷载幅值与桩的极限承载力的比值）分别为12.5%,25%,50%三种情况下的沉降试验,研究了模型桩在不同动力循环加载情况下的桩顶累积沉降和动位移幅值随振动次数的变化而改变的规律,拟合了沉降试验曲线的回归方程。对试验结果进行分析后得出：循环荷载比和循环次数是影响饱和砂土中单桩桩顶累积沉降的主要因素。

英文摘要：

This paper focuses on the model pile settlements induced by different cyclic loading ratios in saturated sand. The cyclic loading ratio is defined as the ratio of the maximum cyclic loading to the ultimate bearing capacity of the pile. Through three kinds of tests on model piles with the cyclic loading ratio of 12.5%, 25% and 50%, the cumulative settlements of the model piles are studied in saturated sand, and it is investigated that how the dynamic displacements change with cyclic numbers Then the fitting equations of the settlement curves are derived from the test data. The results show that the cyclic loading ratio and cyclic number are the important factors of the cumulative settlement of piles.