Consolidation deformation induced by low frequency cyclic loads was investigated by finite element analysis (FEA) and some available test data. Both one-dimensional (1D) consolidation and the consolidation of a prefabricated vertical drain (PVD) unit cell were considered. With theoretical reasoning and using the results of FEA, it has been established that the amount and the rate of consolidation deformation induced by a continuous cyclic load with a maximum load increment of q, can be calculated using the consolidation result of a static load with a magnitude of q/2. Providing the compression increment (ΔS) near the drainage boundary where the effective stress increment is larger than q/2 is taking into account. The magnitude of ΔS is cyclic load frequency dependent and a method for evaluating it has been proposed. Further, it has been proposed that during the cyclic loading period, the creep deformation induced by sustained static load on a soil layer should be included into the total deformation. The proposed method was applied to two 1D and one PVD unit cell laboratory tests of cyclic load induced consolidations. Good agreement between the measured and the calculated settlement – time curves was obtained.

通过有限元分析（FEA）和一些可用的测试数据研究了低频循环载荷引起的固结变形。一维（1D）固结和预制垂直排水（PVD）晶​​胞的固结都被考虑了。通过理论推论和利用有限元分析的结果，可以确定，使用最大载荷增量为q的连续循环载荷引起的固结变形的量和速率可以使用静载荷为a的固结结果来计算。q / 2的大小。考虑到在有效应力增量大于q / 2的排水边界附近设置压缩增量（ΔS）。的大小ΔS与循环负载频率有关，并且已经提出了评估它的方法。此外，已经提出，在循环载荷期间，应将在土层上持续承受静载荷引起的蠕变变形包括在总变形中。所提出的方法应用于循环荷载引起的固结的两个一维和一个PVD晶胞实验室测试。在测量和计算的沉降－时间曲线之间获得了良好的一致性。