This study investigated the change in monotonic and cyclic capacity of a plate anchor across different degrees of consolidation in dense sand. To quantify the effect of consolidation on anchor capacity, a framework is introduced and validated using centrifuge model anchor test data. The centrifuge tests considered a rectangular plate loaded at varying rates in dense sand, under both monotonic and irregular cyclic conditions, at a fixed embedment depth and with a horizontal load inclination (at the seabed). In order to vary from drained to undrained conditions, the sand was saturated using both water and a viscous pore fluid with viscosity approximately 700 times higher than water. The anchor's ultimate monotonic capacity in dense sand increased by up to 173% as the consolidation response evolved from drained to undrained with generation of dilation-induced suction. This increase in capacity across the consolidation regime can be adequately quantified using the proposed framework; however, uncertainty arises in achieving the theoretical undrained capacity. Both drained and undrained irregular cyclic loading resulted in anchor capacity increases of up to 33%, attributed to soil volume changes associated with cyclic densification under drained cyclic loading and excess pore pressure dissipation under undrained cyclic loading.

中文翻译：

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固结对砂土中板锚单调和循环承载力的影响

这项研究调查了板状锚的单调和循环承载力在致密砂土中不同固结程度的变化。为了量化固结对锚固能力的影响，引入了框架并使用离心模型锚固测试数据进行了验证。离心试验考虑了矩形板，该板在单调和不规则循环条件下，在固定的埋入深度和水平的负载倾斜度（​​在海床处）下，在致密的沙子中以不同的速率加载。为了在排水条件和不排水条件之间变化，使用水和粘度比水高约700倍的粘性孔隙流体将沙子浸透。锚点 随着固结响应从排水到不排水，随着扩张引起的吸力的产生，其在致密砂土中的极限单调能力提高了173％。可以使用提议的框架充分量化整个合并制度中这种能力的增加；然而，在实现理论上不排水的能力方面存在不确定性。排水和不排水的不规则循环荷载均导致锚固能力增加高达33％，这归因于排水循环荷载下与循环致密化相关的土壤体积变化以及不排水循环荷载下的过大孔隙压力耗散。