This paper presents the assessment of consolidation and creep settlements of an isolated circular footing supported on soft clay samples reinforced with a single granular column. Clay samples (300 mm dia., 400 mm high) were formed from reconstituted kaolin and remoulded sleech (exhibiting significant creep). These samples were tested using chambers with various features to capture the settlement under constant foundation loading. In one model, the footing (70 mm dia.) was supported by a 40 mm dia. granular column formed by crushed basalt. The footings, with and without a granular column, were subjected to five vertical loading increments: 60, 120, 180, 240 and 300 kPa in the case of kaolin. In the case of sleech, vertical loading increments were: 60, 120 and 180 kPa. Each test lasted approximately ten months. In the case of kaolin, the settlement reduction factor was marginal, although it was considerably better for sleech. Kaolin exhibited marginal creep settlement under low to moderate bearing pressure, which increased substantially under high bearing pressures. Creep settlement was more prominent in sleech at all levels of bearing pressures. The very interesting finding from the investigation is that the settlement reduction factors due to consolidation and creep are similar in order under low to moderate loadings.

中文翻译：

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颗粒荷载作用下软黏土在独立荷载下的初始，初次和二次固结响应

本文介绍了用单个颗粒柱加固的软黏土样品上支撑的孤立圆形基础的固结和蠕变沉降的评估。粘土样品（直径300毫米，高400毫米）是由重构的高岭土和模制的板条（表现出明显的蠕变）形成的。使用具有各种功能的腔室对这些样品进行了测试，以在恒定的地基载荷下捕获沉降。在一个模型中，底座（直径70毫米）由40毫米直径支撑。由破碎的玄武岩形成的粒状柱。具有和不具有颗粒柱的基础都承受了五个垂直载荷增量：对于高岭土，为60、120、180、240和300 kPa。对于转向声，垂直载荷增量为：60、120和180 kPa。每次测试大约持续十个月。如果是高岭土，减少沉降的系数很小，尽管对于雨披来说要好得多。高岭土在低至中等轴承压力下表现出边缘蠕变沉降，在高轴承压力下显着增加。在各种水平的压力下，蠕变沉降在sleech中更为突出。从调查中得出的非常有趣的发现是，由于固结和蠕变导致的沉降减少因子在低至中等载荷下的顺序相似。