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Density and undrained shear strength of bed sediment from ND-CPT

机译：ND-CPT床层沉积物的密度和不排水剪切强度

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摘要

The density and the undrained shear strength (s u) of bed sediments at either side of the Isahaya Bay dike in the Ariake Sea, Japan, were investigated using nuclear density cone penetration tests (ND-CPTs). The nuclear density cone penetrometer (ND-CP) was operated from a boat, conducting 71 ND-CPTs. Furthermore, 26 undisturbed samples were obtained for soil density and s u measurements to calibrate the ND-CPT data. The results show that the density and s u obtained from in situ with the ND-CPTs agree well with those from the laboratory tests on undisturbed samples, and the obtained density profiles show good repeatability. The vertical variation in density and s u of the bed sediment can be obtained from the ND-CPT results. The relations between the density and s u show that s u increases with an increase in density, but that this relation is site specific. The values of s u show an exponentially growing trend and the values of log s u show a linearly increasing trend with density. The vertical distribution of the bed sediments can be described using the density values obtained with the ND-CPT.
机译：使用核密度锥渗透试验（ND-CPT）研究了日本有明海Isahaya Bay堤防两侧的床沉积物的密度和不排水的剪切强度（s u）。核密度锥形渗透仪（ND-CP）从船上操作，进行71枚ND-CPT。此外，获得了26个未扰动样品的土壤密度和s u测量值，以校准ND-CPT数据。结果表明，使用ND-CPT原位获得的密度和su与未受干扰样品的实验室测试的密度和su吻合良好，并且所获得的密度曲线显示出良好的可重复性。可以从ND-CPT结果获得床沉积物的密度和su的垂直变化。密度与s u之间的关系表明s u随着密度的增加而增加，但是这种关系是特定于地点的。 s u的值显示出指数增长趋势，log s u的值显示随着密度线性增长趋势。可以使用ND-CPT获得的密度值描述床沉积物的垂直分布。

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