Development of a Piezocone for Use in Centrifuge Testing and Validation of Methods for Interpreting Cone Penetration Data

本研究的目的是在离心机中对准备好的土样进行压电触探试验，以获得一定的强度和刚度分布。圆锥贯入试验的结果可以与常规三轴试验测得的参比土性质进行比较，这些试件要么是在与离心机土样相同的条件下制备的，要么是在贯入试验后通过取心获得的。此外，由于土的不排水抗剪强度不是一个唯一的参数，而且取决于测量它的试验类型，因此本研究将采用剪切叶片测得的不排水抗剪强度作为参考。因此，在对离心机试件进行圆锥贯入试验的同时，可以利用微型剪切叶片测量试件的不排水剪切强度分布，从而可以直接比较圆锥贯入阻力和剪切强度的分布。

The objective of this research is to conduct piezocone penetration tests in the centrifuge on soil samples which are prepared to achieve certain strength and stiffness profiles. The results of cone penetration tests can be compared with the reference soil properties which are measured by conventional triaxial testing on specimens that are either prepared to the same conditions as the centrifuge soil sample, or are obtained by coring from the centrifuge sample after the penetration test. In addition, since the undrained shear strength of soil is not a unique parameter and depends on the type of test used to measure it, it will be adopted that the undrained shear strength measured by the shear vane will be used as the reference in this research. Thus, simultaneously with cone penetration tests on a centrifuge sample, the undrained shear strength profile of the sample will be measured by means of a miniature shear vane, so that the profiles of cone penetration resistance and of shear strength can be compared directly.