Evaluation of Microscopic Behaviour for Clay by Using Micro-indenter and its Application

在这项研究中，通过微压痕试验确定的剪切强度进行了检查，侧重于定量评价粘土的微观力学行为。通过对粘土试样的微压痕试验和无侧限压缩试验所得粘聚力的比较，发现循环加载的微压痕试验结果低估了粘聚力，而单调加载的微压痕试验结果则准确地估算了粘聚力。由于强度受速率效应的影响，应根据土样选择加载速率。从这些结果中，它被发现，粘土的微观力学行为可以通过微压痕试验来评估。

In this study, the shear strength determined by a micro indentation test was examined focusing on the quantitative evaluation of the micro-scale mechanical behaviour of clay. The comparison of the cohesion obtained from the micro indentation test and unconfined compression test for clay samples indicated in the micro indentation test results by cyclic loading underestimate the cohesion while those by monotonic loading estimate the cohesion accurately. It is noted that the loading rate should be selected according to the clay sample because strength is affected by the rate effect. From these results, it was found that the microscopic mechanical behaviour of clay can be evaluated by mean of the micro indentation test.