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发表时间：2022-10-10

发表刊物：大连理工大学学报

期号：1

页面范围：7-11

ISSN号：1000-8608

摘要：According to the undisturbed frozen soil not vibrated and the microcosmic structure inside not changed, compared with the remolding soil in laboratory, a new experimental research on the fracture toughness of the undisturbed frozen soil is presented. The bend test stand is improved. The pre-crack methods and coloring technology to measure the crack size in the rock crack are adopted. With the observation of the layering frost heave of the local frozen soil, the relations of frost heave, melt and time are obtained in different deep soil layers, so that temperature can be controlled in the experiment. The fracture toughness of Test I of crack was obtained by the modified equipment. Experimental results indicate that the undisturbed frozen soil mechanics experiment is completely available, and the pre-crack creation and coloring technology to observe the crack size in the frozen soil experiment is also available.

备注：新增回溯数据