Creep Characteristics of Argillaceous Rock under Freezethaw Dry-wet Cycle

Abstract

Argillous rock refers to the rock in alternating wet and dry cycles for a long time. Its long-term deformation is not only related to time, but also related to the number of freeze-thaw cycles. The freezing-thawing dry-wet cycle will produce cracks and cementation between pores inside the rock, resulting in changes in the physical and mechanical properties of the rock. Therefore, the creep characteristics of argillaceous rocks change under the action of freeze-thaw cycle. Taking siltstone as the research object, creep tests of argillite rock under diff erent confi ning pressures after freeze-thaw dry-wet cycle were carried out in this paper, and the infl uence of freeze-thaw cycle on creep characteristics of siltstone was analyzed.