Details

Autor(en) / Beteiligte

• Wang, Lehua
• Jiang, Zhaorong
• Li, Jianlin
• Tang, Kaiyu
• Jin, Jing

Titel

The bedding sandstone unloading mechanical properties experimental study in the freeze-thaw cycle conditions

Ist Teil von

• Bing chuan dong tu, 2016-01, Vol.38 (4), p.1052-1058

Erscheinungsjahr

2016

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• It studies the triaxial unloading mechanical properties of bedding sandstone under two kinds of moisture contents including free water-saturation and vacuum saturation and different freeze-thaw cycle times from 0 to 120 times). It shows that the strength of the sandstone decreases with the increase of freeze-thaw cycle times, and the degree of degradation of vacuum saturation group is more radical than that of free water-saturation group. Appearance damage occurs mainly in the edge of the rock's end and the vicinity of the bedding plane. The axial strain is produced in the stage of loading and residual deformation; and it has good correlation between the reduce of confining pressure and the growth of deformation in the unloading stage. The strain produced in the unloading stage is reduced with the increase of the freeze-thaw times, and unloading effect under the action of freeze-thaw becomes more sensitive. There are certain rules, but no significant, of the effect of the freeze-thaw times to failure mode, an