Particle breakage characteristics of frozen ideal uniform sands under triaxial compression

被引：0
|
作者：
Chen R. [1 ,2 ]
Sun H. [1 ,3 ]
Hao D.-X. [1 ,2 ]
Wu Z.-Y. [1 ,2 ]
Gao Y.-C. [1 ,2 ]
机构：
[1] School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin
[2] Key Lab of Electric Power Infrastructure Safety Assessment and Disaster Prevention of Jilin Province, Northeast Electric Power University, Jilin
[3] Guiyang Power Supply Bureau of Guizhou Power Grid, Guiyang
来源：
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2022年 / 44卷
关键词：
confining pressure; frozen sand; particle breakage; particle-size influence;
D O I：
10.11779/CJGE2022S1017
中图分类号：
学科分类号：
摘要：
The triaxial shear tests on three groups of frozen ideal sands are carried out to investigate the evolution rules of particle breakage during shearing process and the effects of particle size on the particle breakage. It is shown that obvious pressure melting of sand samples takes place under -1℃ ~ -2℃ when σ3 ≥5 MPa, and the strength of frozen sands is even less than the unfrozen strength due to rapid melting near shearing rupture plane at -1℃. The particle breakage of frozen sands occurs during shearing. The particle breakage rate continues to increase with the increase of the axial strain, and even develops with the acceleration after the peak strength under high confining pressure (σ3 ≥5 MPa). The influences of the particle size of frozen sands on the breakage rate is different from those of unfrozen sands. The particle breakage rate of the frozen sands of small particle group is the largest, which may be related to the action of ice crystals in different parts of frozen soils. © 2022 Chinese Society of Civil Engineering. All rights reserved.
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页码：92 / 97
页数：5
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