DOI: 10.1007/s11069-021-04699-5
论文题名: Time-dependent damage mechanism of rock deterioration under freeze–thaw cycles linked to alpine hazards
作者: Chen G. ; Wan Y. ; Li Y. ; Pei X.J. ; Huang D.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
卷: 108, 期: 1 起始页码: 635
结束页码: 660
语种: 英语
中文关键词: Alpine hazard
; Freeze–thaw
; Mechanical performance
; Rock deterioration
英文摘要: The unique natural environment of the alpine terrains along the Tianshan highway has led to the frequent occurrence of hazards. The typical hazards in this area, such as sliding collapse, have obvious time-dependent deformation characteristics, and the extreme climatic change causes rock mass deterioration under freeze–thaw cycles, which serves as an important factor that indirectly triggers hazards, while the relationship between the time-dependent characteristics of hazards and the damage characteristics of rock mass deterioration triggering hazards remains uncertain. A series of microscopic examination and macroscopic mechanical experiments were conducted on quartz sandstone from the Tianshan highway to study the mechanism. The experimental results show that the cyclic freeze–thaw action changed the microstructure of quartz sandstone and weakened its mechanical performance. The weakening effect on the long-term mechanical characteristics is much more remarkable than that on the short-term characteristics, and the failure modes become more complicated after long-term loading. Based on the experimental phenomenon, the mechanism was analyzed, and a new constitutive model was established to reflect the long-term mechanical characteristics of rock with freeze–thaw cycles and predict the deformation of an unstable rock mass during collapse. These results can provide a reference for alpine hazard prevention. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168946
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China; School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin, 300401, China
Recommended Citation:
Chen G.,Wan Y.,Li Y.,et al. Time-dependent damage mechanism of rock deterioration under freeze–thaw cycles linked to alpine hazards[J]. Natural Hazards,2021-01-01,108(1)