Coupling effect of heat-moisture-stress on the freeze-thaw characteristics of slope supported with framed anchor

doi:10.1007/s12517-021-09305-3

CORC > 兰州理工大学 > 兰州理工大学

	Coupling effect of heat-moisture-stress on the freeze-thaw characteristics of slope supported with framed anchor
	Xiang Tian 3; Li Yuan-xun 2,3; Ye Shuai-hua 1; Li Hui 2,3
刊名	ARABIAN JOURNAL OF GEOSCIENCES
	2022
卷号	15 期号:1
关键词	Freeze-thaw load Frame anchor support Slope in seasonal freezing zone Multi-field coupling MATLAB
ISSN号	1866-7511
DOI	10.1007/s12517-021-09305-3
英文摘要	In order to investigate the freeze-thaw law of frame-anchored supported slopes in the seasonal freezing zone, based on the theory of the heat and matter passing, the mathematic model equations of temperature, moisture, and stress fields were established. The temperature and moisture fields were analyzed using the finite difference method, and the stress fields were analyzed using the finite unit method at each time step. For the synergistic effect of soil and support structure, a zero-width four-node unit is proposed as a link unit to reflect the linkage between the two. The calculation program was prepared using MATLAB software, and the accuracy practicability of the program is verified by the accordance of calculating and experimenting results. These results indicate the following: the top of the slope is more affected by temperature, and the maximum depth of surface temperature effect on the soil is 2.0m and 1.5m at freezing and thawing, respectively. The shear stress at freezing is about 2.5 times of that at thawing and is evenly distributed on the slope, when the slope is in a stable state; the shear stress at the foot of the slope appears stress concentration at the thawing, and sudden change of shear stress occurs at the intersection of the thawing and freezing zones, at which time the slope is in an unstable state; the inner force of anchor rod in freezing condition is the largest among the 3 working conditions, about 2.4 similar to 2.5 times of the initial condition; the anchor rod leaves residual stress in thawing, about 1.1 similar to 1.3 times of the initial condition. It shows that the frost deformation during the frozen-thaw process has a great influence on the internal force of the anchor rod. Once its tensile limit is exceeded, the anchor rod will be pulled out, resulting in protection failure and slope instability. Therefore, the effect of frost deformation on the internal force of anchor rod should not be ignored, and it is necessary to pay attention to the slope engineering in similar soil climate areas.
WOS研究方向	Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000733749700003
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/154908]
专题	兰州理工大学
作者单位	1.Lanzhou Univ Tech, Key Lab Disaster Prevent & Mitigat Civil Engn Gan, Lanzhou 730050, Peoples R China 2.Qinghai Key Lab Bldg Energy Saving Mat & Engn Saf, Xining 810016, Qinghai, Peoples R China; 3.Qinghai Univ, Sch Civil Engn, Xining 810016, Qinghai, Peoples R China;
推荐引用方式 GB/T 7714	Xiang Tian,Li Yuan-xun,Ye Shuai-hua,et al. Coupling effect of heat-moisture-stress on the freeze-thaw characteristics of slope supported with framed anchor[J]. ARABIAN JOURNAL OF GEOSCIENCES,2022,15(1).
APA	Xiang Tian,Li Yuan-xun,Ye Shuai-hua,&Li Hui.(2022).Coupling effect of heat-moisture-stress on the freeze-thaw characteristics of slope supported with framed anchor.ARABIAN JOURNAL OF GEOSCIENCES,15(1).
MLA	Xiang Tian,et al."Coupling effect of heat-moisture-stress on the freeze-thaw characteristics of slope supported with framed anchor".ARABIAN JOURNAL OF GEOSCIENCES 15.1(2022).