气候变化领域集成服务门户(CCPortal): Uncertainties of thermal boundaries and soil properties on permafrost table of frozen ground in Qinghai-Tibet Plateau

CCPortal

DOI	10.1016/j.jrmge.2020.10.008
	Uncertainties of thermal boundaries and soil properties on permafrost table of frozen ground in Qinghai-Tibet Plateau
	Wang, Tao; Peng, Erxing; Xia, Lijiang; Zhou, Guoqing; Wang, Jianzhou
通讯作者	Wang, T (通讯作者)，China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China.
发表日期	2021
ISSN	1674-7755
EISSN	2589-0417
起始页码	671
结束页码	681
卷号	13 期号:3
英文摘要	In the permafrost regions of the Qinghai-Tibet Plateau (QTP), the permafrost table has a significant effect on the stability of geotechnical engineering. The thermal boundaries and soil properties are the key factors affecting the permafrost table. Complex geological environments and human activities can lead to the uncertainties of thermal boundaries and soil properties. In this paper, an array of field experiments and Monte Carlo (MC) simulations of thermal boundaries and soil properties are carried out. The coefficient of variation (COV), scale of fluctuation (SOF), and autocorrelation distance (ACD) of uncertainties of thermal boundaries and soil properties are investigated. A stochastic analysis method of the probabilistic permafrost table is then proposed, and the statistical properties of permafrost table on the QTP are computed by self-compiled program. The proposed stochastic analysis method is verified with the calculated and measured temperature observations. According to the relationship between ACD and SOF for the five theoretical autocorrelation functions (ACFs), the effects of ACF, COV, and ACD of soil properties and the COV of thermal boundaries on the permafrost tables are analyzed. The results show that the effects of different ACFs of soil properties on the standard deviation (SD) of permafrost table depth are not obvious. The SD of permafrost table depth increases with time, and the larger the COVs of thermal boundaries and soil properties, the deeper the SD of permafrost table; the longer the ACD of soil properties, the shallower the SD of permafrost table. This study can provide a reference for the stability analysis of geotechnical engineering on the QTP considering the uncertainties of thermal boundaries and soil properties. (C) 2021 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V.
关键词	CLIMATE-CHANGE RELIABILITY-ANALYSIS SPATIAL VARIABILITY SLOPE RELIABILITY TEMPERATURE EMBANKMENT REGIONS PARAMETERS SUBGRADE MODEL
英文关键词	Frozen soil; Spatial variability; Thermal boundary; Soil properties; Probabilistic permafrost table
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Geological
WOS记录号	WOS:000656383700015
来源期刊	JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254721
作者单位	[Wang, Tao; Zhou, Guoqing; Wang, Jianzhou] China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China; [Wang, Tao; Peng, Erxing] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Xia, Lijiang] Ludong Univ, Sch Food Engn, Yantai 264025, Peoples R China
推荐引用方式 GB/T 7714	Wang, Tao,Peng, Erxing,Xia, Lijiang,et al. Uncertainties of thermal boundaries and soil properties on permafrost table of frozen ground in Qinghai-Tibet Plateau[J]. 中国科学院西北生态环境资源研究院,2021,13(3).
APA	Wang, Tao,Peng, Erxing,Xia, Lijiang,Zhou, Guoqing,&Wang, Jianzhou.(2021).Uncertainties of thermal boundaries and soil properties on permafrost table of frozen ground in Qinghai-Tibet Plateau.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,13(3).
MLA	Wang, Tao,et al."Uncertainties of thermal boundaries and soil properties on permafrost table of frozen ground in Qinghai-Tibet Plateau".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 13.3(2021).