气候变化领域集成服务门户(CCPortal): The Promotion Mechanism of Frozen Stagnant Water on the Sliding in the Loess Landslide Zone of Heifangtai

CCPortal

DOI	10.1155/2021/9749011
	The Promotion Mechanism of Frozen Stagnant Water on the Sliding in the Loess Landslide Zone of Heifangtai
	Zhang, Mingli; Li, Guang; Wang, Dekai; Ye, Weilin; Zhou, Zhixiong; Ma, Zhao; Xia, Kai
通讯作者	Zhang, ML (通讯作者)，Lanzhou Univ Technol, Coll Civil Engn, Lanzhou 730050, Peoples R China. ; Zhang, ML (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China. ; Zhang, ML (通讯作者)，Gansu Acad Sci, Geol Hazards Prevent Inst, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	1468-8115
EISSN	1468-8123
卷号	2021
英文摘要	Freeze-thaw cycles can significantly change the hydrologic and thermal state of slopes in cold regions and affect their stability. Landslides occur continuously in the slip area of seasonally frozen soil area during the freezing period. The freeze-thaw action and the difference in the characteristics of the underlying surface of the slope are important factors inducing landslides. Taking Heifangtai slope in Gansu Province as an example, the freezing-thawing characteristics of the slope surfaces under different underlying surface conditions were analyzed by field monitoring. A thermohydromechanical coupling model was established to reconstruct the frozen stagnant water process of the Heifangtai landslide zone, and the impact of freeze-thaw action on the loess landslide zone was studied. The results show that differences in the underlying surface led to different freezing-thawing characteristics between the unsaturated area and the groundwater overflow zone. During the freezing period, the soil freezing depth was greater, and the freezing duration was longer in the unsaturated area. The frozen stagnant water effect of the Heifangtai loess landslide zone is obvious. The maximum difference in the groundwater level between February and August could reach nearly 1 m. Meanwhile, the frozen stagnant water process of the Heifangtai landslide zone has a slip-promoting action on the slope. The factor of safety declined during the freezing period and increased during the thawing period. It reached a minimum of 1.42 in February.
关键词	SLOPE STABILITY GANSU IRRIGATION FLOWSLIDES TERRACE
语种	英语
WOS研究方向	Geochemistry & Geophysics ; Geology
WOS类目	Geochemistry & Geophysics ; Geology
WOS记录号	WOS:000721592800007
来源期刊	GEOFLUIDS
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/253906
作者单位	[Zhang, Mingli; Li, Guang; Zhou, Zhixiong; Ma, Zhao; Xia, Kai] Lanzhou Univ Technol, Coll Civil Engn, Lanzhou 730050, Peoples R China; [Zhang, Mingli] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Zhang, Mingli; Wang, Dekai; Ye, Weilin] Gansu Acad Sci, Geol Hazards Prevent Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Mingli,Li, Guang,Wang, Dekai,et al. The Promotion Mechanism of Frozen Stagnant Water on the Sliding in the Loess Landslide Zone of Heifangtai[J]. 中国科学院西北生态环境资源研究院,2021,2021.
APA	Zhang, Mingli.,Li, Guang.,Wang, Dekai.,Ye, Weilin.,Zhou, Zhixiong.,...&Xia, Kai.(2021).The Promotion Mechanism of Frozen Stagnant Water on the Sliding in the Loess Landslide Zone of Heifangtai.GEOFLUIDS,2021.
MLA	Zhang, Mingli,et al."The Promotion Mechanism of Frozen Stagnant Water on the Sliding in the Loess Landslide Zone of Heifangtai".GEOFLUIDS 2021(2021).