Model test of the stability degradation of a prestressed anchored rock slope system in a corrosive environment

doi:10.1007/s11629-019-5835-7

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2020 > Vol17 No.10

	Model test of the stability degradation of a prestressed anchored rock slope system in a corrosive environment
	Li Cong; Zhang Rong-tang; Zhu Jie-bing; Liu Zhi-jun; Lu Bo; Wang Bing; Jiang Yu-zhou; Liu Jie-sheng; Zeng Ping
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2020
卷号	17 期号:10 页码:2548-2561
关键词	Model test Bedding slope Prestressed anchorage Corrosion Electrochemical measurement
ISSN号	1672-6316
DOI	10.1007/s11629-019-5835-7
文献子类	Article
英文摘要	The long-term stability of a prestressed anchored slope might be influenced by the durability of the anchorage structure. To understand long-term stability of anchored rock slopes, the research presented herein evaluated the performance evolution of a prestressed anchored bedding slope system in a corrosive environment by model test. The corrosion process in a prestressed anchor bar was monitored in terms of its open-circuit potential (OCP), corrosion current density (CCD), and electrochemical impedance spectroscopy (EIS). The stability of the prestressed anchored slope was evaluated by monitoring changes in anchorage force and displacements. The experimental results show that prestress and oxygen could reduce the corrosion resistance of the anchor bar, and anchor bars in a chloride-rich environment are very susceptible to corrosion. Prestressed tendons in a corrosive environment suffer a loss of anchorage force, the prestress decreases rapidly after locking, and the rate thereof decreases until stabilising; in the later stage, corrosion leads to the reduction of the cross-sectional area of the steel bar which may cause the reduction in anchorage force again. Anchorage force controls the deformation and stability of the anchored slope, the prestress loss caused by later corrosion may lead to an increased rate of displacement and stability degradation of the prestressed anchored rock slope.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000578876400016
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/50625]
专题	Journal of Mountain Science_Journal of Mountain Science-2020_Vol17 No.10
推荐引用方式 GB/T 7714	Li Cong,Zhang Rong-tang,Zhu Jie-bing,et al. Model test of the stability degradation of a prestressed anchored rock slope system in a corrosive environment[J]. JOURNAL OF MOUNTAIN SCIENCE,2020,17(10):2548-2561.
APA	Li Cong.,Zhang Rong-tang.,Zhu Jie-bing.,Liu Zhi-jun.,Lu Bo.,...&Zeng Ping.(2020).Model test of the stability degradation of a prestressed anchored rock slope system in a corrosive environment.JOURNAL OF MOUNTAIN SCIENCE,17(10),2548-2561.
MLA	Li Cong,et al."Model test of the stability degradation of a prestressed anchored rock slope system in a corrosive environment".JOURNAL OF MOUNTAIN SCIENCE 17.10(2020):2548-2561.