气候变化领域集成服务门户(CCPortal): Anisotropic strength, deformation and failure of gneiss granite under high stress and temperature coupled true triaxial compression

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DOI	10.1016/j.jrmge.2023.06.012
	Anisotropic strength, deformation and failure of gneiss granite under high stress and temperature coupled true triaxial compression
	Zhou, Hongyuan; Liu, Zaobao; Liu, Fengjiao; Shao, Jianfu; Li, Guoliang
发表日期	2024
ISSN	1674-7755
EISSN	2589-0417
起始页码	16
结束页码	3
卷号	16 期号:3
英文摘要	The anisotropic mechanical behavior of rocks under high-stress and high-temperature coupled conditions is crucial for analyzing the stability of surrounding rocks in deep underground engineering. This paper is devoted to studying the anisotropic strength, deformation and failure behavior of gneiss granite from the deep boreholes of a railway tunnel that suffers from high tectonic stress and ground temperature in the eastern tectonic knot in the Tibet Plateau. High-temperature true triaxial compression tests are performed on the samples using a self-developed testing device with five different loading directions and three temperature values that are representative of the geological conditions of the deep underground tunnels in the region. Effect of temperature and loading direction on the strength, elastic modulus, Poisson 's ratio, and failure mode are analyzed. The method for quantitative identi fication of anisotropic failure is also proposed. The anisotropic mechanical behaviors of the gneiss granite are very sensitive to the changes in loading direction and temperature under true triaxial compression, and the high temperature seems to weaken the inherent anisotropy and stress-induced deformation anisotropy. The strength and deformation show obvious thermal degradation at 200 degrees C due to the weakening of friction between failure surfaces and the transition of the failure pattern in rock grains. In the range of 25 degrees C-20 0 degrees C, the failure is mainly governed by the loading direction due to the inherent anisotropy. This study is helpful to the in-depth understanding of the thermal-mechanical behavior of anisotropic rocks in deep underground projects. (c) 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).
英文关键词	Anisotropic strength and deformation; True triaxial compression; Thermal mechanical coupling; Deep rock mechanics; High temperature rock mechanics
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Geological
WOS记录号	WOS:001231865500001
来源期刊	JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303535
作者单位	Northeastern University - China; Northeastern University - China; Centre National de la Recherche Scientifique (CNRS); Universite de Lille; Centrale Lille
推荐引用方式 GB/T 7714	Zhou, Hongyuan,Liu, Zaobao,Liu, Fengjiao,et al. Anisotropic strength, deformation and failure of gneiss granite under high stress and temperature coupled true triaxial compression[J],2024,16(3).
APA	Zhou, Hongyuan,Liu, Zaobao,Liu, Fengjiao,Shao, Jianfu,&Li, Guoliang.(2024).Anisotropic strength, deformation and failure of gneiss granite under high stress and temperature coupled true triaxial compression.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(3).
MLA	Zhou, Hongyuan,et al."Anisotropic strength, deformation and failure of gneiss granite under high stress and temperature coupled true triaxial compression".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.3(2024).