Experimental Evaluation of the Scale of Fluctuations in Rock Using Ultrasonic Tests

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	Experimental Evaluation of the Scale of Fluctuations in Rock Using Ultrasonic Tests
	Liu, Jian ; Jiang, Quan ; Xu, Dingping ; Zheng, Hong ; Chen, Tao ; Liu, Qiang ; Chen, Pengfei
	2023-05-01
发表期刊	INTERNATIONAL JOURNAL OF GEOMECHANICS
ISSN	1532-3641
卷号	23 期号:5
摘要	The properties of rock vary with spatial location, and spatial variability is a critical source of uncertainty that affects the safety of rock engineering. However, the key parameter characterizing spatial variability-the scale of fluctuation-is rarely studied in rock engineering. One of the reasons for this phenomenon is the lack of a simple and practical test method to determine the scale of fluctuation of rock. This deficiency hinders the development of reliability-based design in rock engineering. An evaluation method of the scale of fluctuation in rocks based on the compressive wave velocity of drilling cores is proposed to address this problem. First, drilling cores at the Yingliangbao hydropower station were collected, and the wave velocities were measured based on ultrasonic tests. Then, three different statistical methods, namely, the method of moments, maximum likelihood estimation, and Bayesian analysis, were used to evaluate the scale of fluctuation in rocks based on measured wave velocities. Results show that the optimal autocorrelation models that describe the autocorrelation structures of Yingliangbao granite are a single exponential function or cosine exponential function, and that the corresponding scales of fluctuation of Yingliangbao granite range from 6.33 to 12.44 m. In addition, the stationarity of the wave velocity is verified by the modified Bartlett test, and the scale of fluctuation based on in situ ultrasonic tests and the treatment of wave velocities at joint locations is discussed. This study presents a practical and reliable method to evaluate the scale of fluctuation in rocks and provide a reference for reliability evaluations in rock engineering projects.
关键词	Scale of fluctuation Ultrasonic test Spatial variability Rock mass Granite
学科领域	Engineering
语种	英语
WOS类目	Engineering, Geological
WOS记录号	WOS:000950724200028
出版者	ASCE-AMER SOC CIVIL ENGINEERS
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.198/handle/2S6PX9GI/34967
专题	中科院武汉岩土力学所
作者单位	1.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS; 2.Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Liu, Jian,Jiang, Quan,Xu, Dingping,et al. Experimental Evaluation of the Scale of Fluctuations in Rock Using Ultrasonic Tests[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2023,23(5).
APA	Liu, Jian.,Jiang, Quan.,Xu, Dingping.,Zheng, Hong.,Chen, Tao.,...&Chen, Pengfei.(2023).Experimental Evaluation of the Scale of Fluctuations in Rock Using Ultrasonic Tests.INTERNATIONAL JOURNAL OF GEOMECHANICS,23(5).
MLA	Liu, Jian,et al."Experimental Evaluation of the Scale of Fluctuations in Rock Using Ultrasonic Tests".INTERNATIONAL JOURNAL OF GEOMECHANICS 23.5(2023).