Tangent modulus method : An original method to measure in-situ rock stress

Fujii, Yoshiaki; Makasi, M.; Kodama, Jun-ichi; Fukuda, Daisuke; Goto, K.; Kumakura, S.; Kanaoka, M.; Dassanayake, A.B.N.

Tangent modulus method : An original method to measure in-situ rock stress

Fujii, Yoshiaki; Makasi, M.; Kodama, Jun-ichi et al.

Tunnelling and Underground Space Technology, 2018, 82, 148-155

Permalink : https://hdl.handle.net/2115/79823

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アクセス権	open access
URI	https://hdl.handle.net/2115/79823
タイトル	Tangent modulus method : An original method to measure in-situ rock stress
著者	Fujii, Yoshiaki ; Makasi, M. ; Kodama, Jun-ichi ; Fukuda, Daisuke ; Goto, K. ; Kumakura, S. ; Kanaoka, M. ; Dassanayake, A.B.N.
e-Rad_Researcher 70192309 著者名 Fujii, Yoshiaki
著者名 Makasi, M.
e-Rad_Researcher 70241411 著者名 Kodama, Jun-ichi
e-Rad_Researcher 80647181 著者名 Fukuda, Daisuke
著者名 Goto, K.
著者名 Kumakura, S.
著者名 Kanaoka, M.
著者名 Dassanayake, A.B.N.
言語	英語
キーワード	Tangent modulus method
	In-situ rock stress
	Strain rate
	Temperature
	Confining pressure
発行日	2018-12
出版者	Elsevier
収録物名	Tunnelling and Underground Space Technology
巻(号)	82
ページ	148-155
抄録	This paper proposed Tangent Modulus Method (TMM) which is an improved oriented core method to determine in-situ rock stresses. In this approach, the cylindrical specimens prepared along different directions from thick core samples were uniaxially compressed twice to a given stress level. The stress value of the bending point in the first loading cycle of the stress-tangent modulus curve is considered as the normal component of the in-situ rock stress along the drilled direction of the specimen. Four types of rocks from soft porous tuff and sandstone to hard crystalline granite was investigated to evaluate the potential of this method. The effects of changes in strain rate, temperature, water content, confining and pore pressure, and stresses larger than the preload on the stress value of the bending point were experimentally investigated on preload specimens to investigate their influence on TMM. Comparison of the stress measurement results by TMM and an overcoring method at AK tunnel in Hokkaido, Japan was also performed to validate the TMM.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	© 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	0886-7798
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.tust.2018.08.005