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Biot’s Effective Stress Coefficient of Rocks for Peak and Residual Strengths by Modified Failure Envelope Method

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Title: Biot’s Effective Stress Coefficient of Rocks for Peak and Residual Strengths by Modified Failure Envelope Method
Authors: Dassanayake, Anjula Buddhika Nayomi Browse this author
Fujii, Yoshiaki Browse this author →KAKEN DB
Issue Date: May-2014
Publisher: CRC Press
Citation: Rock Engineering and Rock Mechanics: Structures in and on Rock Masses, ISBN: 978-1-13800-149-7
Start Page: 155
End Page: 160
Abstract: Kimachi sandstone and Shikotsu welded tuff were tested in single and multistage triaxial tests to determine the Biot’s effective stress coefficient (α). Pure water saturated 30mm in diameter and length of 60mm cylindrical test specimens were introduced for triaxial compression, with strain rate at 10−5 s−1. For Kimachi sandstone, α value for peak strength decreased with effective confining pressure. α values for residual strength were almost constant and larger than the case of peak strength. For Shikotsu welded tuff, only two data points were obtained for peak strength due to pore collapse and α value for residual strength decreased with effective confining pressure. The multistage test has given a fair evaluation of the coefficient for peak strength of Kimachi snadstone. Number of specimens and variation from specimen to specimen can be reduced by using multistage tests although further considerations are required to obtain the coefficient for residual strength.
Description: 2014 ISRM European Rock Mechanics Symposium (EUROCK 2014), May 27-29, 2014, Vigo, Spain.
Conference Name: ISRM European Rock Mechanics Symposium (EUROCK)
Conference Sequence: 2014
Conference Place: Vigo
Type: proceedings (author version)
URI: http://hdl.handle.net/2115/58548
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藤井 義明

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