HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
工学研究科  >
雑誌発表論文等  >

A new approach to evaluate effective stress coefficient for strength in Kimachi sandstone

フルテキスト
JPSE.131(2015).70-79.pdf815.46 kBPDF見る/開く
この文献へのリンクには次のURLを使用してください:http://hdl.handle.net/2115/66339

タイトル: A new approach to evaluate effective stress coefficient for strength in Kimachi sandstone
著者: Dassanayake, A.B.N. 著作を一覧する
Fujii, Yoshiaki 著作を一覧する
Fukuda, Daisuke 著作を一覧する
Kodama, Jun-ichi 著作を一覧する
キーワード: Effective stress coefficient
Modified Failure Envelope Method
Peak strength
Residual strength
Bulk modulus
発行日: 2015年 7月
出版者: Elsevier
誌名: Journal of Petroleum Science and Engineering
巻: 131
開始ページ: 70
終了ページ: 79
出版社 DOI: 10.1016/j.petrol.2015.04.015
抄録: This paper is devoted to the experimental investigation of effective stress coefficient for peak and residual strengths of saturated Kimachi sandstone. Authors have described the Modified Failure Envelope Method (MFEM), which can be used to obtain the effective stress coefficients for peak and residual strengths (α-Peak and α-Residual). The effective stress coefficients for intact and fractured Kimachi sandstone (α-Biot׳s and α-Fractured) were also evaluated using conventional methods, and the data were compared with the coefficient values obtained by MFEM for the peak and residual strengths. The effective stress coefficient for intact rock, α-Biot׳s decreased with increasing confining pressure, and was in the range 1>α-Biot׳s>0.8. The effective stress coefficient for fractured rock, α-Fractured, was larger than that for intact rock and was close to unity. The effective stress coefficient calculated for peak strengths, α-Peak, using both the single and multistage MFEMs decreased with increasing effective confining pressure and was in the range 0.8>α-Peak>0.4. For residual strength states, effective stress coefficient, α-Residual, was between the peak strength value and that for intact rock. Based on the results, multistage MFEM is suitable for obtaining an effective stress coefficient for the peak strength, α-Peak. An equation to obtain the effective stress coefficient from total confining pressure and pore pressure, and a method to choose the coefficients for elastic stress analyses and failure evaluations for intact rock structures or structures in rock mass were proposed.
関連URI: http://www.sciencedirect.com/science/journal/09204105/131/supp/C
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/66339
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 藤井 義明

 

本サイトに関するご意見・お問い合わせは repo at lib.hokudai.ac.jp へお願いします。 - 北海道大学