Visualization of swelling process of unsaturated bentonite by microfocus X-ray CT and elasto-viscoplastic modeling

• Project/Area Number: 20760312
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Geotechnical engineering
• Research Institution: Kyoto University
• Principal Investigator: HIGO Yosuke Kyoto University, 大学院・工学研究科, 助教 (10444449)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2008: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: マイクロX線CT / ベントナイト / 膨潤 / 浸透 / 可視化 / 弾粘塑性構成式 / 3相連成解析

Research Abstract

As a fundamental study for the design of bentonite barrier of radioactive waste disposal field, the mechanism of seepage-swelling behavior of bentonite has been studied through visualization by microfocus X-ray CT, and an elasto-viscoplastic model and a numerical simulation method for analyzing seepage-swelling behavior of bentonite has been developed.

Research Products

• [Journal Article] An elasto-viscoplastic numerical analysis of the swelling process of unsaturated bentonite (2008)
  • Author(s): F. Oka, H. Feng, S, Kimoto, Y. Higo
  • Journal Title: Journal of Applied Mechanics(JSCE) Vol.11 Pages: 369-376
  • NAID: 130004091249
  • Peer Reviewed
• [Journal Article] An elasto-viscoplastic numerical analysis of the swelling process of unsaturated bentonite (2008)
  • Author(s): F. Oka, H. Feng, S, Kimoto and Y. Higo
  • Journal Title: Journal of Applied Mechanics, JSCE Vol.11 Pages: 369-376
  • NAID: 130004091249
  • Peer Reviewed
• [Presentation] Elasto-viscoplastic constitutive modeling of the swelling process of unsaturated clay (2009)
  • Author(s): F.Oka, S, Kimoto, Y.Higo, H.Feng
  • Organizer: 4th Asia-Pacific Conference on Unsaturated Soils
  • Place of Presentation: Newcastle, Australia
  • Year and Date: 2009-11-24
• [Presentation] Elasto-viscoplastic constitutive modeling of the swelling process of unsaturated clay (2009)
  • Author(s): F. Oka, S, Kimoto, Y. Higo, H. Feng
  • Organizer: 4th Asia-Pacific Conference on Unsaturated Soils
  • Place of Presentation: Newcastle, Australia.
  • Year and Date: 2009-11-23
• [Presentation] Numerical modeling of swelling and the osmotic consolidation of bentonite (2009)
  • Author(s): F.Oka, H.Feng, S.Kimoto, A.J.Tinet, Y.Higo
  • Organizer: 1^<st> International Symposium on Computational Geomechanics
  • Place of Presentation: Nice, France
  • Year and Date: 2009-04-30
• [Remarks]
  • URL: http://nakisuna2.kuciv.kvoto-u.ac.jp/okalabo1/