Strength and deformation properties of porous granular material and proposing of ground investigation method with focusing on elast-plastic deformation and crushing of its particle

• Project/Area Number: 23760448
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Geotechnical engineering
• Research Institution: National Institute of Occupational Safety and Health, Japan
• Principal Investigator: KIKKAWA Naotaka 独立行政法人労働安全衛生総合研究所, 建設安全研究グループ, 研究員 (60575140)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 軽石 / コーン貫入試験 / 個別要素法 / 画像解析

Research Abstract

In order to evaluate the macro-properties from the micro-properties of pumice sand, a series of experimental tests and simulations were performed. As a result, the crushing strength of pumice sand particle was much smaller than that of the other sand particle (e.g. silica sand such as Toyoura sand). The tip resistance of pumice sand during cone penetrating was also much smaller than that of Toyoura sand, it was because of much small particle crushing strength. The normalized tip resistance and ratio of sleeve friction of pumice sand and Toyoura sand were plotted on the Robertson's soil classification figure and both are distinguished easily and it is supposed to judge if the pumice sand layer were existing on a site with the Robertson's soil classification figure.

Research Products

• [Journal Article] Observations on microstructure of pumice particles using computed tomography (2013)
  • Author(s): Kikkawa, N., Orense, R.P. and Pender, M.J
  • Journal Title: Canadian Geotechnical Journal Volume: Vo. 50 Pages: 1109-1117
• [Journal Article] Observations on microstructure of pumice particles using computed tomography (2013)
  • Author(s): Naotaka KIKKAWA, Rolando P. ORENSE and Michael J. PENDER
  • Journal Title: Canadian Geotechnical Journal Volume: 50 Issue: 11 Pages: 1109-1117
  • DOI: 10.1139/cgj-2012-0365
  • Peer Reviewed
• [Journal Article] 粒子の弾塑性変形と破砕に着目した多孔質粒状体の強度変形特性と地盤調査法の提案 (2012)
  • Author(s): 吉川直孝, Pender, M.J. and Orense, R.P
  • Journal Title: 平成24年版建設業安全衛生年鑑 Pages: 88-88
• [Journal Article] 粒子の弾塑性変形と破砕に着目した多孔質粒状体の強度変形特性と地盤調査法の提案 (2012)
  • Author(s): 吉川直孝, Michael PENDER, Rolando ORENSE
  • Journal Title: 平成24年版建設業安全衛生年鑑 Volume: 1 Pages: 88-88
• [Presentation] Comparison of the geotechnical properties of pumice sand from Japan and New Zealand (2013)
  • Author(s): Kikkawa, N., Pender, M.J. and Orense, R.P
  • Organizer: Proc. Of the 18^<th> International Conference on Soil Mechanics and Geotechnical Engineering
  • Place of Presentation: Paris
• [Presentation] Micro-properties of pumice particles using computed tomography (2013)
  • Author(s): Kikkawa, N., Pender, M.J. and Orense, R.P
  • Organizer: Experimental Micromechanics for Geomaterials – Joint Workshop of the ISSMGE TC101-TC105
  • Place of Presentation: HongKong
• [Presentation] Comparison of the geotechnical properties of pumice sand from Japan and New Zealand (2013)
  • Author(s): Naotaka KIKKAWA, Michael J. PENDER and Rolando P. ORENSE
  • Organizer: Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering
  • Place of Presentation: Paris
• [Presentation] Micro-properties of pumice particles using computed tomography (2013)
  • Author(s): Naotaka KIKKAWA, Michael J. PENDER and Rolando P. ORENSE
  • Organizer: Experimental Micromechanics for Geomaterials - Joint Workshop of the ISSMGE TC101-TC105
  • Place of Presentation: HongKong
• [Presentation] Micro-properties of pumice particles using computed tomography (2013)
  • Author(s): Naotaka KIKKAWA, Michael PENDER, Rolando ORENSE
  • Organizer: Experimental Micromechanics for Geomaterials Joint Workshop of the ISSMGE TC101-TC105
  • Place of Presentation: Hong Kong
• [Presentation] 軽石の力学特性 (2012)
  • Author(s): 吉川直孝, 伊藤和也, 堀智仁, 三田地利之,Pender, M.J. and Orense, R.P
  • Organizer: 第9回地盤工学会関東支部発表会
  • Place of Presentation: 東京都
  • Year and Date: 2012-10-05