Evaluating failure criterion for cement-treated soil under a low confining pressure

• Project/Area Number: 25420509
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Geotechnical engineering
• Research Institution: Shibaura Institute of Technology
• Principal Investigator: Namikawa Tsutomu 芝浦工業大学, 工学部, 教授 (50455151)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: セメント改良土 / 引張 / 破壊規準 / 三軸引張 / 弾塑性モデル / せん断 / 有限要素法 / 地盤工学 / 引張破壊 / 室内試験 / 引張挙動 / 破壊基準

Outline of Final Research Achievements

Tensile stress possibly occurs in cement mixing soil column and wall under a low confining stress condition when external forces apply to the column or wall. Thus the evaluation of tensile behavior of cement-treated soils is one of the major issues for designing the ground improvement. The purpose of this study is to clarify the tensile and shear failure criteria of cement-treated soil. Triaxail tension tests are conducted to reveal the tensile and shear failure behaviors of cement-treated soils. Moreover the elasto-plastic model developed by the researcher is verified by comparing between the experimental and numerical results. The developed elasto-plastic model can be implemented in the finite element software DIANA.

Research Products

• [Journal Article] Conditional Probabilistic Analysis of Cement-Treated Soil (2016)
  • Author(s): Tsutomu Namikawa
  • Journal Title: International Journal of Geomechanics Volume: 16 Issue: 1
  • DOI: 10.1061/(asce)gm.1943-5622.0000481
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Triaxial tension test of cement-treated soil (2014)
  • Author(s): Namikawa T. Hiyama S.
  • Journal Title: Proceedings of the 15th Danube-European Conference on Geotechnical Engineering Volume: 1 Pages: 329-334
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Verification of random finite element analysis for evaluating behavior of a cement-treated soil column (2014)
  • Author(s): Namikawa T.
  • Journal Title: Geotechnique, Construction Materials and Environment Volume: 4 Pages: 24-29
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] SIMULATION OF TRIAXIAL TENSION BEHAVIOR OF CEMENT-TREATED SOIL USING ELASTO-PLASTIC MODEL (2016)
  • Author(s): Tsutomu Namikawa
  • Organizer: Sixth International Conference on Geotechnique, Construction Materials and Environment
  • Place of Presentation: Bangkok
  • Year and Date: 2016-11-14
  • Int'l Joint Research
• [Presentation] ばらつきを有するセメント改良供試体の一軸圧縮試験のFEM解析 (2016)
  • Author(s): 並河努
  • Organizer: 第12回地盤工学シンポジウム
  • Place of Presentation: 京都
  • Year and Date: 2016-10-27
  • Int'l Joint Research
• [Presentation] セメント改良土の一軸引張試験におけるサクションの影響 (2014)
  • Author(s): 長谷川聡子 並河努
  • Organizer: 第11回 地盤工学会関東支部発表会
  • Place of Presentation: 日本科学未来館
  • Year and Date: 2014-10-03
• [Presentation] セメント改良土の曲げ破壊エネルギーの評価 (2014)
  • Author(s): 深谷健 並河努
  • Organizer: 第11回 地盤工学会関東支部発表会
  • Place of Presentation: 日本科学未来館
  • Year and Date: 2014-10-03
• [Presentation] セメント改良砂の引張強度及び変形特性 (2014)
  • Author(s): 檜山将太 並河努
  • Organizer: 第49回 地盤工学研究発表会
  • Place of Presentation: 北九州国際会議場
  • Year and Date: 2014-07-15 – 2014-07-17
• [Presentation] セメント改良砂の引張強度及び変形特性 (2014)
  • Author(s): 檜山将太, 並河 努
  • Organizer: 第49回地盤工学研究発表会
  • Place of Presentation: 北九州国際会議場
• [Presentation] Triaxial tension test of cement-treated soil (2014)
  • Author(s): Namikawa T., Hiyama S.
  • Organizer: XV Danube-European Conference on Geotechnical Engineering
  • Place of Presentation: Vienna Austria
• [Presentation] Verification of random finite element analysis for evaluating behavior of a cement-treated soil column (2014)
  • Author(s): Namikawa T.
  • Organizer: Geomate 2014
  • Place of Presentation: Brisbane Australia