Study of Optimizing Control of Embankment Construction on Peaty Ground Combinedly using Vacuum Consolidation Method

• Project/Area Number: 23760438
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Geotechnical engineering
• Research Institution: Akita University
• Principal Investigator: OGINO Toshihiro 秋田大学, 工学(系)研究科(研究院), 准教授 (80312693)
• Research Collaborator: YAMAZOE Nobutaka (株)シーウェイエンジニアリング, 技術部, 次長
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2013: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000); Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2011: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 真空圧密 / 高有機質土 / 国際情報交流

Research Abstract

A series of laboratory triaxial tests which simulated embankment construction on peaty ground combinedly using vacuum consolidation method were performed to confirm that optimizing the rate and starting time of the embankment loading can suppress lateral deformation of the ground during construction. The test results revealed that the rate and start time of axial stress loading strongly affected resulting lateral strain of the samples. Possibility that optimization of the loading condition of vacuum pressure and embankment allows one to construct the embankment with almost no lateral deformation was indicated.
Combined loading of vacuum pressure and axial stress also strongly improved strength and deformation characteristics of peat samples. A prediction method proposed so far for clayey soil could successfully be applied to undrained shear strength of peat soils under the combined loading.

Research Products

• [Journal Article] 有機分を含む土の初期せん断剛性率および規準ひずみの定式化 (2013)
  • Author(s): 佐藤望真,荻野俊寛,高橋貴之,林宏親,及川洋
  • Journal Title: 地盤工学ジヤーナル Volume: Vol. 8,No. 1 Pages: 133-142
  • NAID: 130004944087
  • Peer Reviewed
• [Journal Article] プラスチックボードドレーン工法を適用した泥炭地盤の圧密沈下予測に用いる水平方向圧密係数 (2012)
  • Author(s): 山添誠隆,田中洋行,林宏親,荻野俊寛,三田地利之
  • Journal Title: 地盤工学ジヤーナル Volume: Vol. 8, No. 4 Pages: 517-532
  • NAID: 130004482941
  • Peer Reviewed
• [Journal Article] 東北地方の特色ある地盤 (2012)
  • Author(s): 荻野俊寛,清原雄康,仙頭紀明
  • Journal Title: 地盤工学会誌 Volume: Vol. 60, No. 10 Pages: 17-19
  • NAID: 10031135274
• [Presentation] 真空圧密盛土工法をシミュレートした三軸試験による高有機質土の変形挙動 (2014)
  • Author(s): 柳田陽平,荻野俊寛,高橋貴之,山添誠隆,及川洋
  • Organizer: 土木学会東北支部技術研究発表会
  • Place of Presentation: 八戸市
  • Year and Date: 2014-03-08
• [Presentation] 真空圧密併用盛土工法をシミュレートした三軸試験による高有機質土の変形挙動 (2014)
  • Author(s): 柳田陽平
  • Organizer: 土木学会東北支部
  • Place of Presentation: 青森県八戸市
• [Presentation] 盛土併用真空圧密工法を模擬した三軸試験による高有機質土の変形挙動 (2011)
  • Author(s): 三浦豪太,荻野俊寛,高橋貴之,三田地利之,及川洋
  • Organizer: 第46回地盤工学研究発表会発表講演集
  • Place of Presentation: 仙台市
  • Year and Date: 2011-03-05