Development of advanced and economical countermeasure against liquefaction for foundations of houses

• Project/Area Number: 19560559
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Building structures/materials
• Research Institution: Tohoku University
• Principal Investigator: MITSUJI Kazuya Tohoku University, 大学院・工学研究科, 助教 (90292250)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2008: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2007: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 建築構造・材料 / 地盤工学 / 防災 / 減災 / 耐震 / 建築・構造材料

Research Abstract

The advantage of utilizing partially saturated sand by "air-injection technique" for liquefaction countermeasure using the numerical analyses has been examined. One-dimensional effective stress analysis was carried out for liquefiable ground and improved ground by "air-injection technique". Numerical analysis for pile response, comparison to the case of the existing soil improvement and investigation of the effect of the spatial fluctuation of the degree of saturation were also conducted. The results show the effectiveness of the proposed technique. Experimental study is needed in the further development.

Research Products

• [Journal Article] 直接基礎底面の摩擦係数が建物入力に及ぼす影響 (2009)
  • Author(s): 松川和人, 前田匡樹, 三辻和弥
  • Journal Title: 日本建築学会大会学術講演梗概集 C-2, 構造II Pages: 327-328
• [Journal Article] 2008年岩手・宮城内陸地震により被災したRC造学校建築の入力地震動と被害要因に関する研究 その1 対象建物の被害と耐震性能 (2009)
  • Author(s): 中神宏昌, 三辻和弥, 松川和人, 前田匡樹
  • Journal Title: 日本建築学会大会学術講演梗概集 C-2, 構造III Pages: 347-348
• [Journal Article] 2008年岩手・宮城内陸地震により被災したRC造学校建築の入力地震動と被害要因に関する研究 その2 余震観測記録の分析と本震時地震応答の推定 (2009)
  • Author(s): 三辻和弥, 中神宏昌, 松川和人, 前田匡樹
  • Journal Title: 日本建築学会大会学術講演梗概集 C-2, 構造III Pages: 349-350
• [Journal Article] Numerical Simulations for Development of Liquefaction Countermeasures by Use of Partially Saturated Sand (2008)
  • Author(s): Mitsuji Kazuya
  • Journal Title: 14th World Conference on Earthquake Engineering No. 04-02-0021
  • Peer Reviewed
• [Journal Article] NUMERICAL SIMULATIONS FOR DEVELOPMENT OF LIQUEFACTION COUNTERMEASURES BY USE OF PARTIALLY SATURATED SAND (2008)
  • Author(s): MITSUJI Kazuya
  • Journal Title: 14^<th> World Conference on Earthquake Engineering
  • Peer Reviewed
• [Journal Article] 不均質・混合体の数理解析手法と工学への応用 (2007)
  • Author(s): 三辻和弥
  • Journal Title: 不飽和地盤の地震応答、シンポジウム(日本建築学会) Pages: 50-60
• [Journal Article] 不飽和地盤の地震応答 (2007)
  • Author(s): 三辻和弥
  • Journal Title: シンポジウム「不均質・混合体の数理解析手法と工学への応用」 1 Pages: 50-60
• [Journal Article] Seismic Response and Lateral Resistance of a pile in Liquefiable Ground Including Unsaturated Sand Layers (2007)
  • Author(s): MITSUJI Kazuya and SUGIMURA Yoshihiro
  • Journal Title: 4Th US-Japan Workshop on Soil-Structure Interaction 1
• [Presentation] 2008年岩手・宮城内陸地震で被災したRC造建物の地震応答の推定 (2009)
  • Author(s): 三辻和弥, 前田匡樹, 中神宏昌, 松川和人
  • Organizer: 第44回地盤工学研究発表会, pp.1507-1508
  • Place of Presentation: 神奈川県 関東学院大学
  • Year and Date: 2009-08-18
• [Presentation] 気泡注入による不飽和化を想定した改良地盤の地震応答解析 (2008)
  • Author(s): 三辻和弥
  • Organizer: 第43回地盤工学研究発表会
  • Place of Presentation: 広島国際会議場
  • Year and Date: 2008-07-10
• [Presentation] 地盤の不飽和化による杭の地震時水平力の低減 (2007)
  • Author(s): 三辻和弥
  • Organizer: 第42回地盤工学研究発表会
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2007-07-05
• [Presentation] 地盤の不飽和化による杭の地震時水平応力の低減 (2007)
  • Author(s): 三辻和弥
  • Organizer: 第42回地盤工学研究発表会
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2007-07-05
• [Remarks] ホームページ等