Evaluation of extent of damage in geogrid reinforced soil walls subjected to earthquakes

• Project/Area Number: 20360208
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geotechnical engineering
• Research Institution: Saitama University
• Principal Investigator: KUWANO Jiro Saitama University, 地圏科学研究センター, 教授 (30178149)
• Co-Investigator(Renkei-kenkyūsha): SAITO Masahito 埼玉大学, 理工学研究科, 准教授 (40334156) ; IZAWA Jun 東京工業大学, 理工学研究科, 助教 (70345388) ; TACHIBANA Shinya 埼玉大学, 地圏科学研究センター, 助教 (90432567)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000); Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2009: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2008: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
• Keywords: 地盤工学 / 地盤防災 / 補強土 / 被災 / ジオグリッド / 除荷再載荷 / 残存性能 / 引抜き抵抗 / 地震 / 引抜き特性 / 除荷・再載荷 / 復旧

Research Abstract

In this study, evaluation of degree of damage in GRSW is discussed. Shear strain of backfill material in the reinforced area is evaluated from the horizontal displacement of the wall. Then, occurrence of the slip line is decided based on the simple plastic theory. Since the past studies show that seismic stability of the GRSW depends upon the pullout resistance between geogrid and backfill material after the generation of slip line in the backfill, seismic stability of the GRSW having slip line in the reinforced area is evaluated from the results of the pullout test. Finally, the validity of the proposed method was verified with results of some centrifuge shaking table tests.

Research Products

• [Journal Article] Centrifuge tests on seismic stability of the damaged geogrid reinforced soil wall (2010)
  • Author(s): Giang H.N., Kuwano J., Izawa J., Seki S.
  • Journal Title: ジオシンセティックス論文集 Vol.25 Pages: 197-202
  • NAID: 130000420919
  • Peer Reviewed
• [Journal Article] Influence of unloadingreloading processes on the pullout resistance of geogrid (2010)
  • Author(s): Giang H.N., Kuwano J., Izawa J., Tachibana S.
  • Journal Title: Geosynthetics International Journal Vol.17, No.4 Pages: 242-249
  • Peer Reviewed
• [Journal Article] Centrifuge modelling of geogrid reinforced soil walls subjected to pseudo-static loading (2010)
  • Author(s): Izawa J., Kuwano J.
  • Journal Title: International Journal of Physical Modelling in Geotechnics Vol.10, No.1 Pages: 1-18
  • Peer Reviewed
• [Journal Article] 補強土壁工法の耐震性に関する課題 (2010)
  • Author(s): 桑野二郎
  • Journal Title: 基礎工 Vol.38, No.2 Pages: 12-17
• [Journal Article] Centrifuge modelling of geogrid reinforced soil walls subjected to pseudo-static loading (2010)
  • Author(s): Izawa, J., Kuwano, J.
  • Journal Title: International Journal of Physical Modelling in Geotechnics Volume: 10 Pages: 1-18
  • Peer Reviewed
• [Journal Article] Influence of unloading-reloading processes on the pullout resistance of geoerid (2010)
  • Author(s): Giang, H.N., Kuwano, J., Izawa, J., Tachibana, S.
  • Journal Title: Geosynthetics International Journal Volume: 17 Pages: 242-249
  • Peer Reviewed
• [Journal Article] Centrifuge tests on seismic stability of the damaged geogrid reinforced soil wall (2010)
  • Author(s): Giang, H.N., Kuwano, J., Izawa, J., Seki, S.
  • Journal Title: ジオシンセティックス論文集 Volume: 25 Pages: 197-202
  • NAID: 130000420919
  • Peer Reviewed
• [Journal Article] 補強土壁工法の耐震性に関する課題 (2010)
  • Author(s): 桑野二郎
  • Journal Title: 基礎工 Volume: 38 Pages: 12-17
• [Journal Article] Shear strain distribution in soil around geogrid during the unloading-reloading pullout test (2009)
  • Author(s): Nguyen G.H., Kuwano J., Izawa J., Seki S., Tachibana S.
  • Journal Title: ジオシンセティックス論文集 Vol.24 Pages: 69-74
  • NAID: 130000157234
  • Peer Reviewed
• [Journal Article] Development of rational seismic design method for geogridreinforced soil wall combined with fibre-mixed soil-cement and its applications (2009)
  • Author(s): Izawa J., Ito H., Saito T., Ueno M., Kuwano J.
  • Journal Title: Geosynthetics International Vol.16, No.4 Pages: 286-300
  • Peer Reviewed
• [Journal Article] Development of rational seismic design method for geogrid-reinforced soil wall combined with fibre-mixed soil-cement and its applications (2009)
  • Author(s): Izawa, J., Ito, H., Saito, T., Ueno, M., Kuwano, J.
  • Journal Title: Geosynthetics International Volume: 16 Pages: 286-300
  • Peer Reviewed
• [Journal Article] Shear strain distribution in soil around geogrid during the unloading-reloading pullout test (2009)
  • Author(s): Nguyen, G.H., Kuwano J., Izawa, J., Seki, S., Tachibana, S.
  • Journal Title: ジオシンセティックス論文集 Volume: 24 Pages: 69-74
  • NAID: 130000157234
  • Peer Reviewed
• [Journal Article] Effects of transverse ribs on pullout resistance and deformation during the unloading-reloading process (2008)
  • Author(s): Nguyen G.H., Kuwano J., Izawa J., Seki S.
  • Journal Title: ジオシンセティックス論文集 Vol.23 Pages: 37-44
  • NAID: 130000142755
  • Peer Reviewed
• [Journal Article] 補強土工法の災害への対応 (2008)
  • Author(s): 桑野二郎
  • Journal Title: ジオシンセティックス技術情報 Vol.24, No.1 Pages: 1-4
  • NAID: 130003812841
• [Journal Article] 補強土工法の災害への対応 (2008)
  • Author(s): 桑野二郎
  • Journal Title: ジオシンセティックス技術情報 24(1) Pages: 1-4
  • NAID: 130003812841
• [Journal Article] Effects of transverse ribs on pullout resistance and deformation during the unloading-reloading proceas (2008)
  • Author(s): Nguyen, G. H., Kuwano J.,Izawa, J. and Seki, S.
  • Journal Title: ジオシンセティックス論文集 23 Pages: 37-44
  • Peer Reviewed
• [Presentation] Evaluation of seismic stability of reinforced soil wall (2011)
  • Author(s): Kuwano J., Izawa J.
  • Organizer: 5th Int.Conf.on Earthquake Geotechnical Engineering
  • Place of Presentation: Santiago.
  • Year and Date: 2011-01-13
• [Presentation] Evaluation of seismic stability of reinforced soil wall (2011)
  • Author(s): Kuwano, J., Izawa, J.
  • Organizer: 5th Int.Conf.on Earthquake Geotechnical Engineering
  • Place of Presentation: チリ・Santiago
  • Year and Date: 2011-01-13
• [Presentation] Seismic stability of submerged reinforced soil walls (2010)
  • Author(s): Kuwano J., Izawa J.
  • Organizer: Int.Symp.on Geotechnical and Geosynthetics Eng.: Challenges and Opportunities on Climate Change
  • Place of Presentation: Bangkok.
  • Year and Date: 2010-12-07
• [Presentation] Seismic stability of submerged reinforced soil walls (2010)
  • Author(s): Kuwano, J., Izawa, J.
  • Organizer: Int.Symp.on Geotechnical and Geosynthetics Eng.Challenges and Opportunities on Climate Change
  • Place of Presentation: タイ Bangkok
  • Year and Date: 2010-12-07
• [Presentation] Centrifuge shaking and tilting table tests on seismic stability of the damaged geogrid-reinforced soil wall (2010)
  • Author(s): Nguyen, G.H., Kuwano J., Izawa, J.
  • Organizer: 12th International Summer Symposium, JSCE
  • Place of Presentation: 船橋
  • Year and Date: 2010-09-18
• [Presentation] Seismic stability of saturated reinforced soil walls (2010)
  • Author(s): Kuwano J., Izawa J.
  • Organizer: 3rd Korea-Japan Geotechnical Engineering Workshop
  • Place of Presentation: Ansan.
  • Year and Date: 2010-09-09
• [Presentation] Seismic stability of saturated reinforced soil walls (2010)
  • Author(s): Kuwano, J., Izawa, J.
  • Organizer: 3rd Korea-Japan Geotechnical Engineering Workshop
  • Place of Presentation: 韓国 Ansan
  • Year and Date: 2010-09-09
• [Presentation] Evaluation of the geogrid reinforced soil walls with unloading-reloading process (2010)
  • Author(s): Nguyen, H.G., Matsutani S., Kuwano, J., Izawa, J., Tachibana, S.
  • Organizer: 第45回地盤工学研究発表会
  • Place of Presentation: 松山
  • Year and Date: 2010-08-20
• [Presentation] Evaluation of slip surface formation in saturated backfill of reinforced soil walls based on wall displacement (2010)
  • Author(s): Kuwano J., Izawa J.
  • Organizer: 7th International Conference on Physical Modelling in Geotechnics
  • Place of Presentation: Zurich.
  • Year and Date: 2010-06-28
• [Presentation] Evaluation of slip surface formation in saturated backfill of reinforced soil walls based on wall displacement (2010)
  • Author(s): Kuwano, J., Izawa, J.
  • Organizer: 7th International Conference on Physical Modelling in Geotechnics
  • Place of Presentation: スイス・Zurich
  • Year and Date: 2010-06-28
• [Presentation] Evaluation for damage of geogrid reinforced soil walls subjected to earthquakes (2010)
  • Author(s): Izawa J., Kuwano J.
  • Organizer: 9th International Conference on Geosynthetics
  • Place of Presentation: Guaruja.
  • Year and Date: 2010-05-25
• [Presentation] Evaluation for damage of geogrid reinforced soil walls subjected to earthquakes (2010)
  • Author(s): Izawa, J., Kuwano, J.
  • Organizer: 9th International Conference on Geosynthetics
  • Place of Presentation: ブラジル Guaruja
  • Year and Date: 2010-05-25
• [Presentation] Evaluation of the confining effect on geogrid pullout test under unloading-reloading history (2010)
  • Author(s): Nguyen G.H., Kuwano J., Izawa J., Seki S.
  • Organizer: 9th International Conference on Geosynthetics
  • Place of Presentation: Guaruja.
  • Year and Date: 2010-05-24
• [Presentation] Evaluation of the confining effect on geogrid pullout test under unloading-reloading history (2010)
  • Author(s): Nguyen, G.H., Kuwano, J., Izawa, J., Seki, S.
  • Organizer: 9th International Conference on Geosynthetics
  • Place of Presentation: ブラジル Guaruja
  • Year and Date: 2010-05-24
• [Presentation] Evaluation of damage in geogrid reinforced soil walls based on wall displacement (2010)
  • Author(s): Izawa, J., Kuwano, J.
  • Organizer: 7th Int.Conf.on Urban Earthquake Engineering and 5th Int.Conf.on Earthquake Engineering
  • Place of Presentation: 東京
  • Year and Date: 2010-03-04
• [Presentation] Evaluation of damage in geogrid reinforced soil walls based on wall displacement (2009)
  • Author(s): Izawa J., Kuwano J.
  • Organizer: 17th International Conference on Soil Mechanics and Geotechnical Engineering
  • Place of Presentation: Alexandria.
  • Year and Date: 2009-10-08
• [Presentation] Evaluation of damage in geogrid reinforced soil walls based on wall displacement (2009)
  • Author(s): Izawa, J., Kuwano, J.
  • Organizer: 17th International Conference on Soil Mechanics and Geotechnical Engineering
  • Place of Presentation: エジプト・アレクサンドリア
  • Year and Date: 2009-10-08
• [Presentation] Interaction between geogrid and soil during the pullout test under unloading-reloading process (2009)
  • Author(s): Nguyen, G.H., Kuwano J., Izawa, J., Seki, S.
  • Organizer: 11th International Summer Symposium, JSCE
  • Place of Presentation: 東京
  • Year and Date: 2009-09-11
• [Presentation] Shear strain distribution in soil around geogrid during the unloading-reloading pullout test (2009)
  • Author(s): Nguyen G.H., Kuwano J., Izawa J., Seki S.
  • Organizer: First African Regional Conference of the International Geosynthetics Society
  • Place of Presentation: Cape Town.
  • Year and Date: 2009-09-03
• [Presentation] Shear strain distribution in soil around geogrid during the unloading-reloading pullout test (2009)
  • Author(s): Nguyen, G.H., Kuwano J., Izawa, J., Seki, S.
  • Organizer: First African Regional Conference of the International Geosynthetics Society
  • Place of Presentation: 南アフリカ・ケープタウン
  • Year and Date: 2009-09-03
• [Presentation] ジオグリッド形状が除荷・再載荷履歴を伴う引抜き特性に及ぼす影響 (2009)
  • Author(s): Nguyen,G., 竹内康就, 桑野二郎, 布施優
  • Organizer: 土木学会第64回年次学術講演会
  • Place of Presentation: 福岡
  • Year and Date: 2009-09-02
• [Presentation] Confining effects during pullout test with unloading-reloading process in Toyoura sand (2009)
  • Author(s): Nguyen, H.G., Fuse, Y., Kuwano, J., Izawa, J., Seki, S.
  • Organizer: 第44回地盤工学研究発表会
  • Place of Presentation: 横浜
  • Year and Date: 2009-08-20
• [Presentation] Effects of geogrid shapes on pullout resistance in Toyoura sand (2008)
  • Author(s): Nguyen, G. H., Kuwano J.,Izawa, J. and Seki, S.
  • Organizer: 10th International Summer Symposium, JSCE
  • Place of Presentation: 東京
  • Year and Date: 2008-09-18
• [Presentation] Evaluation of damage of geogrid reinforced soil wall based on wall displacement (2008)
  • Author(s): Izawa J., Kuwano J.
  • Organizer: 4th European Geosynthetics Conference
  • Place of Presentation: Edinburgh.
  • Year and Date: 2008-09-10
• [Presentation] Evaluation of damage of geogrid reinforced soil wall based on wall displacement (2008)
  • Author(s): IzaWa, J. and Kuwano,J
  • Organizer: 4th European Geosynthetics Conference
  • Place of Presentation: Edinburgh
  • Year and Date: 2008-09-10
• [Presentation] Effects of unloading-reloading on pullout resistance of geogrid in Toyoura sand (2008)
  • Author(s): Nguyen, H.G., Araki, Y., Saito, K., Kuwano, J., Izawa, J. and Seki, S
  • Organizer: 第43回地盤工学研究発表会
  • Place of Presentation: 広島
  • Year and Date: 2008-07-09