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Determination of Consolidation Constants by Use of Standard Oedometer Tests for the Purpose to Construct a New Constitutive Equation Taking Time effects into Consideration.

Research Project

Project/Area Number 08455219
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Geotechnical engineering
Research InstitutionYokohama National University

Principal Investigator

IMAI Goro  Yokohama National University, Faculity of Engineering, Prof., 工学部, 教授 (70126374)

Co-Investigator(Kenkyū-buntansha) PRADHAN Tej B.S.Pradhan  Yokohama National University, Faculity of Engineering, Assoc.Prof. (70238707)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥7,300,000 (Direct Cost: ¥7,300,000)
Fiscal Year 1997: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1996: ¥5,000,000 (Direct Cost: ¥5,000,000)
Keywordsclay / consolidation / primary consolidation / secondary consolidation / standard oedometer test / Creep / Consolidation constant / 構成式 / 弾塑性 / 粘性 / 過圧密 / 先行圧密応力
Research Abstract

Consolidation constants should be defined by use of effective stress. However, because of no measurement of pore water pressure. the constants have not been determined in terms of effective stress as continuously changing indices. For the purpose to overcome this barrier, a new testing method artificially varying pore water pressures at the top and bottom surfaces of a specimen was developed in this study. By use of the new method, effective- stress analyses have been proved to be applicable even for step-loading type tests, arid compression behaviors represented by C_s and C_c have been precisely examined. Furthermore. a new type of constant-gradient consolidation test procedure was developed based on the idea of water pressure control, and the much more reliable compression constants as well as permeability behaviors represented by the coettiwent of permeability, k, have been determined in the terms of continuously changing effective stress.
Based on the results stated above, a firm foundation on which the latest constitutive equation could be constituted has been obtained.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (41 results)

All Other

All Publications (41 results)

  • [Publications] Imai.G.Hawalader.B.C.: "“Deformation and Progressive Failure in Geomechanics"" Analytical examination of End-Of-Primary(EOP) using elasto-viscoplastic consolidation model, Proc.of IS-NAGOYA '97.489-494 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai.G.Hawalader.B.C.: "Computer Methods and Advances in Geomechanics" An elasto-viscoplastic analysis of self-weight consolidation during continuous sedimentation, Proc.of the 9th Int.Conf.On Computer Methods and Advances in Geomechanics,Wuhan,China.1065-1070 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai.G.Hawalader.B.C.: "Fffect of viscosity on the process of consolidation with vertical drains" Proc.of the 8th offshore and polar Engineering Conference. Montreal, Canada.1998(accepted).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai.G.,Tanaka.Y.: "A new consolidation test method with variable pore-water pressure under constant load" Proc.of ISLT '98 SAGA. 107-295 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 田中洋輔,今井五郎: "圧密の載荷・除荷試験において背圧が間隙水圧および変位に及ぼす影響" 土木学会第51回年次学術講演会概要集. III-A174. 348-349 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 今井五郎,田中洋輔,辻村崇: "オエドメター試験から得られた粘土の除荷・再載荷過程の応力-歪挙動" 第32回地盤工学研究発表会(熊本). No.211. 423-424 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 今井五郎,辻村崇,野津光夫: "間隙水圧増加によるオエドメター除荷試験の試み" 第32回地盤工学研究発表会(熊本). No.212. 425-426 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Hawlader.B.C.,Imai.G.: "Effect of viscosity during self-weight consolidation of fresh sedimented soil" Proc.of the 32nd Japan national conference on geotechnical engineering. No.216. 433-434 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai.G.,Hawlader.B.C.: "self-weight consolidation in a clay layer at a constant rate of increasing thickness" Proc.of the 52nd annual conference of the Japan society of civil engineers. III-A172. 344-345 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 今井五郎,田中洋輔: "間隙水圧制御による定動水匂配圧密試験" 第33回地盤工学研究発表会(山口). No.228. 461-462 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 今井五郎,藤野秀隆,田中洋輔: "段階載荷試験による粘性土の膨潤指数" 第33回地盤工学研究発表会(山口). No.229. 463-464 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 今井五郎,吉川智勝,田中洋輔,藤野秀隆: "先行圧密応力付近の載荷圧下での二次圧密挙動" 第33回地盤工学研究発表会(山口). No.230. 465-466 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 今井五郎,加藤卓,プラダンテージ,田端憲太郎,田中洋輔: "三軸試験装置を用いた定ひずみ K 圧密試験の試み" 第33回地盤工学研究発表会(山口). No.232. 469-470 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai.G.Hawlader.B.C.: "Yielding and pre-yielding behavior of soil in one dimensional consolidation" Proc.of the 33^<rd> Japan national conference on geotechical engineering. No.238. 481-482 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 田中洋輔,今井五郎: "定動水勾配圧密試験で得られた圧密降伏挙動" 土木学会第53回年次学術講演会概要集. III-A198. 394-395 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai, G., Hawlader, B.C.: "Analytical examination of End-Of-Primary (EOP) using elasto-viscoplastic consolidation model" Proc.of IS-NAGOYA '97, "Deformation and Progressive Failure in Geomechanics.". 489-494 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai, G., Hawlader, B.C.: "An elasto-viscoplastic analysis of self-wieght consolidation during continuous sedimentation" Proc.of the 9th Int.Conf.On Computer Methods and Advances in Geomechanics, Wuhan, China, "Computer Methods and Advances in Geomechanics". 1065-1070 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai, G., Hawlader, B.C.: "Effect of viscosity on the process of consolidation with vertical drains" Proc.of the 8th offshore and Polar Engineering Conference, Montreal, Canada. (accepted). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai, G., Tanaka, T.: "A new consolidation test method with variable pore-water pressure under constant load" Proc.of ISLT '98 SAGA. 107-295 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai, G., Y,Tanaka: "Effect of back pressure on pore-water pressure and displacement in unloading-reloading process of consolidation" Proc.of the 51-st Annual Couf.of the Japan Soc.of Civil Engineers. Vol.3-A,No.174. 348-348 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai, G., Tanaka. , Tsujimura, T.: "Stress-straiu behovior during unloading-reloading process in oedmeter test" The 32-nd Japan National Conf.on S.M.F.E.No.213. 423-424 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai, G., Tsujimura, T.: "Study of unloading consolodation tests by back pressure increasing" The 32-nd Japan National Conf.on S.M.F.E.No.212. 425-426 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Hawlader, B.C., Imai, G.: "Effect of viscosity during self-weight consolidation of fresh sedimented soil" Proc.of the 32nd Japan national conference on geotechnical engineering. No.216. 433-434 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai, G., Hawlader, B.C.: "Self-weight consolidation in a clay layer at a constant rate of increasing thickness" Proc.of the 52nd annual conference of the Japan society of civil engineers. III-A172. 344-345 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai, G., Tanaka, Y.: "Controlled gradient test by pore water pressure controlling method." The 33-rd Japan National Conf.on S.M.F.E.No.228. 461-462 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai, G., Fujino, H., Tanaka, Y.: "Swelling index properties of a clay obtained by step loading consolidation tasts" The 33-rd Japan Nat.Conf.on S.M.F.E.No.229. 463-464 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai, G., Yoshikawa, T., Tanaka, T.: "Secondary consolidation behaviors under loads near preconsolidation pressure" The 33-rd Japan Nat.Conf.on S.M.F.E. No.230. 465-466 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai, G., Kato, T., Pradhan, T., Tabata, K., Tanaka, Y.: "Study of constant strain K0-consolidation tests using triaxial apparatus." The 33-rd Japan Nat.Conf.on S.M.F.E. No.232. 469-470 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imai, G., Hawlader, B.C.: "Yielding and pre-yielding behavior of soil in one dimensional consolidation" Proc.of the 33^<rd> Japan national conference on geotechnical engineering. No.238. 481-482 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tanaka, Y., Imai, G.: "Consolidation vielding behavior observed by constant gradient consolidation test" Proc.of the 53-rd Annual Conf-on the Japan Soc.of Civil Engineers. Vol.3-A,No.198. 394-395 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] G.Imai & B.C.Hawlader: "Effect of viscosity on the process of consolidation with vertical drains" Proc.of 8th Int.Offshore and Polar Engineering Conference-ISOPE'98-,Montreal,Canada. Vol.1. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] G.Imai & B.C.Hawlader: "Self-weight consolidation in a clay layer at a constant rate of increasing thickness" Proc.of 52nd Annual Conference of the Japan Soc.of Civil Engineers. Vol.3-A. 344-345 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] G.Imai & B.C.Hawlader: "Yielding and pre-yielding behavior of soil in one dimensional consolidation" Proc.of 33rd Annual Conference of the Japan Geotechnical Societies. Vol.1. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 今井五郎・田中洋輔: "間隙水圧制御による定動水勾配圧密試験" 第33回地盤工学研究発表会概要集. 1. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 今井五郎・藤野秀隆・他: "段階載荷試験による粘性土の膨潤指数" 第33回地盤工学研究発表会概要集. 1. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 今井五郎・吉川智勝・他: "先行圧密応力付近の載荷圧下での二次圧密挙動" 第33回地盤工学研究発表会概要集. 1. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] G.Imai & B.C.Hawlader: "Analytical examination of end-of-primary (EOP) using elasto-viscoplastic consolidation model" Proc.of Intern.Symop.on Numerical methods in geotechniques-IS Nagoya'97-. Vol.1(受理済). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] G.Imai & B.C.Hawlader: "An elasto-viscoplastic analysis of self weight consolidation during continuous sedimentation(受理済)" Proc.of Intern,Conf.on Nemerical analyses in geotechnical engineering (Wuhan). Vol.1. (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] B.C.Hawlader,G.Imai: "Effect of viscosity during seif-weight consolidation of fresh sedimented soil" Proc.32th Annual meeting of Japan Geotecnical Sosiety. Vol.3-1. (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 今井五郎,辻村崇,野津光夫: "間隙水圧増加によるオエドメター除荷実験の試み" 第32回地盤工学会研究発表会概要集. 3の1. (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 今井五郎,田中洋輔,辻村崇: "オエドメター試験から得られた粘土の除荷・再載荷過程の応力-歪挙動" 第32回地盤工学会研究発表会概要集. 3の1. (1997)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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