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Study on Stabilizing Mechanism of Deep Excavation in Soft Clay Groud

Research Project

Project/Area Number 07650581
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Geotechnical engineering
Research InstitutionOSAKA SANGYO UNIVERSITY

Principal Investigator

TAMANO Tomio  OSAKA SANGYO UNIVERSITY, 工学部, 教授 (10268245)

Co-Investigator(Kenkyū-buntansha) SANO Ikuo  大阪産業大学, 工学部, 助教授 (20127088)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1996: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1995: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsExcavation / Soft Ground / Earth Pressure / Water Pressure / Trench / Clay / Field Test / 軟弱粘土 / 石垣 / 静止土圧 / 主働土圧 / 受働土圧 / 掘削 / 受動土圧
Research Abstract

In recent years, the utilization of underground spaces has become a recognized necessity and deep excavations have been carried out extensively in urban areas. In such cases, it is important to elucidate the stabilization mechanism of the excavation. Particularly in the case of ground consisting of a soft clay, some aspects of its mechanical behavior remain to be studied.
The purpose of this report is to contribute the design of lateral supporting systems for excavation. The following two subjects were mainly studied.
(1) Earth and water pressures acting on braced walls in soft clay
The mechanical behavior of earth and water pressures acting on the back-and excavation-side braced walls in soft clay was investigated based on the results of detailed field measurements. Because mechanical behavior strongly depends on such factors as wall deformation, the groundwater state, and the deformation and strength properties of the soil, this study clarifies the relationship between mechanical behavi … More or and these factors. In particular, passive earth pressure on the excavation-side wall is separated into the two factors as an incremental term related to wall displacement towards the excavation side and a decremental term related to decrease of overburden pressure due to excavation.
(2) Stabilizing mechanism of slurry trench excavation in soft clay
The stabilizing mechanism of a slurry trench excavation in soft clay under normal consolidation was investigated. Diaphragm wall construction, using the slurry trench method, is increasingly being applied to soft clay. To ensure the reliability of this method, it is important to clarify the stabilizing mechanism of slurry trench excavation. In this research it was recognized that the mechanism of trench wall stability in soft clay was to be studied. Consequently, normally consolidated soft clay yeilds only a slight trench displacement which achieves a balance between slurry and lateral pressures, thus permitting use of the diaphragm wall employing the slurry trench method. Less

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] 玉野富雄: "軟弱粘土地盤における土留め背面側に作用する土圧・水圧の力学挙動" 土木学会論文集. No.516. 53-61 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 玉野富雄: "Stabilizing mechanism of slurry trench walls in soft clay" 国際土質基礎工学会第10回アジア地域会議. Vol.1. 357-360 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 玉野富雄: "大深度地下工事に際しての地下水状態調査" 地盤工学会誌. Vol.43 No.9. 33-35 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 玉野富雄: "Numerical analysis of deep excavation" Proc.of the 5th Int.Symp.on Numerical Models Geomechanics. Vol.1. 539-544 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 玉野富雄: "Earth and Water pressures acting on the excavation side of braced wall in soft ground" Proc.of Int.Symp.on Ground Aspect of Umground construction in soft ground (ISSMFE-TC28). 149-159 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 玉野富雄: "Stability of slurry trench wall in soft clay" Soils and Foundations. 36巻2号. 101-110 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 玉野富雄: "Earth Pressure Balanced Shield Tunneling for Preservation of Environment" Proc.of the 22nd ITA Congress. 1. 219-228 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Tamano・S.Fukui・H.Suzuki・H.Mtsuzawa・K.Ueshita: "MCHANICAL BEHAVIORS OF EARTH AND WATERPRESSURES ACTING ON OUTSIDE OF BRACED WALLS IN SOFT CLAYS" Proc.of JSCE. No.516. 53-61 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Tamano・S.Fukui・H.Suzuki・K.Heshita: "Stabilizing mechanism of slurr trench walls in soft clay" Proc.of the 1th ARC on SMFE,ISMFE. Vol.1. 357-360 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Tamano・S.Ono・S.Fukui・H.Suzuki: "Measurement Cases of GroundWater Conditions in Deep Underground Construction Work" Jour.of JGS (Tsuchi-to Kiso). Vol.43 No.9. 33-35 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Tamano・H.Tsuboi・K.Heshita・S.Fukui: "Numerical analysis of deep excavation" Proc.of the 5th int.Symp.on Numerical Models Geomechanics. Vol.1. 539-544 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Tamano・S.Fukui・S.Mizutani・H.Tsuboi・M.Hisatake: "Earth and Water pressures acting on the excavation side of braced wall in sof ground" Proc.of Int.Symp.on Ground Aspect of Umground construction in soft ground (ISSMFE-TC28). Vol.1. 149-159 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Tamano・S.Fukui・H.Suzuki・K.Ueshita: "sutabilitiy of slurry trench wall in soft clay" Soils and Foundations. Vol.32, No.2. 101-110 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M.Hra・H.Ttsuta・M.Hisatake・T.Tamano・Y.Shimamoto: "Earth Pressur Balanced Shield Tunneling for Preservation of Envirom" Proc.of.the 22nd ITA Congress. Vol.1. 219-228 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 玉野 富雄: "Earth and Water Pressures acting on the Excavation Side of Braced Valls in Soft Clay" Proc.of Int.Symp.on Geotechnical Aspect of Underground Construction in Soft Ground,ISSMFE (TC28). 149-159 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 玉野 富雄: "Stability of Slurry Trench Wall in Soft Clay" Soils and Foundations. 36. 101-110 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 玉野 富雄: "Earth Pressure Balanced Shield Tunneling for Preservation of Environment" Proc.of the 22nd ITA Congress. 1. 219-228 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] "Mechanical properties of ash generated in sewage sludge incineration and its effectiveuse" Proc.of the 2nd Int.Congress on Environmental Geomechanics. 2. 721-926 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 玉野 富雄: "沖積層の開削を考える" 平成8年度地盤工学会関西支部講話会. 1-1 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 玉野 富雄: "軟弱粘土地盤における土留め背面側に作用する土圧・水圧の力学挙動" 土木学会論文集. No.516. 53-61 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 玉野 富雄: "Stabilizing mechanism of slurry trench walls in soft clay" 国際土質基礎工学会第10回アジア地域会議. Vol.1. 357-360 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 玉野 富雄: "大深度地下工事に際しての地下水状態調査" 地盤工学会誌. Vol.43, No.9. 33-35 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 玉野 富雄: "Numerical analysis of deep excavation" Proc.of the 5th Int. Symp. on Numerical Models Geomechanics. Vol.1. 539-544 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 玉野 富雄: "Earth and Water pressures acting on the excavation side of braced wall in soft ground" Proc.of Int. Symp. on Ground Aspect of Umground construction in soft ground(ISSMFE-TC28). (in print). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 玉野 富雄: "Stability of slurry trench wall in soft clay" Soils and Foundations. 36巻2号(in print). (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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