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Cost reduction of diaphragm wall excavation using air foam and case record

Research Project

Project/Area Number 16560437
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

AKAGI Hirokazu  Waseda University, Faculty of Science and Engineering, Professor, 理工学術院, 教授 (30150965)

Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2005: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2004: ¥1,800,000 (Direct Cost: ¥1,800,000)
KeywordsTrench / Excavation / Bentonite Clay / Stabilization / Cost Reduction / Soil Wasete / Environment / 土構造物 / 掘削 / 安定液 / 地盤環境
Research Abstract

A novel stabilizing liquid using air foam rather than bentonite clay slurry, i.e. an air foam suspension method, was employed in order to stabilize the trench wall surface during a diaphragm wall excavation. This method reduces the construction costs of working on an underground diaphragm wall. An air foam suspension is created by mixing excavated soil with air foam made from a surfactant. The performance of the air foam suspension depends on its density and consistency, that is, its table flow value(TF). By comparing the trench stabilization capacity of an air foam suspension with that of bentonite clay slurry in model tests, the performance of air foam suspension was confirmed. A cost evaluation of the use of air foam suspension for diaphragm wall excavation is presented with an actual trial construction case record, which shows the superiority of air foam suspension to bentonite clay slurry as a stabilizing liquid.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (8 results)

All 2006 2005 2003 2000

All Journal Article (6 results) Patent(Industrial Property Rights) (2 results)

  • [Journal Article] Cost reduction of diaphragm wall excavation using air foam and case record2006

    • Author(s)
      H.Akagi, Y.Kondo, T.Nakayama, H.Naoe
    • Journal Title

      Proc. 5th International Congress on Environental Geotechnics

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Cost reduction of diaphragm wall excavation using air foam and case record2006

    • Author(s)
      H.Akagi, Y.Kondo, T.Nakayama, H.Naoe
    • Journal Title

      Proc.5th International Congress on Environmental Geotechnics

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Cost reduction of diaphragm wall excavation using air foam2005

    • Author(s)
      Y.kondo, T.Nakayama, H.naoe, H.Akagi
    • Journal Title

      Proc. 5th International Conference of TC28 of the ISSMGE, Geotechnical Aspects of Underground Construction in Soft Ground

      Pages: 413-418

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Cost reduction of diaphragm wall excavation using air foam2005

    • Author(s)
      Y.Kondo, T.Nakayama, H.Naoe, H.Akagi
    • Journal Title

      Proc.5th International Conference of TC28 of the ISSMGE, Geotechnical Aspects of Underground Construction in Soft Ground

      Pages: 413-418

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Cost reduction of diaphragm wall excavation using air foam2005

    • Author(s)
      Y.Kondo, T.Nakayama, H.Naoe, H.Akagi
    • Journal Title

      Proc.5th International Geotechnical Symposium on Geotechnical Aspects of Underground Construction in Soft Ground Vol.1

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 気泡を利用した地中連続壁掘削用安定液の開発とコスト評価2003

    • Author(s)
      赤木寛一
    • Journal Title

      基礎工 Vol.31, No.7

      Pages: 22-25

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Patent(Industrial Property Rights)] 安定液組成物2000

    • Inventor(s)
      赤木寛一, 近藤義正, 今井金次
    • Industrial Property Rights Holder
      早稲田大学, 他
    • Filing Date
      2000-01-21
    • Acquisition Date
      2005-12-14
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Patent(Industrial Property Rights)] 安定液組成物2000

    • Inventor(s)
      赤木 寛一, 近藤 義正, 今井 金次
    • Industrial Property Rights Holder
      早稲田大学 他
    • Filing Date
      2000-01-21
    • Acquisition Date
      2005-12-14
    • Related Report
      2005 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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