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Research of the behavior for buried flexible outlet conduit under the earth dam

Research Project

Project/Area Number 14360143
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Irrigation, drainage and rural engineering/Rural planning
Research InstitutionKobe University

Principal Investigator

KAWABATA Toshinori  Kobe University, Faculty of Agriculture, Associate Professor, 農学部, 助教授 (20335425)

Co-Investigator(Kenkyū-buntansha) UCHIDA Kazunori  Kobe University, Faculty of Agriculture, Professor, 農学部, 教授 (80111946)
TANAKA Tsutomu  Kobe University, Faculty of Agriculture, Professor, 農学部, 教授 (20144602)
Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥15,100,000 (Direct Cost: ¥15,100,000)
Fiscal Year 2004: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2003: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2002: ¥10,800,000 (Direct Cost: ¥10,800,000)
KeywordsGeotechnical Engineering / Underground Structure / Model Tests / Earth Pressure / Settlement / Irrigation Pond / Numerical Analysis
Research Abstract

The behavior of buried flexible pipe is influenced to a considerable extent by the properties of the backfill materials. Recently, geosynthetics are commonly used in retaining wall for reinforcement. And flexible pipe is used for drainage in such embankment.
However, the behavior of buried flexible pipe in the retaining wall reinforced by geosynthetics is not clear.
Experiments using a middle-sized steel test pit were carried out to examine the behavior of a flexible pipe buried in a reinforced embankment with settlement. A bi-axial load cell was developed in order to accurately measure the load acting on the buried pipe, and a model pipe, which was equipped with 20 such load cells was made.
The result showed that with settlement of the pipe, the arching action of the backfill progress, and the vertical load that acts on the pipe greatly decreases.
In addition, it was found that when backfill with sand and geogrid was used, the vertical load act on the pipe was distributed by the geogrid, hence decreasing by approximately 25% the overburden load.
In the future, it is necessary to examine the effects of the installed position of the geogrid and number of layers of the geogrid.

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (16 results)

All 2005 2004 2003 Other

All Journal Article (15 results) Publications (1 results)

  • [Journal Article] Lateral Loading Experiments on Thrust Protecting Method for Buried Bend with Geogrid2005

    • Author(s)
      Toshinori, Kawabata
    • Journal Title

      Proceedings of Geofrontiers 2005, ASCE Austin, TX, USA GSP140

      Pages: 1-8

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Uplift Mechanism of Underground Structures in Dry Sand Subjected to Cyclic Simple Shear by DEM2005

    • Author(s)
      Toshinori, Kawabata
    • Journal Title

      Proceedings of 15th International Offshore and Polar Engineering Conference, ISOPE2005, Seoul, Korea (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Lateral Loading Experiments on Thrust Protecting Method for Buried Bend with Geogrid2005

    • Author(s)
      Kawabata1, T
    • Journal Title

      Proceedings of Geofrontiers 2005, ASCE GSP140

      Pages: 1-8

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Lateral Loading Tests for Buried Pipe with Geosynthetics2004

    • Author(s)
      Toshinori, Kawabata
    • Journal Title

      Proceedings of GeoTrans, ASCE, LA, USA Vol.1

      Pages: 609-616

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Distribution of Traffic Loads for Shallowly Buried Pipe by D.E.M.Analyses2004

    • Author(s)
      Toshinori, Kawabata
    • Journal Title

      Proceedings of Pipeline 2004, ASCE, SanDiego, USA CD Dir.9B

      Pages: 1-10

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Lateral Loading Tests for Buried Pipe with Geosynthetics2004

    • Author(s)
      Kawabata, T., Uchida, K., Ling, H.I., Nakase, H., Sawada, Y., Hirai, T., Saito, K.
    • Journal Title

      Proceedings of Geo-Trans 2004 (ASCE) Vol.1

      Pages: 609-616

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Lateral Loading Tests for Buried Pipe with Geosynthetics2004

    • Author(s)
      Kawabata1, T
    • Journal Title

      Proceedings of Geo-Trans 2004, ASCE Vol.1

      Pages: 609-616

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Experiments on Buried Flexible Pipe Using Backfill of Cover with Geosynthetics2003

    • Author(s)
      Toshinori, Kawabata
    • Journal Title

      New Pipeline Technologies, Security, and Safety, ASCE Vol.2

      Pages: 1271-1278

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] D.E.M.Analyses on Behavior of Shallowly Buried Pipe Subject to Traffic Loads2003

    • Author(s)
      Toshinori, Kawabata
    • Journal Title

      New Pipeline Technologies, Security, and Safety, ASCE Vol.2

      Pages: 1218-1227

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Experiments on Buried Flexible Pipe Using Backfill of Cover with Geosynthetics2003

    • Author(s)
      Kawabata, T., Uchida, K., Hirai, T., Mohri, Y., Ling H.I., Koyama, N.
    • Journal Title

      New Pipeline Technologies, Security, and Safety (ASCE) Vol.2

      Pages: 1271-1278

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] D.E.M. Analyses on Behavior of Shallowly Buried Pipe Subject to Traffic Loads2003

    • Author(s)
      Kawabata, T., Uchida, K, Ariyoshi, M., Nakase, H.Mohri, Y., Ling, H.I
    • Journal Title

      New Pipeline Technologies, Security, and Safety (ASCE) Vol.2

      Pages: 1218-1227

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Experiments on Buried Flexible Pipe Using Backfill of Cover with Geosynthetics2003

    • Author(s)
      Kawabata, T
    • Journal Title

      New Pipeline Technologies, Security, and Safety, ASCE

      Pages: 1271-1278

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Distribution of Traffic Loads for Shallowly Buried Pipe by D.E.M. Analyses

    • Author(s)
      Kawabata, T., Ariyoshi, M., Uchida, K., Ling, H.I., Nakase, H., Sawada, Y., Mohri, Y.
    • Journal Title

      Proceedings of Pipeline 2004 (ASCE SanDiego, USA) CD Dir 9B

      Pages: 1-10

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Lateral Loading Experiments on Thrust Protecting Method for Buried Bend with Geogrid

    • Author(s)
      Kawabata, T., Uchida, K., Sawada, Y.Hirai, T., Saito, K.
    • Journal Title

      Proceedings of Geofrontiers 2005 (ASCE, Austin, TX, USA) Vol.GSP140

      Pages: 1-8

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Uplift Mechanism of Underground Structures in Dry Sand Subjected to Cyclic Simple Shear by DEM

    • Author(s)
      Kawabata, T., Uchida, K., Ooishi, J., Nakase, H.
    • Journal Title

      Proceedings of 15th International Offshore and Polar Engineering Conference, ISOPE2005, Seoul, Korea (now printing)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] Kawabata, T: "Experiments on Buried Flexible Pipe Using Backfill of Cover with Geosynthetics"New Pipeline Technologies, Security, and Safety, ASCE. 1271-1278 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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