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2005 Fiscal Year Final Research Report Summary

Development of undisturbed sampling method using thick water-soluble polymer

Research Project

Project/Area Number 16360235
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Geotechnical engineering
Research InstitutionNational University Corporation Yokohama National University

Principal Investigator

TANI Kazuo  Yokohama National University, Faculty of Engineering, Professor, 大学院・工学研究院, 教授 (50313466)

Project Period (FY) 2004 – 2005
KeywordsSampling / Undisturbed sample / Drilling / Polymer
Research Abstract

A new sampling method using thick water-soluble polymer was invented to obtain undisturbed samples from even difficult ground. The objectives of this study were to understand the characteristics of this method, to evaluate the polymer immersion effect, to allow this method for deep ground and to apply this method for down-hole triaxial test. The following conclusions were drawn.
1)Measurement of normal and shear stresses on the drill-core surface was made by the core barrel rotation experiments. The results revealed that, the shear stress was minimal while normal stress of several kilo Pascal's was recorded due to Wisenberg effect of the thick polymer. In addition, seepage tests were conducted to elucidate seepage characteristics of polymer into sand.
2)A series triaxial compression tests were conducted on sand specimen with polymer. The test results demonstrated that, there was practically no influence on the angle of internal friction whereas increase of the cohesion value was limited as no more than several kilo Pascal's.
3)A core barrel was developed for this polymer sampling from deep ground, and an attempt was made to obtain undisturbed samples from unconsolidated sand layers. Continuous drill cores of 100 millimeter diameter apparently with no sign of disturbance were obtained from 10 to 22 meters deep ground. Moreover, a larger diameter core barrel of 200 millimeter diameter was also successfully developed for the polymer sampling from non-uniform ground including large gravels or large pieces of sea shells.
4)A technique to prepare the test specimens for down-hole triaxial tests was developed utilizing this polymer sampling method. Trial attempts on mortar ground demonstrated that cylindrical specimens can be accurately drilled in the ground by this technique.

  • Research Products

    (14 results)

All 2006 2005 2004

All Journal Article (13 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] 差動トランス式変位計測装置を利用した新しい原位置三軸試験装置の開発2006

    • Author(s)
      池野谷尚史, 鶴 俊太郎, 金子 進, 立川日出男, 谷 和夫
    • Journal Title

      第35回岩盤力学に関するシンポジウム

      Pages: 145-148

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 水溶性ポリマーの濃厚溶液を利用した乱さない試料のサンプリング方法2006

    • Author(s)
      谷 和夫, 金子 進
    • Journal Title

      土と基礎 第54巻・第5号

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Development of new in-situ triaxial test apparatus using LVDT.2006

    • Author(s)
      Ikenoya, T., Tsuru, T., Kaneko, S., Tachikawa, H., Tani, K.
    • Journal Title

      Proc.35th Domestic Symposium on Rock Mechanics, Jap.Soc.of Civil Engineers(in Japanese)

      Pages: 145-148

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Undisturbed sampling method using thick water-soluble polymer.2006

    • Author(s)
      Tani, K., Kaneko, S.
    • Journal Title

      Tsuchi-to Kiso, Jap.Geotech.Soc.(in Japanese) Vol.54, No.5

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 水溶性ポリマーを用いたサンプリングにより採取された貝殻混じり砂の力学特性2005

    • Author(s)
      池野谷尚史, 山田眞一, 金子 進, 谷 和夫
    • Journal Title

      第50回地盤工学シンポジウム

      Pages: 129-136

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 水溶性ポリマーの濃厚溶液を利用したサンプリング方法の深部地盤への適用2005

    • Author(s)
      金子 進, 谷 和夫
    • Journal Title

      第40回地盤工学研究発表会

      Pages: 183-184

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] ハイドレート層の力学特性を調べるための原位置試験の提案2005

    • Author(s)
      谷 和夫
    • Journal Title

      2005年度資源・素材学会春季大会 I-3411

      Pages: 195-196

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Mechanical characteristics of sand including sea shells obtained by sampling method using water-soluble polymer.2005

    • Author(s)
      Ikenoya, T., Yamada, S., Kaneko, S., Tani, K.
    • Journal Title

      Proc.50th Domestic Symposium on Geotechnical Engineering, Jap.Geotech.Soc.(in Japanese)

      Pages: 129-136

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Attempt of sampling method using thick water-soluble polymer to deep ground.2005

    • Author(s)
      Kaneko, S., Tani, K.
    • Journal Title

      Proc.40th JGS Symposium, JGS(in Japanese)

      Pages: 183-184

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Proposal of in-situ test to investigate mechanical properties of hydrate layers.2005

    • Author(s)
      Tani, K.
    • Journal Title

      Proc.2005 Spring JSMM Symposium, Jap.Soc.of Min. & Materials(in Japanese) I-3411,

      Pages: 195-196

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Transducer and method for axial displacement measurement.2005

    • Author(s)
      Tani, K., Ikenoya, T., Tsuru, T.
    • Journal Title

      Japanese Patent Application(in Japanese) 2005-303764

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Development of instrumented drilling technology for geotechnical investigation of rock mass2004

    • Author(s)
      Tani, K., Kaneko, S., Yoshida, Y., Ikemi, M.
    • Journal Title

      Proc.3rd Asian Rock Mechanics Symposium,

      Pages: 1181-1186

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Development of instrumented drilling technology for geotechnical investigation of rock mass.2004

    • Author(s)
      Tani, K., Kaneko, S., Yoshida, Y., Ikemi, M.
    • Journal Title

      Proc.3rd Asian Rock Mechanics Symposium Vol.1

      Pages: 1181-1186

    • Description
      「研究成果報告書概要(欧文)」より
  • [Patent(Industrial Property Rights)] 軸変位計測装置及び軸変位計測方法2005

    • Inventor(s)
      谷 和夫, 池野谷尚史, 鶴俊太郎
    • Industrial Property Rights Holder
      横浜国立大学, サンキ産業
    • Industrial Property Number
      特願2005-303764
    • Filing Date
      20051000
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2007-12-13  

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