<原著>廃棄発泡プラスチック破砕片混合土の非排水せん断特性  [in Japanese] <Original>Undrained Shear Characteristics of Crushed Expanded Plastic Wastes Mixed Soil  [in Japanese]

Abstract

廃棄発泡プラスチック破砕片を軽量地盤材料として有効利用することを目的に,これを用いた軽量混合土を作製し,圧密非排水三軸圧縮試験を行うことによりその基本的な力学特性を検討した。その結果,強度特性については,有対応力で考える限り,両者のせん断挙動にはほとんど差が見られず,内部摩擦角などの強度定数も同じであることがわかった。その一方で,変形特性については,混合土の方が土よりもかなり圧縮されやすいことが確認され,その差は,同一荷重による圧密量および間隙水圧が最大値に達するまでの圧縮量で比較すると約2.5倍程度であることがわかった。従って,有効応力のみで考える限りは両者の強度特性に差はないものの,変形量やひずみで破壊を定義する場合には混合土の方がより小さな応力で破壊に達する可能性があるため,実際の設計や施工においては応力とひずみの双方から安定性を検討する必要があることが明らかになった。

It was intend to make research into the efficient utilization of crushed expanded plastic wastes, by way of light-weight geomaterials. In this study, light-weight mixed soils were made using plastic waste, and a series of consohdated-undrained triaxial compression tests were conducted to investigate the mechanical properties of the soils. As a result, it was clarified that the strength properties such as internal friction angle and effective stress path were almost the same between these soils. On the other hand, deformation properties were quite different from each other. The compressibility under the same consolidation pressure and the axial strain until pore water pressure reaches maximum of the mixed soil was about 2.5 times larger than that of soil alone. Consequently, it was found that the stability should be examined from the both criteria of stress and strain conditions, under actual designing and construction. Because it is possible for the mixed soil to fail more small stress state when the failure is defined from deformation and strain conditions, though the strength parameters obtained from effective stress relation are almost the same between mixed soil and soil alone.

Journal

Scientific report of the Graduate School of Agriculture and Biological Sciences, Osaka Prefecture University   [List of Volumes]

Scientific report of the Graduate School of Agriculture and Biological Sciences, Osaka Prefecture University 53, 15-21, 2001-03-31  [Table of Contents]

Osaka Prefecture University

Cited by:  4

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Codes

  • NII Article ID (NAID) :
    110000039924
  • NII NACSIS-CAT ID (NCID) :
    AA11576192
  • Text Lang :
    JPN
  • Article Type :
    Journal Article
  • ISSN :
    13461575
  • Databases :
    CJPref  NII-ELS  IR 

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