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  1. 紀要論文
  2. 琉球大学農学部学術報告
  3. 41号
  1. 部局別インデックス
  2. 農学部

礫混合土の締固め密度について(生産環境学科)

http://hdl.handle.net/20.500.12000/3770
http://hdl.handle.net/20.500.12000/3770
e1f9d22b-a387-44f7-a26d-e6f667c70667
名前 / ファイル ライセンス アクション
KJ00000161750.pdf KJ00000161750.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2008-02-14
タイトル
タイトル 礫混合土の締固め密度について(生産環境学科)
言語 ja
作成者 宮城, 調勝

× 宮城, 調勝

ja 宮城, 調勝

新城, 俊也

× 新城, 俊也

ja 新城, 俊也

小宮, 康明

× 小宮, 康明

ja 小宮, 康明

Miyagi, Norikatsu

× Miyagi, Norikatsu

en Miyagi, Norikatsu

Sinjyo, Tosiya

× Sinjyo, Tosiya

en Sinjyo, Tosiya

Komiya, Yasuaki

× Komiya, Yasuaki

en Komiya, Yasuaki

アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
主題
言語 ja
主題Scheme Other
主題 締固め密度
言語 ja
主題Scheme Other
主題 礫質土
言語 ja
主題Scheme Other
主題 礫率
言語 ja
主題Scheme Other
主題 透水係数
内容記述
内容記述タイプ Other
内容記述 国頭マージの中で一般的である千枚岩風化土について, 礫を混合した場合の混合土の密度, 礫以外の部分の密度の変化および礫の粒径を変えた場合の土の密度の変化などについて実験をしながら, 同時に透水係数の礫率による変化を調べた。礫混合どの場合, 礫率が増すと土全体の密度は高まり, 締固めた土の強度が増すことは一般的に判断される。しかしこの土を遮水材料として使用する場合は, 礫を混合する時の透水係数の増大が問題になる。この実験の結果から, 礫率が増加するにつれて礫以外の部分の密度は低下し, 透水係数も大きくなることを示した。また礫率が同じであれば, 混合に使用する礫の粒径が大きいものほど混合土の密度は大きくなることが分かった。また透水の難易を支配する礫以外の部分も, 礫の粒径が大きいものほど大きい密度を示すことが分かった。このことは, 礫混合土における透水係数の増大は, 単に礫同士の噛み合いによるだけではなく, 礫の表面積の大きさ, いいかえれば礫が押し込まれるときの全体としての表面積が小さいものほど, 礫以外の部分の密度が低下しないことになる。また, 室内試験における締固めエネルギーの大きさの, 現場に於ける対応については, 前述のように支配要素は多すぎるが, いくつかの条件を固定すればある程度の目途は立つものと考えられる。
内容記述タイプ Other
内容記述 Cohesive soils are frequently mixed with gravelly soil for soil improvement. Soil materials are improved in soil mechanics by mixing gravelly soils. But in a case of materials used as a core of fill dam, it is necessary for compacted soil to be impervious. In this paper, the dry density which is separated the part of excepting gravel from gravelly compacted soil were investigated. The results obtained are as follows. 1. The values of dry density and coefficient of permeability of compacted soil increased with the increase of gravelly ratio. 2. Dry density in the part of excepting gravel contrarily decreases with the increase of gravelly ratio. 3. It seems that the dry density of gravelly soil depends on size of gravel and specific surface area of gravel in the same gravelly ratio.
内容記述タイプ Other
内容記述 紀要論文
出版者
言語 ja
出版者 琉球大学農学部
言語
言語 jpn
資源タイプ
資源タイプ departmental bulletin paper
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
識別子
識別子 http://hdl.handle.net/20.500.12000/3770
識別子タイプ HDL
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0370-4246
収録物識別子タイプ NCID
収録物識別子 AN00250548
収録物名
言語 ja
収録物名 琉球大学農学部学術報告
書誌情報
号 41, p. 237-242
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