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  1. 紀要論文
  2. 琉球大学農学部学術報告
  3. 37号
  1. 部局別インデックス
  2. 農学部

さんご礁石灰質砂のせん断特性(農業工学科)

http://hdl.handle.net/20.500.12000/3861
http://hdl.handle.net/20.500.12000/3861
7e2eebf7-888f-4801-ab91-6ac144163fc6
名前 / ファイル ライセンス アクション
KJ00000161641.pdf KJ00000161641.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 さんご礁石灰質砂のせん断特性(農業工学科)
言語 ja
作成者 新城, 俊也

× 新城, 俊也

ja 新城, 俊也

宮城, 調勝

× 宮城, 調勝

ja 宮城, 調勝

小宮, 康明

× 小宮, 康明

ja 小宮, 康明

島袋, 進

× 島袋, 進

ja 島袋, 進

Shinjo, Toshiya

× Shinjo, Toshiya

en Shinjo, Toshiya

Miyagi, Norikatsu

× Miyagi, Norikatsu

en Miyagi, Norikatsu

Komiya, Yasuaki

× Komiya, Yasuaki

en Komiya, Yasuaki

Shimabukuro, Susumu

× Shimabukuro, Susumu

en Shimabukuro, Susumu

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
内容記述
内容記述タイプ Other
内容記述 3種類のさんご砂について排水せん断試験を実施した。結果を要約すると次のようである。1) さんご砂はさんご,貝類,石灰藻,有孔虫,うになどのさんご礁に棲息する生物の石灰質遺骸であり,場所によって粒度,粒形などの粒子特性が異なるが,炭酸カルシウム含有量が95%以上の石灰質砂である。2) 同じ相対密度でも砂ごとに密度に差があり,大きな間隙を形成する砂は緩詰め砂に類似した挙動,また小さな間隙を形成する砂は密詰め砂に類似した挙動を示し,応力∿ひずみ挙動は粒子特性によって決まる間隙比の大きさに支配される。3) 同じ相対密度でも大きい間隙比を形成する砂はせん断過程での粒子破砕が顕著であり,粒子破砕はダイレイタンシーなどの変形挙動に影響を及ぼす。4) 粒子破砕は側圧による強度増加の割合を減少させ,強度特性にも影響を及ぼす。5) 排水ヤング率E'は拘束圧σ'_cの増加とともに増大し,これらは式(3)の関係で表せる。一方ポアソン比νは拘束圧の増加に伴って減少し,これらは式(4)の関係で近似できる。
内容記述タイプ Other
内容記述 Drained triaxial compression tests were performed on the three sand from the coral reef in Ryukyus Islands. Stress-strain behaviors and the influence of particle crushing on strength-deformation characteristics were discussed. Sands were composed of coral fragments, shell, foraminifera, algae, etc., and had the carbonate content in exceed of 95%. Particle crushing during shearing process occurred in sand which resulted large void space under the same relative density. It was found that there was a tendency for both suppression of dilation and the decrease in the peak friction angle with the increase in particle crushing. In the conventional triaxial test, increasing confining pressure was found to increase Young's modulus and decrease Poisson's 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/20.500.12000/3861
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 37, p. 183-190
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