Coefficient of earth pressure at rest for normally and overconsolidated peat ground in Hokkaido area
Identifieur interne : 000323 ( Main/Exploration ); précédent : 000322; suivant : 000324Coefficient of earth pressure at rest for normally and overconsolidated peat ground in Hokkaido area
Auteurs : Hirochika Hayashi [Japon] ; Nobutaka Yamazoe [Japon] ; Toshiyuki Mitachi [Japon] ; Hiroyuki Tanaka [Japon] ; Satoshi Nishimoto [Japon]Source :
- Soils and foundations [ 0038-0806 ] ; 2012.
Descripteurs français
- Pascal (Inist)
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- topic : Tourbe.
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Abstract
Peat, which is widely distributed in Hokkaido, is a very soft and problematic soil. To perform an elasto-plastic Finite Element (FE) analysis, it is important to accurately determine the initial stress conditions, and among them, the value of the coefficient of earth pressure at rest (K0 value) is particularly important. A K0-consolidation test using triaxial testing apparatus and a flat dilatometer were performed to investigate the K0 value for peat ground in Hokkaido, Japan. It was found that the K0 value for normally consolidated peat and organic clay (K0NC) decreases with an increase in the ignition loss. The K0 value for overconsolidated peat and organic clay (K0OC) is more strongly dependent on the over consolidation ratio (OCR) than that of usual inorganic clay. That is, it is known that Kooc is empirically related to K0NC, as expressed by K0OC=K0NCOCRm, and in peat and organic clay the power of m increases with their ignition loss. An experimental equation to estimate K0 using a flat dilatometer for peat ground is also proposed.
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aut.</sZ></inist:fA14><country>Japon</country><wicri:noRegion>Sapporo</wicri:noRegion></affiliation></author><author><name sortKey="Mitachi, Toshiyuki" sort="Mitachi, Toshiyuki" uniqKey="Mitachi T" first="Toshiyuki" last="Mitachi">Toshiyuki Mitachi</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>College of Industrial Technology, Nihon University, 1-2-1 Izumi-cho</s1><s2>Narashino</s2><s3>JPN</s3><sZ>3 aut.</sZ></inist:fA14><country>Japon</country><wicri:noRegion>Narashino</wicri:noRegion></affiliation></author><author><name sortKey="Tanaka, Hiroyuki" sort="Tanaka, Hiroyuki" uniqKey="Tanaka H" first="Hiroyuki" last="Tanaka">Hiroyuki Tanaka</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Graduate School of Engineering, Hokkaido University, West8 North13</s1><s2>Sapporo</s2><s3>JPN</s3><sZ>4 aut.</sZ></inist:fA14><country>Japon</country><wicri:noRegion>Sapporo</wicri:noRegion></affiliation></author><author><name sortKey="Nishimoto, Satoshi" sort="Nishimoto, Satoshi" uniqKey="Nishimoto S" first="Satoshi" last="Nishimoto">Satoshi Nishimoto</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Chvil Engineering Research Institute for Cold Region, 1-3 Hiragishi</s1><s2>Sapporo</s2><s3>JPN</s3><sZ>1 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Japon</country><wicri:noRegion>Sapporo</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">13-0069339</idno><date when="2012">2012</date><idno type="stanalyst">PASCAL 13-0069339 INIST</idno><idno type="RBID">Pascal:13-0069339</idno><idno type="wicri:Area/PascalFrancis/Corpus">000062</idno><idno type="wicri:Area/PascalFrancis/Curation">000706</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000085</idno><idno type="wicri:doubleKey">0038-0806:2012:Hayashi H:coefficient:of:earth</idno><idno type="wicri:Area/Main/Merge">000326</idno><idno type="wicri:Area/Main/Curation">000323</idno><idno 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aut.</sZ></inist:fA14><country>Japon</country><wicri:noRegion>Sapporo</wicri:noRegion></affiliation></author><author><name sortKey="Mitachi, Toshiyuki" sort="Mitachi, Toshiyuki" uniqKey="Mitachi T" first="Toshiyuki" last="Mitachi">Toshiyuki Mitachi</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>College of Industrial Technology, Nihon University, 1-2-1 Izumi-cho</s1><s2>Narashino</s2><s3>JPN</s3><sZ>3 aut.</sZ></inist:fA14><country>Japon</country><wicri:noRegion>Narashino</wicri:noRegion></affiliation></author><author><name sortKey="Tanaka, Hiroyuki" sort="Tanaka, Hiroyuki" uniqKey="Tanaka H" first="Hiroyuki" last="Tanaka">Hiroyuki Tanaka</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Graduate School of Engineering, Hokkaido University, West8 North13</s1><s2>Sapporo</s2><s3>JPN</s3><sZ>4 aut.</sZ></inist:fA14><country>Japon</country><wicri:noRegion>Sapporo</wicri:noRegion></affiliation></author><author><name sortKey="Nishimoto, Satoshi" sort="Nishimoto, Satoshi" uniqKey="Nishimoto S" first="Satoshi" last="Nishimoto">Satoshi Nishimoto</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Chvil Engineering Research Institute for Cold Region, 1-3 Hiragishi</s1><s2>Sapporo</s2><s3>JPN</s3><sZ>1 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Japon</country><wicri:noRegion>Sapporo</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Soils and foundations</title><title level="j" type="abbreviated">Soils found.</title><idno type="ISSN">0038-0806</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Soils and foundations</title><title level="j" type="abbreviated">Soils found.</title><idno type="ISSN">0038-0806</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Compression test</term><term>Dilatometry</term><term>Earth pressure</term><term>Elastoplasticity</term><term>Finite element method</term><term>Hokkaido</term><term>In situ test</term><term>Laboratory test</term><term>Organic clay</term><term>Overconsolidated soil</term><term>Peat</term><term>Performance evaluation</term><term>Property of soil</term><term>Site analysis</term><term>Soil consolidation</term><term>Soil test</term><term>Triaxial compression</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Sol surconsolidé</term><term>Tourbe</term><term>Essai sol</term><term>Poussée terre</term><term>Hokkaïdo</term><term>Dilatométrie</term><term>Consolidation sol</term><term>Argile organique</term><term>Evaluation performance</term><term>Elastoplasticité</term><term>Méthode élément fini</term><term>Caractéristique sol</term><term>Analyse site</term><term>Essai compression</term><term>Compression triaxiale</term><term>Essai laboratoire</term><term>Essai en place</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Tourbe</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Peat, which is widely distributed in Hokkaido, is a very soft and problematic soil. To perform an elasto-plastic Finite Element (FE) analysis, it is important to accurately determine the initial stress conditions, and among them, the value of the coefficient of earth pressure at rest (K<sub>0</sub> value) is particularly important. A K<sub>0</sub>-consolidation test using triaxial testing apparatus and a flat dilatometer were performed to investigate the K<sub>0</sub> value for peat ground in Hokkaido, Japan. It was found that the K<sub>0</sub> value for normally consolidated peat and organic clay (K<sub>0NC</sub>) decreases with an increase in the ignition loss. The K<sub>0</sub> value for overconsolidated peat and organic clay (K<sub>0OC</sub>) is more strongly dependent on the over consolidation ratio (OCR) than that of usual inorganic clay. That is, it is known that K<sub>ooc</sub> is empirically related to K<sub>0NC</sub>, as expressed by K<sub>0OC</sub>=K<sub>0NC</sub>OCR<sup>m</sup>, and in peat and organic clay the power of m increases with their ignition loss. An experimental equation to estimate K<sub>0</sub> using a flat dilatometer for peat ground is also proposed.</div></front></TEI><affiliations><list><country><li>Japon</li></country></list><tree><country name="Japon"><noRegion><name sortKey="Hayashi, Hirochika" sort="Hayashi, Hirochika" uniqKey="Hayashi H" first="Hirochika" last="Hayashi">Hirochika Hayashi</name></noRegion><name sortKey="Mitachi, Toshiyuki" sort="Mitachi, Toshiyuki" uniqKey="Mitachi T" first="Toshiyuki" last="Mitachi">Toshiyuki Mitachi</name><name sortKey="Nishimoto, Satoshi" sort="Nishimoto, Satoshi" uniqKey="Nishimoto S" first="Satoshi" last="Nishimoto">Satoshi Nishimoto</name><name sortKey="Tanaka, Hiroyuki" sort="Tanaka, Hiroyuki" uniqKey="Tanaka H" first="Hiroyuki" last="Tanaka">Hiroyuki Tanaka</name><name sortKey="Yamazoe, Nobutaka" sort="Yamazoe, Nobutaka" uniqKey="Yamazoe N" first="Nobutaka" last="Yamazoe">Nobutaka Yamazoe</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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