CYCLIC STRENGTH OF ROAD EMBANKMENT SOILS

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type 01 Jan 2009Publisher:Japan Society of Civil EngineersJournal:Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), volume 65, pages 875-880 (eissn: 2185-4653,

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Authors: FUJIOKA, Kazuyori; YASUDA, Susumu; SHIRATORI, Shotaro;

doi: 10.2208/jscejseee.65.875

CYCLIC STRENGTH OF ROAD EMBANKMENT SOILS

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Abstract

2004年10月23日にの新潟県中越地震（マグニチュード6.8）が発生し，関越自動車道の堀之内IC付近から小千谷ICの付近まで盛土が大きく沈下·変形する被害が生じた．地震後に土質調査を実施したところ盛土内の水位が存在し，盛土下部は飽和していることが判明した．そこで，いつくかの盛土材料を用いて繰返し非排水せん断強度および繰返しによるせん断剛性の低下を繰返しねじり試験により調べた．その結果，繰返しせん断強度比は，不飽和土が飽和土より大きいことや，その値は塑性指数と相関があること，高い繰返しせん断応力比が作用した場合には，不飽和条件においても材料の軟化が生じることなどが判明した．

Keywords

Road embankment, Cyclic strength of soils, Laboratory soil test

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