000010012 001__ 10012
000010012 005__ 20141205154138.0
000010012 04107 $$aeng
000010012 046__ $$k2008-10-12
000010012 100__ $$aFujioka, Kazuyori
000010012 24500 $$aCyclic Soil Tests to Propose Appropriate Seismic Design Methods for Sliding Type and Slump Type Failures of Road Embankments

000010012 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010012 260__ $$b
000010012 506__ $$arestricted
000010012 520__ $$2eng$$aOn October 23 in 2004, the Niigataken-chuetsu earthquake, of Magnitude 6.8, occurred in Japan. The maximum surface acceleration recorded at Kawaguchi town was 1722 Gals. Many railways including Shinkansen, roads, houses, pipelines and other structures were severely damaged. Similarly highway embankments were damaged. Especially, the damages in two areas: 1) between Horinouchi and Kawaguchi and 2) near Ojiya IC, were serious. In the first area, the highway road was constructed by cut and fill method on the slope of hill. Sliding of filled embankments occurred at several sites. On the contrary, in the second area, highway embankment was constructed by filling soils on lowland plain. Surface soil of the plane is gravel, sand or clay. The reason why the sliding of the embankment in the first area occurred may be due to inertia force and/or excess pore water pressure. Then the authors conducted many dynamic soil tests to study the detailed mechanism of the failures. Cyclic torsional shear tests were carried out to demonstrate the following items: a) cyclic strength of saturated soil, b) cyclic strength of unsaturated soil, and c) shear modulus of the soil after cyclic loading. Test results showed that cyclic strength and shear modulus of saturated soil was comparatively low. And, under high cyclic shear stress, failure occurred even though the sample was unsaturated. These test results contribute to appropriate seismic design methods of road embankments proposed for sliding type failure and slump type failure.

000010012 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010012 653__ $$aCyclic strength of soils, Road embankment, Laboratory soil test

000010012 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010012 720__ $$aFujioka, Kazuyori$$iYasuda, Susumu$$iShiratori, Syotaro
000010012 8560_ $$ffischerc@itam.cas.cz
000010012 8564_ $$s716739$$uhttps://invenio.itam.cas.cz/record/10012/files/04-02-0097.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 04-02-0097.
000010012 962__ $$r9324
000010012 980__ $$aPAPER