京都大学 · 環境科学
Wang教授の研究室では、土砂災害の発生機構とメカニズムの解明を目的として、特に液状化を伴う斜面崩壊の挙動に注目した土の動的挙動に関する実験的研究を進めています。特に、長時間にわたるせん断変位下での不排水挙動や、細粒含有土の液状化挙動をリングサーベス試験を用いて詳細に分析しています。これにより、災害発生メカニズムの予測・防止に資する土の力学的特性の解明を目指しています。
Figures are computed from collected data and may differ slightly.
Abstract A typhoon (Typhoon No. 10) attacked Shikoku Island and the Tyugoku area of Japan in 2004. This typhoon produced a new daily precipitation record of 1317 mm on Shikoku Island and triggered hundreds of landslides in Tokushima Prefecture. One catastrophic landslide was triggered in the Shiraishi area of Kisawa village, and destroyed more than 10 houses while also leaving an unstable block high on the slope. The unstable block kept moving after the event, showing accelerating and decelerati
The undrained shear behavior of soils with progress of shear displacement is essential to the understanding of liquefied slope failures with long travel distance. In this paper, using a newly developed ring shear apparatus, a series of ring-shear tests were conducted on a silty sand to examine the undrained behavior of sand subjected to long shear displacement. Based on the test results, the undrained shear behavior of sands with a wide range of densities is discussed. A very low effective stres
The shearing behavior of saturated silty soils has been examined extensively by performing undrained and partially drained (the upper drainage valve of the shear box was open during shearing) ring-shear tests on mixtures of a sandy silt with different loess contents. By performing tests at different initial void ratios, the shear behavior of these silty soils at different initial void ratios is presented and discussed. Undrained-shear-test results showed that the liquefaction phenomena in ring-s
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