Kyoto University · Environmental Science
Professor Gonghui Wang's research lab specializes in geotechnical earthquake engineering and slope stability, with a focus on the mechanisms of liquefaction-induced landslides and undrained shear behavior of saturated soils. The lab investigates the progressive failure of slopes under seismic and rainfall-induced loading, particularly through advanced ring-shear testing to understand long-displacement shear behavior and post-liquefaction mobility. Research also emphasizes the influence of soil composition, such as loess content and initial density, on undrained strength and liquefaction potential in silty sands. The lab's work contributes to improved risk assessment and countermeasure design for landslide-prone regions.
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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