SUN Ping, YIN Yueping, WU Shuren, WANG Fawu, CHEN Liwei. 2009: AN EXPERIMENTAL STUDY ON THE INITIATION MECHANISM OF RAPID AND LONG RUN-OUT LOESS LANDSLIDE CAUSED BY 1920 HAIYUAN EARTHQUAKE. JOURNAL OF ENGINEERING GEOLOGY, 17(4): 449-454.
    Citation: SUN Ping, YIN Yueping, WU Shuren, WANG Fawu, CHEN Liwei. 2009: AN EXPERIMENTAL STUDY ON THE INITIATION MECHANISM OF RAPID AND LONG RUN-OUT LOESS LANDSLIDE CAUSED BY 1920 HAIYUAN EARTHQUAKE. JOURNAL OF ENGINEERING GEOLOGY, 17(4): 449-454.

    AN EXPERIMENTAL STUDY ON THE INITIATION MECHANISM OF RAPID AND LONG RUN-OUT LOESS LANDSLIDE CAUSED BY 1920 HAIYUAN EARTHQUAKE

    • The 1920 Haiyuan Earthquake caused a great number of loess landslides, and resulted in more than 100,000 deaths. This paper investigates the Dangjiacha landslide, a typical rapid and long run-out landslide located in Xiji County triggered by Haiyuan earthquake. Representative soils on sliding surface were collected for soil tests. By using the advanced DPRI ring shear apparatus, a series of ring shear tests were carried out to study the initiation mechanism of Dangjiacha landslide under the seismic wave loading of EL-Centro Earthquake. This Earthquake occurred on May 18, 1940 in United States. The ring shear test results show that when the earthquake happened, the sliding surface liquefaction occurred on potential sliding surface of landslide. It was an important reason for taking place of rapid and long run-out landslide. Meanwhile, a large shear displacement (2.03 m) and a high pore water pressure (104 kPa) could be generated and a high velocity could be got for the sliding mass, which supplied a necessary condition for the generation of rapid and long run-out landslide.
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