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Earthquake-induced flow-type slope failures in volcanic sandy soils and tentative evaluation of the fluidization properties of soils

机译：地震作用下火山砂土的流动型边坡破坏及土壤流化特性的初步评估

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摘要

Japan has many experiences of mudflow-type failures of volcanic sandy soil slopes duringrnearthquakes. Firstly in this paper, several major cases of the flow-type failures are outlined. In general, undisturbedrnpyroclastic deposits have high strength against to fluidization because of its cementation effect. However, oncernthe deposits are disturbed to use as an earth fill materials, the shear strength of disturbed soils cannot be expected.rnRather, the disturbed pyroclastic soils are weaker than ordinary sandy soils. Therefore, it is necessary to evaluaternthe fluidization property of disturbed pyroclastic sandy soils for mitigating mudflow disaster. In this study, wernintroduce a drum type testing machine to evaluate the fluidization property. Two kinds of volcanic sandy soilsrnare used as a specimen sampled from volcanic area in Japan. In addition to this, the wireless multi sensor whichrncan be installed in the movable soils is introduced.
机译：日本在地震过程中曾经历过火山砂质土质边坡的泥石流型破坏。首先，本文概述了几种主要的流型故障案例。通常，未扰动的碎屑屑沉积物由于其胶结作用而具有抗流化的高强度。但是，一旦扰动了沉积物用作填土材料，就无法期望扰动土壤的剪切强度。相反，扰动的碎屑土比普通的沙土弱。因此，有必要评估扰动的火山碎屑沙土的流化特性，以减轻泥石流灾害。在这项研究中，我们引入了一种鼓式试验机来评估流化性能。两种火山砂土被用作从日本火山区取样的标本。除此之外，还介绍了可以安装在可移动土壤中的无线多传感器。

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  • 来源
    《Volcanic rocks and soils》|2016年|363-369|共7页
  • 会议地点 Lacco Ameno(IT)
  • 作者

    M. Kazama; T. Kawai; J. Kim; M. Takagi; T. Morita; T. Unno;

  • 作者单位

    Tohoku University, Sendai, Japan;

    Tohoku University, Sendai, Japan;

    Tohoku University, Sendai, Japan;

    Tohoku University, Sendai, Japan;

    Gunma Institute of Technology, Gunnma, Japan;

    Utsunomiya University, Utsunomiya, Japan;

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  • 正文语种 eng
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