Undrained dynamic-loading ring-shear apparatus and its application to landslide dynamics
Undrained dynamic-loading ring-shear apparatus and its application to landslide dynamics
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DOI：
10.1007/s10346-003-0004-y
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发表时间：
2004-03-01
期刊：
影响因子：
6.7
通讯作者：
Ishikawa, Naohide
中科院分区：
文献类型：
--
作者：
Sassa, Kyoji;Fukuoka, Hiroshi;Ishikawa, Naohide
滑坡是岩石、碎石或泥土的重力质量运动。有些运动很慢，因此符合静力学领域，但有些运动很快。研究快速滑坡的启动和运动需要发展“滑坡动力学”，包括动态加载和超静孔压的动态产生/消散。新的技术进步可以促进科学的新发展。这项研究的目的是开发一种新的装置，可以从地质上模拟高速滑坡中剪切带的形成和随后的长而快速的剪切位移。K.Sassa教授和他在京都大学灾害预防研究所的同事们为此目的开发了一种不排水的动态加载环形剪切仪。从1992年到现在，已经开发了一系列不同类型的仪器(DPRI-3、4、5、6、7)。本文介绍了该仪器的发展及其在地震引发的滑坡和日本最新的滑坡引发的泥石流研究中的应用。此外，还描述了最新版本(DPRI-7)的试验，它带有透明剪切盒，可以在快速剪切过程中直接观察剪切带。
Landslides are gravitational mass movements of rock, debris or earth. Some move very slowly, thus conforming to the field of statics, but some move rapidly. Study of the initiation and motion of rapid landslides needs to develop "Landslide Dynamics" involving dynamic loading and dynamic generation/dissipation of excess pore-water pressure. New developments in science can be facilitated by new technological advances. This study aimed to develop a new apparatus that can geotechnically simulate the formation of the shear zone and the following long and rapid shear displacement that occurs in high-velocity landslides. Professor K. Sassa and his colleagues at DPRI (Disaster Prevention Research Institute), Kyoto University, have worked to develop an undrained dynamic-loading ring-shear apparatus for this purpose. A series of different types of apparatus (DPRI-3, 4, 5, 6, 7) have been developed from 1992 to the present. This paper describes the development of this apparatus and its application to the study of earthquake-induced landslides and the latest landslide-triggered debris flow in Japan. Also, tests of the latest version (DPRI-7) with a transparent shear box for direct observation of the shear zone during a rapid shearing are described.