Precaution and early warning of surface failure of slopes using tilt sensors
Precaution and early warning of surface failure of slopes using tilt sensors
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DOI：
10.1016/j.sandf.2015.09.010
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发表时间：
2015-10-01
影响因子：
3.7
通讯作者：
Qiao, Jianping
中科院分区：
文献类型：
--
作者：
Uchimura, Taro;Towhata, Ikuo;Qiao, Jianping
提出了一种简易的滑坡预警监测方法。该方法主要监测边坡表层的倾角。在本研究的第一阶段，与比例模型边坡，不同的行为被观察到的倾斜角监测的表面上的边坡破坏前。为此，研制了一套具有微机电系统（MEMS）倾角传感器和容积式含水量传感器的实际应用装置。还开发了倾斜传感器的可选布置，以研究更深层的变形。这些设备已在日本和中国的几个斜坡现场部署，并记录了它们的性能。在天然边坡上进行了人工强降雨条件下的边坡破坏试验。所开发的系统检测到不同的行为，在这些网站的倾斜角度在故障前的阶段。考虑到在这些斜坡表面监测到的倾斜行为，建议以每小时0.01度的倾斜率发布预防措施，并以每小时0.1度的倾斜率发布警告，这是保守的。(C)2015年，日本地质学会。Elsevier B.V.制作和主持。保留所有权利。
A simple monitoring method for the early warning of rainfall-induced landslides is proposed. Tilting angles in the surface layer of the slope are mainly monitored in this method. In the first stage of this study with a scaled model slope, distinct behaviors were observed in the tilt angles monitored on the surface of the slope prior to failure. Hence, a set of equipment has been developed for practical use, which is equipped with a Micro Electro Mechanical Systems (MEMS) tilt sensor and a volumetric water content sensor. An optional arrangement of tilt sensors has also been developed in order to investigate the deformation of the deeper layers. These sets of equipment have been deployed at several slope sites in Japan and China, and their performances have been recorded. Slope failure tests were also conducted on a natural slope by applying artificial heavy rainfall. The developed system detected distinct behaviors in the tilting angles at these sites in the pre-failure stages. Considering the behaviors of tilting monitored on the surfaces of these slopes, it is proposed that a precaution be issued at a tilting rate of 0.01 degrees per hour and a warning be issued at a tilting rate of 0.1 degrees per hour, to be on the conservative side. (C) 2015 The Japanese Geotechnical Society. Production and hosting by Elsevier B.V. All rights reserved.