摘要
探索基于三维电子罗盘的变形测量方法可用于边坡变形监测,作为滑坡地表变形监测的有力补充。三维电子罗盘由一个三轴加速度计和一个三轴磁力计组成,将6个测量数据加以计算,可得监测设备在三维空间的姿态,长期测量则可以追踪监测点在三维空间中的姿态变化。通过在溪洛渡水电站库区岸坡上安装的三维电子罗盘监测点,进行了为期1a的监测。经解算分析,在一个水文年中,岸坡监测部位在水平及竖直方向上的转动角度最大达到1°。结合库水位的变化分析可知,监测部位的转动与库水位高度和变化相关。再将姿态的变化与全球导航卫星系统(GNSS)测量得到的绝对位移结合使用,结果表明:在过去1a中,监测部位在水平方向上向对岸及上游侧冲沟方向变形,且向下游方向转动;垂直方向上发生沉降,且向坡脚方向转动。本方法为分析边坡变形和破坏模式,提供了新的思路。
A new monitoring method of slope deformation using 3 D electronic compass as a supplement to slope surface monitoring was proposed. The three-dimensional electronic compass consists of a three-axis accelerometer and a three-axis magnetometer,and the measurement data are calculated to obtain the attitude angle which represents the attitude of the device in a three-dimensional space. Slope deformation of Xiluodu reservoir bank was monitored about one year using the three-dimensional electronic compass and the measurement data were analyzed. It is revealed that the rotation angles in both the horizontal direction and the vertical direction reach 1°during a hydrological year,and that,by analyzing the variation of reservoir water level,the rotation has a strong relevance to the reservoir water table. Combing the method with the Global Navigation System(GNSS) method,it is also found that the horizontal deformation of the monitoring position points to the opposite bank and rotates downstream,and that the vertical settlement rotates to the slope foot direction in the past year. This method provides a new idea for analyzing slope deformation and failure mode.
作者
李程
宋胜武
陈卫东
殷跃平
LI Cheng;SONG Shengwu;CHEN Weidong;YIN Yueping(PowerChina Chengdu Engineering Corporation Limited,Chengdu,Siehuan 610072,China;College ofCivilEngineering,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043;China Institute of Geological Environment Monitoring,Beijing 100081,China)
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2019年第1期101-110,共10页
Chinese Journal of Rock Mechanics and Engineering
关键词
边坡工程
三维电子罗盘
库区岸坡
变形监测
slope engineering
electronic compass
reservoir bank
deformation monitoring
