振弦式传感器在大坝安全监测系统中的应用及施工期监测分析

Application of vibrating wire sensor to dam safety monitoring system and analysis on monitoring during construction

振弦式传感器具有测量精度高、抗干扰能力强、结构简单等优点,广泛应用于大坝安全监测。介绍了大坝安全监测系统的结构,对比了振弦式传感器在两个不同类型水库中的应用。通过分析振弦式传感器的测量原理,推导其数学模型,给出了一般计算公式。结合玉皇阁水库大坝安全监测系统,详细介绍了振弦式传感器在渗流、应变和变形监测中的实际应用,并对施工期的监测数据进行了分析。结果显示各项监测指标符合施工期一般规律,表明水库在施工期运行正常,同时说明了振弦式传感器能够反映大坝运行的状况,满足大坝安全监测的要求。

As vibrating wire sensor has the merits of high measurement accuracy,strong anti-interference capacity,simple structure,etc.,it is widely applied to dam safety monitoring.The structure of dam safety monitoring system is introduced herein,while the applications of the vibrating wire sensors to two different types of reservoir dams are compared as well.Through analyzing the measurement principle of the vibrating wire sensor and deducing its mathematical model,a general calculation formula is given out.Finally,in combination with the safety monitoring system for Yuhuangge Dam,the actual applications of the vibrating wire sensors in the monitorings of seepage,strain and deformation are described in detail,while the relevant monitoring data during the construction are also analyzed.The results show that all the monitoring indexes are consistent with the general laws during the construction period,which indicate that the operation of the reservoir is normal during the construction period and show that the vibrating wire sensor can reflect the operation status of the dam and meet the relevant requirement of the dam safety monitoring.