基于分布式光纤温度传感技术的渗流监测试验

Seepage Monitoring Test Based on Distributed Optical Fiber Temperature Sensing Technology

为实现实时、长距离和分布式的渗流监测,基于分布式光纤温度传感技术定位原理,设计了室内渗流监测模型及理想的提高渗流监测空间测量精度的光纤布置方式,通过对埋置于粘土、砂土以及均匀混合土壤中的光纤进行加热模拟渗流试验,对比分析不同渗流量下光纤温降情况,说明光纤布置方式的合理性及渗流定量监测的可行性,并给出了提高温度测量精度及压实效果的有效措施。

In order to achieve real-time,long distance and distributed seepage monitoring,based on the positioning principle of distributed optical fiber temperature sensing technology,this paper designs the indoor seepage monitoring model and ideal optical fiber arrangement for improving spatial accuracy of seepage monitoring.The heating simulation of seepage experiments are carried out for the optical fiber buried in clay,sandy soil and uniform mixed soil.The optical fiber temperature drop is comparative analysis under different seepage flow conditions,which demonstrates the rationality of optical fiber arrangement and the feasibility of seepage quantitative monitoring.Finally,it gives the improving precision of temperature measurement and the compaction effect of effective measures.