基于蛇形分布式光纤的堤防浸润线定位试验

Location test of embankment seepage line based on snake-shaped distributed optical fiber

在堤防浸润线监测中,传统的光纤布置型式大部分采用直线布置,因光纤定位精度技术的限制,其监测结果受到严重影响。为提高堤防浸润线定位精度,根据测温光纤测点定位特点,设计并制作了一种新的蛇形分布式光纤用于浸润线的监测。通过水深测量试验模拟堤防浸润线监测,确定了新布型监测光纤长度与浸润线位置的关系式。计算水深与实际水深对比结果表明,两者之间的误差在3%以内,验证了蛇形分布式光纤新布型具有较高的定位精度。

In the monitoring of embankment seepage line,most of the traditional optical fiber distribution patterns adopt linear arrangement,which seriously affect the monitoring results because of the limitation of optical fiber positioning precision technology.In order to improve the positioning accuracy of embankment seepage line,a new type of snake-shaped distributed optical fiber was designed and manufactured for monitoring embankment seepage line according to the positioning characteristics of the temperature measurement optical fiber.The relationship between length of the new distributed optical fiber and position of seepage line is determined by simulating the monitoring of embankment seepage line through water depth measurement test.The comparison of the calculated water depth and the actual water depth show that the error between the two is within 3%,which verifies that the snake-shaped distributed optical fiber has a higher positioning accuracy.