Abstract: OTDR technology and GBMS flexible inclinometer are used to construct an automatic monitoring system for the dumping site slope. The system consists of three subsystems: (1) OTDR surface deformation alarm subsystem, covers most areas of the dumping site slope with cobweb optical fiber layout scheme, achieving the effect of overall monitoring and alarm for surface deformation of slope; (2) deep displacement monitoring subsystem, captures the deformation signs of the deep slope body in time through a GBMS flexible inclinometer, to obtain the change amount of deep displacement; (3) underground water level and rainfall monitoring subsystem, uses the piezometers and rain gauge to measure the change trend of the underground water level of the slope body and rainfall, and monitor the triggering factor of slope instability. The three subsystems cooperate with each other and finally work together to form a set of economic and scientific slope monitoring system for dumping site slope.

Key words: dumping site, slope monitoring, flexible inclinometer, OTDR

摘要： 采用OTDR光时域反射与GBMS柔性测斜技术构建了一套适用于弃渣场边坡的自动化监测系统。该系统由三个子系统组成：（1）OTDR地表变形破坏告警子系统采用蛛网状光纤布设方案覆盖弃渣场边坡大部分区域，达到对边坡地表变形整体监测告警的效果；（2）深部位移监测子系统通过GBMS柔性测斜仪实时监控深层坡体变形迹象，获取深部位移变化量；（3）地下水位及降雨量监测子系统使用渗压计和雨量计测量坡体地下水位变化趋势和降雨情况，监测边坡失稳触发因子。三个子系统互相协同，最终结合形成一套经济科学的弃渣场边坡监测系统。

关键词: 弃渣场, 边坡监测, 柔性测斜仪, OTDR