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土石坝在使用过程中由于受荷载的长期效应、材料老化和环境侵蚀等自然因素的影响,大坝会受到损伤。为了有效地监测土石坝的健康状况和对其发生的结构损伤进行识别以及进一步对土石坝寿命进行预测,建立完善的土石坝结构监测系统是十分必要的。依据物联网分层思想,采用全光纤传输技术,通过以FBG传感器作为检测单元实现对土石坝裂缝、渗压等重要数据的采集、监测和处理,开发了基于光纤光栅传感网的土石坝监测系统。实际应用表明,该系统可实时呈现土石坝运行状况的关键参数信息,为工程除险加固和对大坝整体使用情况的了解起到了辅助作用。
Due to the natural factors such as the long-term effect of load, material aging and environmental erosion, the dam will be damaged during use. In order to effectively monitor the health status of earth-rock dams and identify their structural damage, and to further predict the life of earth-rock dams, it is necessary to establish a sound earth-rock dam structure monitoring system. According to the layered idea of IoT, all-optical fiber transmission technology is used to acquire, monitor and process the important data such as cracks and seepage pressure of earth-rock dam by using FBG sensor as detection unit, and earth-rock dam monitoring based on FBG sensor network system. The practical application shows that the system can present the key parameter information of earth dam operation status in real time and plays an auxiliary role for the project reinforcement and understanding of the overall dam usage.